The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

D B Jani - One of the best experts on this subject based on the ideXlab platform.

  • investigations on effect of operational conditions on performance of Solid Desiccant based hybrid cooling system in hot and humid climate
    Thermal science and engineering, 2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract A Solid Desiccant based hybrid system for space cooling application is proposed and analyzed. Performance assessment of the cooling system was carried out with use of experimental test set up during summer cooling season. Performance was evaluated in terms of dehumidifier effectiveness and coefficient of performance of the system. Experimental measurements were carried out at different reactivation temperature for change in ambient conditions. It is found that the regeneration temperature has a substantial effect on the system performance for the regeneration heat supply to reactivate the dehumidifier. Moreover, the obtained result depicts the Solid Desiccant based hybrid cooling system can attain better performance by ensuring its efficacious operation in hot as well as humid conditions to maintain required thermal comfort by ensuring 65.59% reduction in the humidity ratio as compared to that of the outdoor air.

  • performance analysis of a Solid Desiccant assisted hybrid space cooling system using trnsys
    Journal of building engineering, 2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract The traditional air conditioners suffer from performance degradation especially in humid conditions. This is due to fact that the excess moisture level in ventilation air considerably increases latent cooling load of the space to be conditioned. The use of Desiccant integrated vapor compression hybrid cooling system can alleviate this problem by controlling the temperature and humidity separately. It also reduces energy consumption for obtaining desired thermal comfort. In the present study, TRNSYS simulation studio project has been developed to perform the simulations of the Desiccant dehumidifier coupled vapor compression hybrid system for different configurations in summer cooling season. Experimental measurements are also carried out to observe the influence of operating parameters on system performance. The obtained results show that the proposed system has ensured a substantial reduction in process air humidity at dehumidifier exit while maintaining the conditioned room comfort.

  • a critical review on application of solar energy as renewable regeneration heat source in Solid Desiccant vapor compression hybrid cooling system
    Journal of building engineering, 2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract A review on solar powered Solid Desiccant – vapor compression hybrid cooling system has been carried out. This provides latest information on recent development in air-conditioning and built environment produced by use of hybrid cooling. Use of renewable solar energy can be a good source for regeneration heat provided in reactivating Desiccant dehumidifier used in alternate cooling systems. Desiccant dehumidification assisted vapor-compression based hybrid air-conditioning systems can successfully couple to renewable solar thermal power to dampen electricity use and to conserve environment in place of traditional air-conditioning. The energy saving potential of solar powered Desiccant cooling technologies is illustrated and discussed as compared to the vapor compression based conventional cooling systems. It is found that the Solid Desiccant integrated hybrid cooling systems are favourable than the conventional vapor compression cooling, because it is better means for economical and cleaner air-conditioning. The present review can ameliorate the usefulness of solar energy as renewable regeneration heat source in heat driven Solid Desiccant based hybrid cooling system and helps to guide future investigators to take the research opportunities in this area.

  • solar assisted Solid Desiccant vapor compression hybrid air conditioning system
    2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Solar assisted Solid Desiccant—vapor compression based hybrid space cooling system for building thermal comfort is made by integrating Desiccant based dehumidification system as well as by use of solar heating system along with conventional VCR system. This is because in humid climates, excessive humidity during summer leading to inefficiencies of conventional cooling devices. Humidity increment in ambient air as well as ventilation requirement suddenly rises the latent load of the space to be cooled. Conventional VCR systems are not effective in handling both temperature and relative humidity of cooling air independently. The application of Solid Desiccant based hybrid cooling systems significantly ameliorates the humidity control irrespective of temperature of supply air. The application of renewable free energy like as use of solar energy for regenerating the Desiccant used in Desiccant wheel helps us to alleviate the major requirement of electric energy needed by conventional VCR air-conditioning system for hot sunny days. So, it ameliorates overall energy efficiency and reduces energy costs. Performance of Solid Desiccant—vapor compression based hybrid building space comfort cooling system has been evaluated during hot and humid period from April to September for the ambient conditions of the Roorkee for various important parameters such as temperatures of supply air, room air and regeneration air etc. Regeneration temperature is one of the most important parameters having the key role in changing the performance of Desiccant based cooling system.

  • application of artificial neural network for predicting performance of Solid Desiccant cooling systems a review
    Renewable & Sustainable Energy Reviews, 2017
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    In present study, an attempt has been made to review the applications of artificial neural network (ANN) for predicting the performance of Solid Desiccant cooling systems. Different types of neural networks are applied to model the Solid Desiccant cooling systems. With use of experimental data, an ANN model was developed which is based on different algorithms. Available experimental data were divided into two categories for training and testing of the ANN model. Later on, trained ANN model was tested for predicting the performance of system based on various input and output parameters such as air stream flow rates, temperatures and humidity ratios, pressure drop, dehumidifier effectiveness, cooling capacity, regeneration temperature, power input, coefficient of performance etc. So, present review proposes the use of ANN based model to simulate the relationship between inlet and outlet parameters of the system. The ANN predictions for these parameters usually agreed with the experimental values with higher correlation co-efficient. The previous studies show that ANNs can be used with a higher precision in guessing the performance of Solid Desiccant cooling systems. This review is useful for making opportunities to further research of ANNs and its feasibility which is becoming common in the coming days.

P K Sahoo - One of the best experts on this subject based on the ideXlab platform.

  • performance analysis of a Solid Desiccant assisted hybrid space cooling system using trnsys
    Journal of building engineering, 2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract The traditional air conditioners suffer from performance degradation especially in humid conditions. This is due to fact that the excess moisture level in ventilation air considerably increases latent cooling load of the space to be conditioned. The use of Desiccant integrated vapor compression hybrid cooling system can alleviate this problem by controlling the temperature and humidity separately. It also reduces energy consumption for obtaining desired thermal comfort. In the present study, TRNSYS simulation studio project has been developed to perform the simulations of the Desiccant dehumidifier coupled vapor compression hybrid system for different configurations in summer cooling season. Experimental measurements are also carried out to observe the influence of operating parameters on system performance. The obtained results show that the proposed system has ensured a substantial reduction in process air humidity at dehumidifier exit while maintaining the conditioned room comfort.

  • investigations on effect of operational conditions on performance of Solid Desiccant based hybrid cooling system in hot and humid climate
    Thermal science and engineering, 2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract A Solid Desiccant based hybrid system for space cooling application is proposed and analyzed. Performance assessment of the cooling system was carried out with use of experimental test set up during summer cooling season. Performance was evaluated in terms of dehumidifier effectiveness and coefficient of performance of the system. Experimental measurements were carried out at different reactivation temperature for change in ambient conditions. It is found that the regeneration temperature has a substantial effect on the system performance for the regeneration heat supply to reactivate the dehumidifier. Moreover, the obtained result depicts the Solid Desiccant based hybrid cooling system can attain better performance by ensuring its efficacious operation in hot as well as humid conditions to maintain required thermal comfort by ensuring 65.59% reduction in the humidity ratio as compared to that of the outdoor air.

  • a critical review on application of solar energy as renewable regeneration heat source in Solid Desiccant vapor compression hybrid cooling system
    Journal of building engineering, 2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract A review on solar powered Solid Desiccant – vapor compression hybrid cooling system has been carried out. This provides latest information on recent development in air-conditioning and built environment produced by use of hybrid cooling. Use of renewable solar energy can be a good source for regeneration heat provided in reactivating Desiccant dehumidifier used in alternate cooling systems. Desiccant dehumidification assisted vapor-compression based hybrid air-conditioning systems can successfully couple to renewable solar thermal power to dampen electricity use and to conserve environment in place of traditional air-conditioning. The energy saving potential of solar powered Desiccant cooling technologies is illustrated and discussed as compared to the vapor compression based conventional cooling systems. It is found that the Solid Desiccant integrated hybrid cooling systems are favourable than the conventional vapor compression cooling, because it is better means for economical and cleaner air-conditioning. The present review can ameliorate the usefulness of solar energy as renewable regeneration heat source in heat driven Solid Desiccant based hybrid cooling system and helps to guide future investigators to take the research opportunities in this area.

  • application of artificial neural network for predicting performance of Solid Desiccant cooling systems a review
    Renewable & Sustainable Energy Reviews, 2017
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    In present study, an attempt has been made to review the applications of artificial neural network (ANN) for predicting the performance of Solid Desiccant cooling systems. Different types of neural networks are applied to model the Solid Desiccant cooling systems. With use of experimental data, an ANN model was developed which is based on different algorithms. Available experimental data were divided into two categories for training and testing of the ANN model. Later on, trained ANN model was tested for predicting the performance of system based on various input and output parameters such as air stream flow rates, temperatures and humidity ratios, pressure drop, dehumidifier effectiveness, cooling capacity, regeneration temperature, power input, coefficient of performance etc. So, present review proposes the use of ANN based model to simulate the relationship between inlet and outlet parameters of the system. The ANN predictions for these parameters usually agreed with the experimental values with higher correlation co-efficient. The previous studies show that ANNs can be used with a higher precision in guessing the performance of Solid Desiccant cooling systems. This review is useful for making opportunities to further research of ANNs and its feasibility which is becoming common in the coming days.

  • a critical review on Solid Desiccant based hybrid cooling systems
    International Journal of Air-conditioning and Refrigeration, 2017
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    The present review provides scientific and technical support on how Solid Desiccant-based hybrid cooling can be a supplement to the commonly used vapor compression-based traditional air-conditioning systems to provide the indoor thermal comfort to the occupants. The existing design of standalone vapor compression system needs to be modified by integrating it with the Solid Desiccant-based dehumidification system to achieve better performance and economic feasibility by handling humidity and temperature separately especially in case of hot humid conditions. The present study is undertaken by considering variety of aspects including background and need for alternative cooling systems, system configuration as well as operational modes and current status of Desiccant-based hybrid cooling technology. The review work also indicates that the technology of Desiccant-based hybrid cooling has a great potential to provide thermal comfort especially in hot humid climate at the expense of lower energy consumption as compared to traditional cooling systems.

Manish Mishra - One of the best experts on this subject based on the ideXlab platform.

  • investigations on effect of operational conditions on performance of Solid Desiccant based hybrid cooling system in hot and humid climate
    Thermal science and engineering, 2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract A Solid Desiccant based hybrid system for space cooling application is proposed and analyzed. Performance assessment of the cooling system was carried out with use of experimental test set up during summer cooling season. Performance was evaluated in terms of dehumidifier effectiveness and coefficient of performance of the system. Experimental measurements were carried out at different reactivation temperature for change in ambient conditions. It is found that the regeneration temperature has a substantial effect on the system performance for the regeneration heat supply to reactivate the dehumidifier. Moreover, the obtained result depicts the Solid Desiccant based hybrid cooling system can attain better performance by ensuring its efficacious operation in hot as well as humid conditions to maintain required thermal comfort by ensuring 65.59% reduction in the humidity ratio as compared to that of the outdoor air.

  • performance analysis of a Solid Desiccant assisted hybrid space cooling system using trnsys
    Journal of building engineering, 2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract The traditional air conditioners suffer from performance degradation especially in humid conditions. This is due to fact that the excess moisture level in ventilation air considerably increases latent cooling load of the space to be conditioned. The use of Desiccant integrated vapor compression hybrid cooling system can alleviate this problem by controlling the temperature and humidity separately. It also reduces energy consumption for obtaining desired thermal comfort. In the present study, TRNSYS simulation studio project has been developed to perform the simulations of the Desiccant dehumidifier coupled vapor compression hybrid system for different configurations in summer cooling season. Experimental measurements are also carried out to observe the influence of operating parameters on system performance. The obtained results show that the proposed system has ensured a substantial reduction in process air humidity at dehumidifier exit while maintaining the conditioned room comfort.

  • a critical review on application of solar energy as renewable regeneration heat source in Solid Desiccant vapor compression hybrid cooling system
    Journal of building engineering, 2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract A review on solar powered Solid Desiccant – vapor compression hybrid cooling system has been carried out. This provides latest information on recent development in air-conditioning and built environment produced by use of hybrid cooling. Use of renewable solar energy can be a good source for regeneration heat provided in reactivating Desiccant dehumidifier used in alternate cooling systems. Desiccant dehumidification assisted vapor-compression based hybrid air-conditioning systems can successfully couple to renewable solar thermal power to dampen electricity use and to conserve environment in place of traditional air-conditioning. The energy saving potential of solar powered Desiccant cooling technologies is illustrated and discussed as compared to the vapor compression based conventional cooling systems. It is found that the Solid Desiccant integrated hybrid cooling systems are favourable than the conventional vapor compression cooling, because it is better means for economical and cleaner air-conditioning. The present review can ameliorate the usefulness of solar energy as renewable regeneration heat source in heat driven Solid Desiccant based hybrid cooling system and helps to guide future investigators to take the research opportunities in this area.

  • solar assisted Solid Desiccant vapor compression hybrid air conditioning system
    2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Solar assisted Solid Desiccant—vapor compression based hybrid space cooling system for building thermal comfort is made by integrating Desiccant based dehumidification system as well as by use of solar heating system along with conventional VCR system. This is because in humid climates, excessive humidity during summer leading to inefficiencies of conventional cooling devices. Humidity increment in ambient air as well as ventilation requirement suddenly rises the latent load of the space to be cooled. Conventional VCR systems are not effective in handling both temperature and relative humidity of cooling air independently. The application of Solid Desiccant based hybrid cooling systems significantly ameliorates the humidity control irrespective of temperature of supply air. The application of renewable free energy like as use of solar energy for regenerating the Desiccant used in Desiccant wheel helps us to alleviate the major requirement of electric energy needed by conventional VCR air-conditioning system for hot sunny days. So, it ameliorates overall energy efficiency and reduces energy costs. Performance of Solid Desiccant—vapor compression based hybrid building space comfort cooling system has been evaluated during hot and humid period from April to September for the ambient conditions of the Roorkee for various important parameters such as temperatures of supply air, room air and regeneration air etc. Regeneration temperature is one of the most important parameters having the key role in changing the performance of Desiccant based cooling system.

  • application of artificial neural network for predicting performance of Solid Desiccant cooling systems a review
    Renewable & Sustainable Energy Reviews, 2017
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    In present study, an attempt has been made to review the applications of artificial neural network (ANN) for predicting the performance of Solid Desiccant cooling systems. Different types of neural networks are applied to model the Solid Desiccant cooling systems. With use of experimental data, an ANN model was developed which is based on different algorithms. Available experimental data were divided into two categories for training and testing of the ANN model. Later on, trained ANN model was tested for predicting the performance of system based on various input and output parameters such as air stream flow rates, temperatures and humidity ratios, pressure drop, dehumidifier effectiveness, cooling capacity, regeneration temperature, power input, coefficient of performance etc. So, present review proposes the use of ANN based model to simulate the relationship between inlet and outlet parameters of the system. The ANN predictions for these parameters usually agreed with the experimental values with higher correlation co-efficient. The previous studies show that ANNs can be used with a higher precision in guessing the performance of Solid Desiccant cooling systems. This review is useful for making opportunities to further research of ANNs and its feasibility which is becoming common in the coming days.

R Z Wang - One of the best experts on this subject based on the ideXlab platform.

  • a novel semi coupled Solid Desiccant heat pump system part 2 experimental investigation
    International Journal of Refrigeration-revue Internationale Du Froid, 2021
    Co-Authors: T.y. Yang, Y.j. Dai, R Z Wang
    Abstract:

    Abstract A novel semi-coupled Solid Desiccant heat pump (SCSDHP) system, in which a Desiccant coated evaporator (DCE) and a conventional evaporator (CE) operate in series, is proposed to realize high COP and improve thermal comfort. In order to determine the parameters of the heat exchanger and verify the superiority of this system, the simulation model of the system has been established. In this part of study, an experimental setup is built and tested to evaluate performance of SCSDHP system. The results show that the SCSDHP system can supply satisfactory air under the typical ARI conditions. Compared with SDHP system, the supply air temperature is reduced by about 7–8 °C, and the corresponding cooling power is increased by more than 50%. It is noteworthy that the COP of this novel SCSDHP system is still more than 4 which is higher than the traditional vapor compression system. The results also show that this novel system can be applied in a wide range of temperature and humidity, the COP will be higher when applied in higher temperature and humidity ratio.

  • A novel semi-coupled Solid Desiccant heat pump system - Part 1: Simulation study
    International Journal of Refrigeration-revue Internationale Du Froid, 2020
    Co-Authors: T.y. Yang, Y.j. Dai, R Z Wang
    Abstract:

    Abstract Solid Desiccant heat pump system (SDHP) can handle sensible and latent heat load simultaneously with high coefficient of performance (COP). However, in such system, supply air temperature is relatively high and unstable due to the frequent switch between Desiccant coated heat exchanger as evaporator and condenser. In order to overcome these drawbacks, the concept of semi-coupled Solid Desiccant heat pump (SCSDHP) system is proposed in this paper, then a mathematical model is established to investigate the feasibility of this novel system. Calculation shows that under ARI (Air-conditioning and Refrigeration Institute) summer condition silica gel coating with density of 0.25 kg m−2 is optimal, and area ratio between Desiccant coated evaporator and conventional evaporator of 1:1 is recommended. Furthermore, compared with conventional SDHP system, supply air temperature can be 4.5∼7°C lower and the variation range of supply air temperature decreases by 16∼21°C. Also, effects of main operating parameters including the temperature and relative humidity of outdoor air on the performance of SCSDHP system are investigated.

  • theoretical investigation of a novel unitary Solid Desiccant air conditioner
    Science and Technology for the Built Environment, 2017
    Co-Authors: R Z Wang
    Abstract:

    To achieve higher energy efficiency and higher moisture removal capacity, a novel unitary Solid Desiccant air conditioner was proposed for hot and humid climate based on a novel concept of water-sorbing heat exchanger. The so-called water-sorbing heat exchanger is made by coating Desiccants onto the coils used in traditional unitary air conditioners. As such, sensible load will be handled by convective heat transfer without overcooling and latent load will be treated by Desiccants regenerated by heat of condensation. The air leaving the evaporator rightly satisfies the required supply-air. Evaporation temperature will increase and reheating is no longer needed. Condensation temperature will effectively decrease due to the enhancement of airside heat dissipation, which results from adsorbed water evaporating. One simple thermodynamic model was developed with some essential assumptions and the feasibility was theoretically analyzed. Parametric studies were conducted and power saving potentials of unitary so...

  • development and characterization of mesoporous silicate licl composite Desiccants for Solid Desiccant cooling systems
    Industrial & Engineering Chemistry Research, 2015
    Co-Authors: X Zheng, L M Hu, T.s. Ge, R Z Wang
    Abstract:

    Solid composite Desiccants are fabricated by impregnating LiCl into pores of SBA-15 and MCM-41 mesoporous silicates. In the study, characteristics including textural properties and equilibrium and dynamic water sorption were tested and analyzed. Research on nitrogen adsorption suggested that because of the impregnated salt, composite Desiccants were different from pure silicates. Sorption isotherms were measured and simulated based on Polanyi potential theory. Composite samples had water uptake much higher than that of pure hosts under low and middle relative pressure owing to mutual contribution of both physical and chemical sorption. Sorption kinetics were also tested and fitted with a linear driving force model. The composite Desiccant prepared from SBA-15 exhibited higher dynamic sorption quantity and a reasonable diffusion rate constant. Finally, dehumidification performance of the composite Desiccant in a novel Solid Desiccant cooling component was evaluated with a mathematical model. Simulation res...

  • comparison study of a novel Solid Desiccant heat pump system with energyplus
    Building Simulation, 2014
    Co-Authors: Yu Jiang, R Z Wang
    Abstract:

    The variable refrigerant flow (VRF) air conditioning system usually needs to be operated with a ventilation system, since the VRF system cannot provide fresh air. The commonly used ventilation unit with the VRF system is the heat recovery ventilation (HRV) unit due to its merits of energy saving. In this study, a novel Solid Desiccant heat pump unit (DESICA) is introduced and mathematical model of DESICA is developed based on the dynamic building energy simulation software—EnergyPlus. The mathematical model is validated with experimental results. Based on the model, performance comparison study is conducted among the novel joint DESICA and VRF (DES&VRF) system, the conventional joint HRV and VRF (HRV&VRF) system, and the original VRF standalone with ventilation (VRFSA) system in an office building in Shanghai. Simulation results show that, HRV&VRF and VRFSA can handle the sensible load, though both of them cannot well deal with the latent load. On the contrary, DES&VRF system can keep both indoor temperature and humidity ratio at the target value, resulting in the best indoor thermal comfort than the other two systems. In addition, through the whole year, DES&VRF consumes 5% more energy than VRFSA and 20% less energy than HRV&VRF.

P K Sahoo - One of the best experts on this subject based on the ideXlab platform.

  • solar assisted Solid Desiccant vapor compression hybrid air conditioning system
    2018
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Solar assisted Solid Desiccant—vapor compression based hybrid space cooling system for building thermal comfort is made by integrating Desiccant based dehumidification system as well as by use of solar heating system along with conventional VCR system. This is because in humid climates, excessive humidity during summer leading to inefficiencies of conventional cooling devices. Humidity increment in ambient air as well as ventilation requirement suddenly rises the latent load of the space to be cooled. Conventional VCR systems are not effective in handling both temperature and relative humidity of cooling air independently. The application of Solid Desiccant based hybrid cooling systems significantly ameliorates the humidity control irrespective of temperature of supply air. The application of renewable free energy like as use of solar energy for regenerating the Desiccant used in Desiccant wheel helps us to alleviate the major requirement of electric energy needed by conventional VCR air-conditioning system for hot sunny days. So, it ameliorates overall energy efficiency and reduces energy costs. Performance of Solid Desiccant—vapor compression based hybrid building space comfort cooling system has been evaluated during hot and humid period from April to September for the ambient conditions of the Roorkee for various important parameters such as temperatures of supply air, room air and regeneration air etc. Regeneration temperature is one of the most important parameters having the key role in changing the performance of Desiccant based cooling system.

  • experimental investigation on Solid Desiccant vapor compression hybrid air conditioning system in hot and humid weather
    Applied Thermal Engineering, 2016
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract Solid Desiccant–vapor compression hybrid air-conditioning systems are considered as promising alternative to the conventional air conditioning systems because of the independent control of temperature and humidity and being environment friendly. In the present work, performance study of Solid Desiccant vapor compression hybrid air-conditioning system has been experimentally carried out for typical hot and humid weather of Roorkee. The overall system performance has also been evaluated for a cooling season from March to mid of October on the basis of various outdoor conditions. It is found that the hybrid cooling system highlights good performance in hot and humid climatic condition. The present system has ensured 61.7% reduction in process air humidity ratio at the outlet of Desiccant wheel as compared to outdoor humidity ratio. The effect of variations in outdoor temperature on dehumidifier performance is also highlighted. The obtained results also show that the system performance is highly sensitive to the change in outside ambient condition.

  • Solid Desiccant air conditioning a state of the art review
    Renewable & Sustainable Energy Reviews, 2016
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Recently, Solid Desiccant air conditioning system has been proposed as an alternative to the conventional vapor compression refrigeration air conditioning systems for efficient control over humidity of conditioned air especially in hot and humid areas. The Solid Desiccant cooling can be more favorable over the traditional vapor compression refrigeration air conditioners, because it assures more accessible, economical and cleaner air conditioning. It is still more important when it is powered by free energy sources like solar energy and waste heat with temperatures of between 60°C and 80°C. In addition, it can significantly reduce the operating cost as well as save energy. In the present paper, principle of Solid Desiccant cooling system is recalled and its technological applications and advancements are discussed. Through a rigorous literature review, different configurations of Desiccant cooling cycles, conventional and hybrid Desiccant cooling cycles, different types of mathematical models of rotary Desiccant dehumidifier, performance evaluation of Desiccant cooling system, technological improvement and the advantage it can offer in terms of energy and cost savings are highlighted. This paper also gives a detailed account of the general features and performance of the Solid Desiccant cooling system when it is powered by solar energy or industrial waste heat for regenerating the Desiccant. This review is useful for making opportunities to further research of Solid Desiccant cooling system and its feasibility which is becoming common in the coming days.

  • performance analysis of hybrid Solid Desiccant vapor compression air conditioning system in hot and humid weather of india
    Building Services Engineering Research and Technology, 2016
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    The performance of hybrid Solid Desiccant–vapor compression air conditioning system is studied for the typical hot and humid climatic zone of North India (Roorkee). The system consists of a rotary Desiccant dehumidifier coupled with heat recovery wheel and a conventional vapor compression air conditioning system. A FORTRAN program was developed to calculate different psychrometric properties like humidity ratio, dry-bulb temperature, wet-bulb temperature, relative humidity, specific heat, etc. at each state point of the system on the basis of ambient and desired inside room conditions, room cooling load, sensible heat factor, and required air flow rate. The overall system performance has been evaluated in terms of the coefficient of performance and the dehumidifier effectiveness. The influence of variation in ambient conditions on regeneration temperature of Desiccants has also been discussed. The simulated results are validated using experimental measurements. The present system has ensured a reduction o...

  • performance studies of hybrid Solid Desiccant vapor compression air conditioning system for hot and humid climates
    Energy and Buildings, 2015
    Co-Authors: D B Jani, Manish Mishra, P K Sahoo
    Abstract:

    Abstract Suitability of the Solid Desiccant cooling to supplement the conventional vapor compression refrigeration air conditioner has been studied for typical hot and humid climate. A Solid Desiccant and vapor compression hybrid air-conditioning system for a test room of cooling capacity 1.8 kW, has been modelled in simulation studio project and simulated in TRNSYS environment for the cooling season from March to September. The obtained results have been validated against experimental test data. The effects of ambient humidity ratio and temperature on coefficient of performance and supply air temperature have been evaluated. The variation in coefficient of performance has been obtained at various regeneration temperatures. The simulation results show the suitability of such systems for cooling of building in hot and humid climates.