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Maurizio Sasso - One of the best experts on this subject based on the ideXlab platform.
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desiccant based ahu interacting with a cpvt collector simulation of energy and environmental performance
Solar Energy, 2014Co-Authors: Francesco Calise, Maurizio Sasso, Carlo Roselli, Dentice M Daccadia, Francesco TarielloAbstract:Abstract Desiccant-based Air Handling Units (AHU) provide significant technical and energy/environmental advantages with respect to conventional systems, especially when the regeneration of the desiccant material is obtained by means of a renewable energy source, such as solar energy. Such thermal energy may be provided by CPVT (Concentrating Photovoltaic/Thermal) collectors, simultaneously producing also electricity, which are considered one of the most promising solar technologies. In fact, CPVT thermal energy can drive (integrated by a natural-gas fired boiler) a desiccant-based AHU, since the silica-gel wheel, used for the dehumidification and included in that system, must be continuously regenerated. Here, the regeneration temperature of the wheel (40–70 °C, depending on the dehumidification required) is compatible with the CPVT outlet temperature (80–100 °C). Simultaneously, the electricity produced by CPVT collectors can feed the auxiliary devices of the plant. Furthermore, the heat supplied from the solar collector can be used for the pre and post heating of the Process Air during winter operation. A test facility in which a silica-gel desiccant wheel is included in a hybrid AHU has been located in Benevento (Southern Italy). In this paper, a desiccant-based AHU has been coupled with a novel CPVT, consisting of a parabolic trough concentrator and a linear triangular receiver. In order to analyze the system, a TRNSYS project based on models available in literature (some of them were calibrated and validated with experimental tests) has also been developed. Electricity produced by the CPVT collector is used to power the auxiliaries of the AHU, the chiller and also to balance the electric load of users, while thermal energy is used to heat the regeneration Air flow during the summer period and the Process Air in the winter. Electricity in excess is sold to the grid, whereas the thermal energy in excess is used for production of domestic hot water (DHW). Eventual integrations of electricity and thermal energy are provided by the electric grid and by a gas-fired bolier, respectively. Energy and environmental performance of the overall system in terms of Primary Energy Saving and emission reduction with respect to a reference case are evaluated. The heat provided by the CPVT covers about 60% of thermal energy required by regeneration Air and 30% of Process Air in winter operating mode. On an annual basis, the analyzed system obtains a Primary Energy Saving between 81% and 89%, depending on the DHW required.
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Experimental analysis of an unconventional desiccant-based Air-conditioning system: the influence of cooling Air flow and chiller on the energy and environmental performance
International Journal of Low-carbon Technologies, 2013Co-Authors: Giovanni Angrisani, Francesco Minichiello, Maurizio SassoAbstract:Nowadays, the increasing demand of summer cooling is typically covered by electric chillers, often determining electric peak loads and black-outs. Thus, a wide interest is spreading in small scale natural gas-fired cogenerators driving desiccant-based Air-conditioning systems, which represent interesting alternatives to conventional systems based on vapor compression cooling only. In this article, experimental tests performed on an Air handling unit (AHU) equipped with a desiccant wheel (DW), coupled to a small scale cogenerator and an electric chiller are described. A new layout of the desiccant-based AHU is investigated, considering a third flow (the cooling Air), besides the Process Air flow and the regeneration one. A cross-flow heat exchanger between Process Air and cooling Air is used; the cooling Air, cooled by an adiabatic humidifier, is aimed to precool the Process Air exiting the DW. The relevant influence of the heat exchanger and of the humidifier, as well as that of the chiller performance, on global primary energy requirements, water consumption and CO2 equivalent emissions of the system is experimentally evaluated.
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Effect of rotational speed on the performances of a desiccant wheel
Applied Energy, 2013Co-Authors: Giovanni Angrisani, Carlo Roselli, Maurizio SassoAbstract:In recent years, the boost towards the reduction of electrical loads for Air conditioning and the decentralization of energy conversion devices are determining an increasing interest in small scale trigeneration systems fueled by natural gas (“gas cooling”), able to shift energy demand in summer from electricity to gas, at the same time allowing the exploitation of natural gas surplus during the warm season. A technology that meets these requirements is represented by desiccant-based dehumidification systems, in which thermal energy for regeneration can be provided by a small scale cogenerator; the main component of these systems is the desiccant wheel, whose performances, in terms of humidity reduction and Process Air outlet temperature, depend on several operational parameters. The rotational speed of the desiccant wheel is widely recognized as a crucial parameter: if the wheel rotates too fast, the desiccant material does not have enough time to remove the moisture, while if the wheel rotates too slowly, saturation could occur. As a result, there must exist an optimal rotational speed, depending on the operating conditions, that guarantees the best dehumidification performance. Rotational velocity of the desiccant wheel influences the Process Air temperature exiting the desiccant wheel too; therefore it should be chosen in order to contemporary obtain a high dehumidification performance and an enough low outlet temperature, to reduce the cooling load on the cooling device, in particular if a conventional vapor compression chiller is used, as often occurs in high humidity climates. In this paper, experimental tests on a silica gel desiccant wheel, in order to highlight the effect of rotational speed on its performance, are shown. The adsorbent material is regenerated by thermal energy up to 65°C. The experimental results were used to calculate some of the most representative performance parameters for the wheel, that are the dehumidification effectiveness, the dehumidification coefficient of performance (DCOP) and the sensible energy ratio (SER). Finally, the influence of Process Air inlet temperature and humidity, regeneration temperature and the ratio between the regeneration and Process Air flow rates on the optimal rotational velocity is discussed. It was found that, for the analyzed desiccant wheel, the velocity that optimizes the dehumidification performances varies in the range 5–10 revolutions per hour, depending on operating conditions, while SER monotonically increases with rotational velocity.
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experimental analysis on the dehumidification and thermal performance of a desiccant wheel
Applied Energy, 2012Co-Authors: Giovanni Angrisani, Francesco Minichiello, Carlo Roselli, Maurizio SassoAbstract:Abstract The advantages of desiccant-based Air conditioning systems, compared to conventional ones based on the dehumidification by cooling, have been highlighted in many research papers. The energy saving and the reduction of the environmental impact are higher when the desiccant material is regenerated by using “free” thermal energy (for example, waste heat from cogenerators or solar energy). Further investigation on the performance of the desiccant wheel is useful: therefore, in this paper, an experimental analysis on this component is presented, with particular attention to the variation of the performance as a function of the Process and regeneration Air flow rates. The desiccant material is regenerated by means of low-temperature thermal energy (about 65 °C) from a microcogenerator. Both the experimental results obtained by the authors and the data provided by the manufacturer have been used to calculate some performance parameters, and a satisfactory agreement has been obtained. The performance parameters have been evaluated as a function of the regeneration temperature, the inlet Process Air humidity ratio and temperature and the ratio between the regeneration and Process Air flow rates, in both the cases of fixed regeneration temperature and fixed regeneration thermal power: the results show that higher influence on the dehumidification Process is due to the regeneration temperature rather than to the regeneration Air flow rate. Moreover, the Process Air humidity ratio and regeneration temperature influence the desiccant wheel performance more than the Process Air temperature.
Avadhesh Yadav - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigation of solar driven desiccant Air conditioning system based on silica gel coated heat exchanger.
International Journal of Refrigeration, 2016Co-Authors: Amit Kumar, Avadhesh YadavAbstract:Abstract A silica gel coated heat exchanger based Air conditioning system driven by the evacuated tube solar water heater has been experimentally investigated. The system has been operated for two different modes namely cooling with dehumidification mode and heating with humidification mode in summer and winter season respectively. The system performance is analyzed in terms of regeneration rate, dehumidification rate and thermal coefficient of performance (COPth). Experimental results demonstrated that, for cooling and dehumidification mode, the Process Air is cooled by an average temperature of 8.5 °C. A better dehumidification rate can be achieved by using pre-cooling before dehumidification Process. Post-cooling after dehumidification Process is found to be advantageous for cooling capacity and COPth. For heating with humidification mode, the Process Air is heated by an average temperature of 13.3 °C with an average increment in humidity ratio of 1.9 g/kg. It is found that the average COPth of the system is 0.45 and 0.87 for cooling and heating mode respectively.
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Design and operating parameter analysis to improve the performance of solar desiccant wheel using a mathematical model: part-II
International Journal of Renewable Energy Technology, 2014Co-Authors: Avadhesh Yadav, V.k. BajpaiAbstract:A mathematical model has been used to predicting the design and operating parameter of desiccant wheel for performance analysis of desiccant wheel. Model considered both gas and solid side resistance. The model shows good agreement with experimental data. It was found that the moisture removal and temperature difference of the Process Air increases with increasing Process inlet moisture, regeneration temperature, regeneration inlet velocity and these decreases with increasing Process/regeneration area ratio, Process inlet velocity, Process inlet temperature and regeneration inlet moisture. For the best moisture removal, the rotational speed must lie in the range of 15 to 25 rph.
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Operating parameter analysis to improve the performance of solar desiccant wheel using a mathematical model: Part 1
International Journal of Renewable Energy Technology, 2013Co-Authors: Avadhesh Yadav, V.k. BajpaiAbstract:A mathematical model for analysis of various operating parameters to improve the performance of desiccant wheel has been used and heat and mass transfer for both moist Air and the desiccant material have been considered. An experimental setup is fabricated using the evacuated tube solar Air collector with desiccant wheel. The hot Air needed for regeneration is produced by evacuated tube solar Air collector, which has collector surface area of 4.44 m2. The regeneration can be started from 40°C. The temperature of outlet Air is obtained in the range of 40–65°C by this evacuated tube solar Air collector. The experimental results are used to validate the mathematical model with good agreement. The effects of velocity of the regeneration Air and the Process Air have been studied and it was found that moisture removal of desiccant wheel increases with increase in regeneration Air velocity and decrease with increase in Process Air velocity. On the basis of obtained results, the following recommendations have bee...
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Operating parameter analysis to improve the performance of solar desiccant wheel using a mathematical model: Part 1
International Journal of Renewable Energy Technology, 2013Co-Authors: Avadhesh Yadav, V.k. BajpaiAbstract:A mathematical model for analysis of various operating parameters to improve the performance of desiccant wheel has been used and heat and mass transfer for both moist Air and the desiccant material have been considered. An experimental setup is fabricated using the evacuated tube solar Air collector with desiccant wheel. The hot Air needed for regeneration is produced by evacuated tube solar Air collector, which has collector surface area of 4.44 m2. The regeneration can be started from 40°C. The temperature of outlet Air is obtained in the range of 40–65°C by this evacuated tube solar Air collector. The experimental results are used to validate the mathematical model with good agreement. The effects of velocity of the regeneration Air and the Process Air have been studied and it was found that moisture removal of desiccant wheel increases with increase in regeneration Air velocity and decrease with increase in Process Air velocity. On the basis of obtained results, the following recommendations have been made: velocity of the Process Air is between 1 m/s and 2.5 m/s and the regeneration Air is between 3 m/s and 5 m/s. These results are useful to study and analyse of solid desiccant dehumidification systems.
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Numerical and experimental investigation of operating parameters of solar–powered desiccant wheel in India
Heat Transfer Research, 2012Co-Authors: Avadhesh Yadav, V.k. BajpaiAbstract:A mathematical model has been used to predict the operating parameters of a desiccant wheel for performance analysis of the desiccant wheel. The model considered both gas and solid side resistance. The model shows a good agreement with experimental data. An experimental setup was fabricated using an evacuated tube solar Air collector with a desiccant wheel. The hot Air needed for regeneration is produced by the evacuated tube solar Air collector, which has a collector surface area of 4.44 m2 . The regeneration can be started from 40 °C. The temperature of outlet Air obtained is in the range of 40–65 °C in this evacuated tube solar Air collector. The experimental setup was installed at NIT Kurukshetra, India, 29° 58′ (latitude) North and 76° 53′ (longitude) East. Numerical results showed that both the moisture removal and the temperature increment of the Process Air increases with an increasing regeneration Air temperature, regeneration Air inlet velocity, and Process inlet moisture. But both the moisture removal and the temperature increment of the Processed Air decreases by increasing the Process Air inlet velocity and regeneration Air moisture at the inlet. © 2012 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley Online Library (wileyonlinelibrary.com/journal/htj). DOI 10.1002/htj.21031
Giovanni Angrisani - One of the best experts on this subject based on the ideXlab platform.
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study of purge angle effects on the desiccant wheel performance
Energy Conversion and Management, 2017Co-Authors: Giovanni Angrisani, Mohsen Ali Mandegari, Somayeh Farzad, Hassan PahlavanzadehAbstract:Desiccant cooling systems are spreading as a promising technology to reduce the energy consumption and environmental impact of conventional electric driven vapour compression systems for Air conditioning purposes. Desiccant wheels (DWs) are the key component of the desiccant cooling systems which have received substantial attention. Desiccant Wheel if equipped with a purge section will show better performance, however in most cases purge section is not considered or a fixed purge angle is assumed. In this study, analysis of the purge angle effects on energy and dehumidification performances of DW is carried out and a novel optimal purge angle definition is introduced. A mathematical model is developed and validated in order to model the coupled heat and mass transfer Processes in a DW. In addition, the effect of Process and regeneration Air velocities, regeneration Air temperature, rotational speed, desiccant layer thickness, channel length (DW length) and channel hydraulic diameter on the purge angle are studied. The results showed that purge angle is a function of outlet Air humidity profile, while the Process Air velocity as an operating parameter and channel length as a design parameter presented the most substantial effect on the profile. Furthermore, implementation of the optimal purge angle, improves the DW coefficient performance (DCOP) and results in desired conditions of outlet Process Air without the necessity of substantial increase in the DW size.
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Experimental analysis of an unconventional desiccant-based Air-conditioning system: the influence of cooling Air flow and chiller on the energy and environmental performance
International Journal of Low-carbon Technologies, 2013Co-Authors: Giovanni Angrisani, Francesco Minichiello, Maurizio SassoAbstract:Nowadays, the increasing demand of summer cooling is typically covered by electric chillers, often determining electric peak loads and black-outs. Thus, a wide interest is spreading in small scale natural gas-fired cogenerators driving desiccant-based Air-conditioning systems, which represent interesting alternatives to conventional systems based on vapor compression cooling only. In this article, experimental tests performed on an Air handling unit (AHU) equipped with a desiccant wheel (DW), coupled to a small scale cogenerator and an electric chiller are described. A new layout of the desiccant-based AHU is investigated, considering a third flow (the cooling Air), besides the Process Air flow and the regeneration one. A cross-flow heat exchanger between Process Air and cooling Air is used; the cooling Air, cooled by an adiabatic humidifier, is aimed to precool the Process Air exiting the DW. The relevant influence of the heat exchanger and of the humidifier, as well as that of the chiller performance, on global primary energy requirements, water consumption and CO2 equivalent emissions of the system is experimentally evaluated.
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Effect of rotational speed on the performances of a desiccant wheel
Applied Energy, 2013Co-Authors: Giovanni Angrisani, Carlo Roselli, Maurizio SassoAbstract:In recent years, the boost towards the reduction of electrical loads for Air conditioning and the decentralization of energy conversion devices are determining an increasing interest in small scale trigeneration systems fueled by natural gas (“gas cooling”), able to shift energy demand in summer from electricity to gas, at the same time allowing the exploitation of natural gas surplus during the warm season. A technology that meets these requirements is represented by desiccant-based dehumidification systems, in which thermal energy for regeneration can be provided by a small scale cogenerator; the main component of these systems is the desiccant wheel, whose performances, in terms of humidity reduction and Process Air outlet temperature, depend on several operational parameters. The rotational speed of the desiccant wheel is widely recognized as a crucial parameter: if the wheel rotates too fast, the desiccant material does not have enough time to remove the moisture, while if the wheel rotates too slowly, saturation could occur. As a result, there must exist an optimal rotational speed, depending on the operating conditions, that guarantees the best dehumidification performance. Rotational velocity of the desiccant wheel influences the Process Air temperature exiting the desiccant wheel too; therefore it should be chosen in order to contemporary obtain a high dehumidification performance and an enough low outlet temperature, to reduce the cooling load on the cooling device, in particular if a conventional vapor compression chiller is used, as often occurs in high humidity climates. In this paper, experimental tests on a silica gel desiccant wheel, in order to highlight the effect of rotational speed on its performance, are shown. The adsorbent material is regenerated by thermal energy up to 65°C. The experimental results were used to calculate some of the most representative performance parameters for the wheel, that are the dehumidification effectiveness, the dehumidification coefficient of performance (DCOP) and the sensible energy ratio (SER). Finally, the influence of Process Air inlet temperature and humidity, regeneration temperature and the ratio between the regeneration and Process Air flow rates on the optimal rotational velocity is discussed. It was found that, for the analyzed desiccant wheel, the velocity that optimizes the dehumidification performances varies in the range 5–10 revolutions per hour, depending on operating conditions, while SER monotonically increases with rotational velocity.
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experimental analysis on the dehumidification and thermal performance of a desiccant wheel
Applied Energy, 2012Co-Authors: Giovanni Angrisani, Francesco Minichiello, Carlo Roselli, Maurizio SassoAbstract:Abstract The advantages of desiccant-based Air conditioning systems, compared to conventional ones based on the dehumidification by cooling, have been highlighted in many research papers. The energy saving and the reduction of the environmental impact are higher when the desiccant material is regenerated by using “free” thermal energy (for example, waste heat from cogenerators or solar energy). Further investigation on the performance of the desiccant wheel is useful: therefore, in this paper, an experimental analysis on this component is presented, with particular attention to the variation of the performance as a function of the Process and regeneration Air flow rates. The desiccant material is regenerated by means of low-temperature thermal energy (about 65 °C) from a microcogenerator. Both the experimental results obtained by the authors and the data provided by the manufacturer have been used to calculate some performance parameters, and a satisfactory agreement has been obtained. The performance parameters have been evaluated as a function of the regeneration temperature, the inlet Process Air humidity ratio and temperature and the ratio between the regeneration and Process Air flow rates, in both the cases of fixed regeneration temperature and fixed regeneration thermal power: the results show that higher influence on the dehumidification Process is due to the regeneration temperature rather than to the regeneration Air flow rate. Moreover, the Process Air humidity ratio and regeneration temperature influence the desiccant wheel performance more than the Process Air temperature.
William M. Worek - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of rotary dehumidifier performance with and without heated purge
International Communications in Heat and Mass Transfer, 2007Co-Authors: Mihajlo Golubovic, H.d. Madhawa Hettiarachchi, William M. WorekAbstract:Abstract In this paper we evaluate the potential benefits from separating Process Air stream at the exit of rotary dehumidifier into two streams. One Air stream, hot and humid, is called purge Air stream and other is remaining Process Air stream. The remaining Process Air stream has a lower temperature and humidity ratio as result of separation of initial hot Process Air stream. It is found that as the purge angle increases the exit humidity ratio of remaining Process Air stream decreases up to a point where it reaches a minimum. The purge angle for which this occurs is named “effective purge angle”. The effective purge angles for different splits between adsorption and desorption side of the rotary dehumidifier, various regeneration temperatures, non-dimensional lengths and their corresponding optimum non-dimensional times are determined. An existing finite-difference model, developed by the authors of this paper, for simulation of desiccant wheel performance is extended to account for the separation of the Process Air stream at the exit of rotary dehumidifier and later mixing of purge Air stream and outside Air to form the regeneration Air stream. The performance of desiccant wheel with heated “effective purge angle” is evaluated and compared with performance of the same wheel without purge angle at all. It is found, for all cases considered in this study, that having heated “effective purge angle” has overall positive effect on the performance of the rotary dehumidifier.
Carlo Roselli - One of the best experts on this subject based on the ideXlab platform.
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desiccant based ahu interacting with a cpvt collector simulation of energy and environmental performance
Solar Energy, 2014Co-Authors: Francesco Calise, Maurizio Sasso, Carlo Roselli, Dentice M Daccadia, Francesco TarielloAbstract:Abstract Desiccant-based Air Handling Units (AHU) provide significant technical and energy/environmental advantages with respect to conventional systems, especially when the regeneration of the desiccant material is obtained by means of a renewable energy source, such as solar energy. Such thermal energy may be provided by CPVT (Concentrating Photovoltaic/Thermal) collectors, simultaneously producing also electricity, which are considered one of the most promising solar technologies. In fact, CPVT thermal energy can drive (integrated by a natural-gas fired boiler) a desiccant-based AHU, since the silica-gel wheel, used for the dehumidification and included in that system, must be continuously regenerated. Here, the regeneration temperature of the wheel (40–70 °C, depending on the dehumidification required) is compatible with the CPVT outlet temperature (80–100 °C). Simultaneously, the electricity produced by CPVT collectors can feed the auxiliary devices of the plant. Furthermore, the heat supplied from the solar collector can be used for the pre and post heating of the Process Air during winter operation. A test facility in which a silica-gel desiccant wheel is included in a hybrid AHU has been located in Benevento (Southern Italy). In this paper, a desiccant-based AHU has been coupled with a novel CPVT, consisting of a parabolic trough concentrator and a linear triangular receiver. In order to analyze the system, a TRNSYS project based on models available in literature (some of them were calibrated and validated with experimental tests) has also been developed. Electricity produced by the CPVT collector is used to power the auxiliaries of the AHU, the chiller and also to balance the electric load of users, while thermal energy is used to heat the regeneration Air flow during the summer period and the Process Air in the winter. Electricity in excess is sold to the grid, whereas the thermal energy in excess is used for production of domestic hot water (DHW). Eventual integrations of electricity and thermal energy are provided by the electric grid and by a gas-fired bolier, respectively. Energy and environmental performance of the overall system in terms of Primary Energy Saving and emission reduction with respect to a reference case are evaluated. The heat provided by the CPVT covers about 60% of thermal energy required by regeneration Air and 30% of Process Air in winter operating mode. On an annual basis, the analyzed system obtains a Primary Energy Saving between 81% and 89%, depending on the DHW required.
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Effect of rotational speed on the performances of a desiccant wheel
Applied Energy, 2013Co-Authors: Giovanni Angrisani, Carlo Roselli, Maurizio SassoAbstract:In recent years, the boost towards the reduction of electrical loads for Air conditioning and the decentralization of energy conversion devices are determining an increasing interest in small scale trigeneration systems fueled by natural gas (“gas cooling”), able to shift energy demand in summer from electricity to gas, at the same time allowing the exploitation of natural gas surplus during the warm season. A technology that meets these requirements is represented by desiccant-based dehumidification systems, in which thermal energy for regeneration can be provided by a small scale cogenerator; the main component of these systems is the desiccant wheel, whose performances, in terms of humidity reduction and Process Air outlet temperature, depend on several operational parameters. The rotational speed of the desiccant wheel is widely recognized as a crucial parameter: if the wheel rotates too fast, the desiccant material does not have enough time to remove the moisture, while if the wheel rotates too slowly, saturation could occur. As a result, there must exist an optimal rotational speed, depending on the operating conditions, that guarantees the best dehumidification performance. Rotational velocity of the desiccant wheel influences the Process Air temperature exiting the desiccant wheel too; therefore it should be chosen in order to contemporary obtain a high dehumidification performance and an enough low outlet temperature, to reduce the cooling load on the cooling device, in particular if a conventional vapor compression chiller is used, as often occurs in high humidity climates. In this paper, experimental tests on a silica gel desiccant wheel, in order to highlight the effect of rotational speed on its performance, are shown. The adsorbent material is regenerated by thermal energy up to 65°C. The experimental results were used to calculate some of the most representative performance parameters for the wheel, that are the dehumidification effectiveness, the dehumidification coefficient of performance (DCOP) and the sensible energy ratio (SER). Finally, the influence of Process Air inlet temperature and humidity, regeneration temperature and the ratio between the regeneration and Process Air flow rates on the optimal rotational velocity is discussed. It was found that, for the analyzed desiccant wheel, the velocity that optimizes the dehumidification performances varies in the range 5–10 revolutions per hour, depending on operating conditions, while SER monotonically increases with rotational velocity.
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experimental analysis on the dehumidification and thermal performance of a desiccant wheel
Applied Energy, 2012Co-Authors: Giovanni Angrisani, Francesco Minichiello, Carlo Roselli, Maurizio SassoAbstract:Abstract The advantages of desiccant-based Air conditioning systems, compared to conventional ones based on the dehumidification by cooling, have been highlighted in many research papers. The energy saving and the reduction of the environmental impact are higher when the desiccant material is regenerated by using “free” thermal energy (for example, waste heat from cogenerators or solar energy). Further investigation on the performance of the desiccant wheel is useful: therefore, in this paper, an experimental analysis on this component is presented, with particular attention to the variation of the performance as a function of the Process and regeneration Air flow rates. The desiccant material is regenerated by means of low-temperature thermal energy (about 65 °C) from a microcogenerator. Both the experimental results obtained by the authors and the data provided by the manufacturer have been used to calculate some performance parameters, and a satisfactory agreement has been obtained. The performance parameters have been evaluated as a function of the regeneration temperature, the inlet Process Air humidity ratio and temperature and the ratio between the regeneration and Process Air flow rates, in both the cases of fixed regeneration temperature and fixed regeneration thermal power: the results show that higher influence on the dehumidification Process is due to the regeneration temperature rather than to the regeneration Air flow rate. Moreover, the Process Air humidity ratio and regeneration temperature influence the desiccant wheel performance more than the Process Air temperature.