The Experts below are selected from a list of 11790 Experts worldwide ranked by ideXlab platform
D.j. Tidke - One of the best experts on this subject based on the ideXlab platform.
-
Solid desiccant Dehumidification and regeneration methods—A review
Renewable & Sustainable Energy Reviews, 2016Co-Authors: K. S. Rambhad, P. V. Walke, D.j. TidkeAbstract:Desiccant Dehumidification system is an alternate option against conventional Dehumidification system in hot and humid climates. Conventional Dehumidification systems have many drawbacks that include high power consumption and increase the chlorofluorocarbon (CFC) level in the environment and major contribute to depletion of ozone layer. This paper discuss the functioning of Dehumidification, cooling and air-conditioning systems using various solid desiccant with focus on the use of solar energy for Dehumidification of humid air and regeneration of solid desiccant wheel. A comparative study of various Dehumidification, cooling and air-conditioning systems show that solid desiccant has low operating and maintenance cost and is environment friendly.
-
solid desiccant Dehumidification and regeneration methods a review
Renewable & Sustainable Energy Reviews, 2016Co-Authors: K. S. Rambhad, P. V. Walke, D.j. TidkeAbstract:Desiccant Dehumidification system is an alternate option against conventional Dehumidification system in hot and humid climates. Conventional Dehumidification systems have many drawbacks that include high power consumption and increase the chlorofluorocarbon (CFC) level in the environment and major contribute to depletion of ozone layer. This paper discuss the functioning of Dehumidification, cooling and air-conditioning systems using various solid desiccant with focus on the use of solar energy for Dehumidification of humid air and regeneration of solid desiccant wheel. A comparative study of various Dehumidification, cooling and air-conditioning systems show that solid desiccant has low operating and maintenance cost and is environment friendly.
K. S. Rambhad - One of the best experts on this subject based on the ideXlab platform.
-
Solid desiccant Dehumidification and regeneration methods—A review
Renewable & Sustainable Energy Reviews, 2016Co-Authors: K. S. Rambhad, P. V. Walke, D.j. TidkeAbstract:Desiccant Dehumidification system is an alternate option against conventional Dehumidification system in hot and humid climates. Conventional Dehumidification systems have many drawbacks that include high power consumption and increase the chlorofluorocarbon (CFC) level in the environment and major contribute to depletion of ozone layer. This paper discuss the functioning of Dehumidification, cooling and air-conditioning systems using various solid desiccant with focus on the use of solar energy for Dehumidification of humid air and regeneration of solid desiccant wheel. A comparative study of various Dehumidification, cooling and air-conditioning systems show that solid desiccant has low operating and maintenance cost and is environment friendly.
-
solid desiccant Dehumidification and regeneration methods a review
Renewable & Sustainable Energy Reviews, 2016Co-Authors: K. S. Rambhad, P. V. Walke, D.j. TidkeAbstract:Desiccant Dehumidification system is an alternate option against conventional Dehumidification system in hot and humid climates. Conventional Dehumidification systems have many drawbacks that include high power consumption and increase the chlorofluorocarbon (CFC) level in the environment and major contribute to depletion of ozone layer. This paper discuss the functioning of Dehumidification, cooling and air-conditioning systems using various solid desiccant with focus on the use of solar energy for Dehumidification of humid air and regeneration of solid desiccant wheel. A comparative study of various Dehumidification, cooling and air-conditioning systems show that solid desiccant has low operating and maintenance cost and is environment friendly.
Xiaosong Zhang - One of the best experts on this subject based on the ideXlab platform.
-
recent advancements in liquid desiccant Dehumidification technology
Renewable & Sustainable Energy Reviews, 2014Co-Authors: Junfei Qian, Xiaosong ZhangAbstract:Liquid desiccant Dehumidification technology is becoming increasingly attractive due to its high efficient utilization of low-grade heat and its effectiveness in Dehumidification. Using this technology, energy-efficient air conditioning systems have been developed, which demonstrated superiority over the traditional vapor compression type system by allowing both temperature and humidity to be controlled independently. This paper presented a state-of-the-art review of the research and development in this field, covering the topics of heat and mass transfer models, performance evaluation of liquid desiccant Dehumidification and regeneration, and technology development of dehumidifiers and regenerators as the most important components of liquid desiccant systems. Meanwhile, many detailed systems using solar energy in desiccant cooling was reported, and some new applications of liquid desiccant Dehumidification were also introduced.
-
A kinetic mass transfer model of liquid Dehumidification for liquid desiccant cooling system
Energy and Buildings, 2013Co-Authors: Xiu-wei Li, Xiaosong Zhang, Fang WangAbstract:Abstract Liquid desiccant cooling system (LDCS) is an alternative air-conditioning system with promising energy-saving potential. To further explore the potential of LDCS, it is important to reveal the mass transfer mechanism of Dehumidification process. The classical mass transfer model does well in theoretical analysis, but failed to explain the Dehumidification reverse phenomenon in experiments. Therefore, this paper proposes a mass transfer model based on the kinetic theory for improvement. Through theoretical and experimental research, it proves the new model clearly describes the Dehumidification mechanism and did better in predicting the Dehumidification reverse phenomenon. This paper also gives a method through which we can get some important parameters of the new model from the mass transfer coefficient of the classical model.
Xiaoyi Chen - One of the best experts on this subject based on the ideXlab platform.
-
simulation and experimental studies on the liquid desiccant Dehumidification of horizontal tubes having a staggered arrangement
Journal of building engineering, 2020Co-Authors: Daqing Kuang, Shizheng Wang, Xiaoyi ChenAbstract:Abstract Field synergy theory has been widely used in the field of single-phase heat transfer, which is of importance to heat transfer optimization. However, few scholars apply the field synergy theory to the field of mass transfer, especially to the field of liquid desiccant Dehumidification. The innovation of this paper is the application of the technology of the falling-film evaporation of a horizontal tube and the theory of field synergy to liquid desiccant Dehumidification. The objective of this paper is to study the falling film liquid dehumidifier and get the Dehumidification performance and mass transfer synergy angle under the influence of multiple factors. The heat and mass transfer characteristics of the system are studied in simulation and experimentally. The mass transfer synergy angle comprising the velocity vector and concentration gradient vector is taken as a standard to measure the mass transfer synergy, while the moisture content of the outlet air is taken as a standard to measure the Dehumidification performance of the system. Fluent simulation software is used to simulate the Dehumidification process of the equipment with staggered horizontal pipes, establish physical and mathematical models and analyze the velocity field and moisture content field in the model. The moisture content of the outlet air and the distribution of the mass transfer angle are obtained. The mass transfer angle of the system is about 96°. The effects of various factors on the air moisture content at the outlet of the equipment are studied experimentally. Results show that the Dehumidification amount decreases with an increase in air velocity. Increases in the solution concentration, air inlet moisture content and solution flow rate increase the amount of Dehumidification, following the same trends as in simulation. A comparison of the simulation results with the experimental results shows the relative error is within 20%. This study shows that it is feasible to combine the field synergy theory with liquid desiccant Dehumidification. On the basis of this study, researchers in related fields can further study the effect of mass transfer synergy angle on mass transfer synergy in liquid desiccant Dehumidification system.
Ruzhu Wang - One of the best experts on this subject based on the ideXlab platform.
-
On the dimensional analysis of a cross-flow flat-plate membrane liquid desiccant dehumidifier
Energy Procedia, 2019Co-Authors: Si-min Huang, Ruzhu Wang, Kian Jon ChuaAbstract:Abstract The membrane liquid desiccant Dehumidification has been proposed to resolve the carry-over problem of the conventional liquid desiccant dehumidifiers (e.g. packed-bed, spray chamber, etc.). Many earlier studies have been devoted to developing different types of membranes and investigating the operating conditions to achieve sufficient Dehumidification performance. However, the key governing factors that control the Dehumidification process have never been explored and their impacts remain uncertain. In this paper, a dimensional analysis of the cross-flow flat-plate membrane liquid desiccant dehumidifier is carried out to promote in-depth understanding of the fundamental Dehumidification process and to investigate its dominant physical mechanism. A membrane liquid desiccant dehumidifier prototype has been developed and tested under different conditions. A 3-D CFD model is formulated to predict the heat and mass transfer performance of the dehumidifier, and its dimensionless form is developed via an appropriate scaling analysis. The relative importance of the relevant dimensionless groups in the Dehumidification process is discussed, and correlations are developed to predict and optimize the dehumidified air conditions.
-
Review on substrate of solid desiccant Dehumidification system
Renewable & Sustainable Energy Reviews, 2018Co-Authors: Xiaoni Wu, T.s. Ge, Ruzhu WangAbstract:Desiccant wheel Dehumidification air conditioning system makes full use of the principle of desiccant Dehumidification and evaporative cooling. Besides desiccant material, the substrate also plays an important role in improving the Dehumidification performance of a rotary desiccant wheel. The objective of this paper is to present the state of the art of substrate, and then provide guidelines for the choice and further research work of substrate. It is found that the substrate of a rotary desiccant wheel usually is porous ceramic fiber paper or glass fiber paper. To improve the Dehumidification capacity of rotary desiccant wheel Dehumidification system, substrate with high porosity and high thermal conductivity should be selected. Taking into account both Dehumidification capacity and pressure drop, sinusoidal air channel is a good choice for rotary desiccant wheel. The review of non-rotary solid desiccant Dehumidification system reveals that substrate plays an important role in Dehumidification processing and porous fiber paper is the best choice for substrate of rotary desiccant wheel. Short service life and poor adsorption performance are the main drawbacks of existing desiccant wheels. The match for substrates and desiccant materials has not been understood deeply. In the future, revealing the nature of the effect of substrate on the Dehumidification performance may be the main work to fill in these blanks.
-
Experimental investigations on desiccant wheels
Applied Thermal Engineering, 2012Co-Authors: Ursula Eicker, Uwe Schürger, Max Köhler, T.s. Ge, Hui Li, Ruzhu WangAbstract:Abstract Experimental investigations on several commercially available and newly fabricated rotors are conducted in two different laboratories to evaluate performance trends. Experimental uncertainties are analysed and the parameters determining the rotor performance are investigated. It is found that the optimal rotation speed is lower for lithium chloride or compound rotors than for silica gel rotors. Higher regeneration air temperatures lead to higher Dehumidification potentials at almost equal Dehumidification efficiencies, but with increasing regeneration specific heat input and enthalpy changes of the process air. The influence of the regeneration air humidity was also notable and low relative humidities increase the Dehumidification potential. Finally, the measurements show that rising water content in the ambient air causes the Dehumidification capacity to rise, while the Dehumidification efficiency is not much affected and both specific regeneration heat input and latent heat change of the process air decrease. For desiccant cooling applications in humid climates this is a positive trend.