Potential of a desiccant-evaporative cooling system performance in a multi-climate country

Abstract In this paper, a desiccant-evaporative cooling system introduced and applied to a Ventilation and Makeup mode operating cycle. Desiccant part of hybrid cooling system is a heat driven component and effective in area where the use of thermal energy is more economical than electrical power. First, mathematical model of desiccant component based on transient and coupled heat and mass transfer derived. Then the hybrid system model applied to predict the system performance under various operational conditions. The numerical results validated using experimental measurements. The effects of various outdoor design conditions on COP and output of hybrid cycle temperature presented in contour plot forms. Based on these contour plots, COP and output cycle temperature can easily obtain under various ambient conditions. In addition, the potential of presented hybrid desiccant-evaporative cooling system to provide thermal comfort in various outdoor design conditions evaluated and compared with direct and direct–indirect evaporative cooler. The results show these systems are more effective than direct and direct–indirect evaporative cooling systems and provide a better thermal comfort even in hot and humid area. Moreover, introduced systems successfully provide better thermal comfort condition in a multi-climate country (Iran) especially in the area where the evaporative coolers are not applicable.

[1]  William M. Worek,et al.  NUMERICAL SIMULATION OF COMBINED HEAT AND MASS TRANSFER PROCESSES IN A ROTARY DEHUMIDIFIER , 1993 .

[2]  Francesco Minichiello,et al.  Desiccant HVAC systems for commercial buildings , 2002 .

[3]  Clive B. Beggs,et al.  The potential for solar powered single-stage desiccant cooling in southern Europe , 2002 .

[4]  T. Miyazaki,et al.  Performance analysis of air cycle refrigerator integrated desiccant system for cooling and dehumidifying warehouse , 2008 .

[5]  J. Watt,et al.  Evaporative Air Conditioning Handbook , 1986 .

[6]  Akio Kodama,et al.  The use of psychrometric charts for the optimisation of a thermal swing desiccant wheel , 2001 .

[7]  J. Costa,et al.  Influence of the atmospheric pressure on the mass transfer rate of desiccant wheels. , 2011 .

[8]  Ahmad Pesaran,et al.  Moisture transport in silica gel packed beds—I.Theoretical study , 1987 .

[9]  Dae-Young Lee,et al.  Effect of desiccant isotherm on the performance of desiccant wheel , 2009 .

[10]  Ruzhu Wang,et al.  Use of compound desiccant to develop high performance desiccant cooling system , 2007 .

[11]  Stefano De Antonellis,et al.  Simulation, performance analysis and optimization of desiccant wheels , 2010 .

[12]  Takao Kashiwagi,et al.  Analysis of an air cycle refrigerator driving air conditioning system integrated desiccant system , 2006 .

[13]  J. Costa,et al.  Numerical study of the influence of the atmospheric pressure on the heat and mass transfer rates of desiccant wheels , 2011 .

[14]  Kiyoshi Saito,et al.  Performance analysis of four-partition desiccant wheel and hybrid dehumidification air-conditioning system. , 2010 .

[15]  J. Niu,et al.  Performance comparisons of desiccant wheels for air dehumidification and enthalpy recovery , 2002 .

[16]  Samuel D. Conte,et al.  Elementary Numerical Analysis , 1980 .

[17]  Clive B. Beggs,et al.  The use of solar desiccant cooling in the UK: a feasibility study , 2002 .

[18]  William M. Worek,et al.  Analysis of heat and mass transfer in porous sorbents used in rotary regenerators , 2004 .

[19]  Mohammad Heidarinejad,et al.  Outdoor design conditions data for the cities of Iran , 2008 .

[20]  M. Goldsworthy,et al.  Optimisation of a desiccant cooling system design with indirect evaporative cooler , 2011 .

[21]  K. F. Fong,et al.  Advancement of solar desiccant cooling system for building use in subtropical Hong Kong , 2010 .

[22]  Jianlei Niu,et al.  A pre-cooling Munters environmental control desiccant cooling cycle in combination with chilled-ceiling panels , 2003 .

[23]  Hadi Pasdarshahri,et al.  The effects of operational conditions of the desiccant wheel on the performance of desiccant cooling cycles , 2010 .

[24]  G Heydarinezhad,et al.  THE EFFECT OF GEOMETRICAL CHARACTERISTICS OF DESICCANT WHEEL ON ITS PERFORMANCE , 2009 .

[25]  James R. Sand,et al.  Active desiccant integration with packaged rooftop HVAC equipment , 2005 .

[26]  Zhiming Gao,et al.  Theoretical analysis of dehumidification process in a desiccant wheel , 2005 .

[27]  Ahmad Pesaran,et al.  Moisture transport in silica gel packed beds—II. Experimental study , 1987 .

[28]  Mohammad Heidarinejad,et al.  Feasibility of using various kinds of cooling systems in a multi-climates country , 2008 .

[29]  H. Henning,et al.  The potential of solar energy use in desiccant cooling cycles , 2001 .