Review of regenerative adsorption heat pumps

NASA is again considering a permanent lunar base as part of its new Exploration Vision. Because the lunar surface reaches 100°C near the equator during the lunar day (14.75 Earth days) and -100°C during the lunar night (also 14.75 Earth days), some type of heat pump is needed to elevate the temperature of absorbed sunlight and interior waste heat in order to reject it to space. An earlier investigation by M. A. Lambert (Conceptual Design of a Regenerative Adsorption Heat Pump for a Lunar Base, AIAA Paper 99-0465, 1999) identified adsorption (solid-vapor) heat pumps as one of two technologies best suited to this application, the other being a mechanical vapor compression device with a high-efficiency centrifugal compressor. In order to properly preface the creation of a detailed design for an adsorption heat pump, this investigation reviews the state of the art in adsorption heat pumps, specifically the recently developed, much more efficient, regenerative variants. The principal figures of merit are the coefficient of performance for cooling (COP C ) and the specific cooling power. Nonregenerative adsorption heat pumps exhibit a COP C of only 0.3 to 0.4, whereas regenerative designs have achieved a COP C of 1.1 with 70% regeneration of waste heat. Attention has focused on maximizing overall heat transfer coefficient and minimizing nonadsorbent mass of the most critical component, the adsorption bed, while maintaining adequate vapor permeability. This involves establishing a thermal wave temperature gradient traversing the bed, which minimizes the temperature difference for heat transfer and entropy generation. A number of novel designs have resulted. The most studied adsorbents are zeolites (a class of highly nanoscopically porous minerals), activated graphite, and silica gel. The refrigerants receiving the greatest attention are ammonia, methanol, and water.

[1]  Le Zhang,et al.  Design and testing of an automobile waste heat adsorption cooling system , 2000 .

[2]  Samuel M. Sami,et al.  An improved model for predicting the dynamic behaviour of adsorption systems , 1996 .

[3]  Francis Meunier,et al.  Analytical study of a gas-fired adsorptive air-conditioning system , 1996 .

[4]  T. Maschmeyer,et al.  Regarding pressure in the adsorber of an adsorption heat pump with thin synthesized zeolite layers on heat exchangers , 2001 .

[5]  L. L. Vasiliev,et al.  Solar-gas solid sorption heat pump , 2001 .

[6]  Ruzhu Wang,et al.  Study of the fundamentals of adsorption systems , 1997 .

[7]  Ruzhu Wang,et al.  Performance modeling and testing on a heat-regenerative adsorptive reversible heat pump , 2002 .

[8]  Melkon Tatlier,et al.  A novel approach to enhance heat and mass transfer in adsorption heat pumps using the zeolite–water pair , 1999 .

[9]  Takao Kashiwagi,et al.  Optimization of a solar driven adsorption refrigeration system , 2001 .

[10]  A. Erdem-Senatalar,et al.  Optimization of the cycle durations of adsorption heat pumps employing zeolite coatings synthesized on metal supports , 2000 .

[11]  K. F. Knoche,et al.  Enhancement of the heat and mass transfer in compact zeolite layers , 1996 .

[12]  Ruzhu Wang,et al.  Performance researches and improvements on heat regenerative adsorption refrigerator and heat pump , 2001 .

[13]  Giovanni Restuccia,et al.  Reversible adsorption heat pump: a thermodynamic model , 1995 .

[14]  Takao Kashiwagi,et al.  Thermodynamic analysis of adsorption refrigeration cycles , 1997, IECEC-97 Proceedings of the Thirty-Second Intersociety Energy Conversion Engineering Conference (Cat. No.97CH6203).

[15]  Giovanni Restuccia,et al.  Influence of the adsorber heat exchanger design on the performance of the heat pump system , 1999 .

[16]  D. I. Tchernev,et al.  High-efficiency regenerative zeolite heat pump , 1988 .

[17]  J. J. Guilleminot,et al.  Heat and mass transfer in a non-isothermal fixed bed solid adsorbent reactor: a uniform pressure-non-uniform temperature case , 1987 .

[18]  Francis Meunier,et al.  Experimental results and modeling tests of an adsorptive air-conditioning unit , 1998 .

[19]  Francis Meunier,et al.  Second-law analysis of adsorptive refrigeration cycles: The role of thermal coupling entropy production , 1997 .

[20]  M. Pons,et al.  Accounting for the real properties of the heat transfer fluid in heat-regenerative adsorption cycles for refrigeration , 2000 .

[21]  M. Pons.  Analysis of the adsorption cycles with thermal regeneration based on the entropic mean temperatures , 1997 .

[22]  Ruzhu Wang,et al.  Adsorption refrigeration research in Shanghai Jiao Tong University , 2001 .

[23]  Giovanni Restuccia,et al.  Performances of adsorption systems for ambient heating and air conditioning , 1999 .

[24]  Francis Meunier,et al.  Numerical analysis of adsorptive temperature wave regenerative heat pump , 1996 .

[25]  Emmanuel E. Anyanwu,et al.  Simulation of a solid adsorption solar refrigerator using activated carbon/methanol adsorbent/refrigerant pair , 2001 .

[26]  Thorsten Miltkau,et al.  Dynamic modeling of the combined heat and mass transfer during the adsorption/desorption of water vapor into/from a zeolite layer of an adsorption heat pump , 2002 .

[27]  Ling Wang,et al.  Effects of coupled heat and mass transfers in adsorbent on the performance of a waste heat adsorption cooling unit , 1999 .

[28]  Z. Lavan,et al.  Numerical solution of nonlinear hyperbolic equations governing a regenerative closed-cycle adsorption cooling and heating system , 1992 .

[29]  Ruzhu Wang,et al.  Adsorption cold storage system with zeolite–water working pair used for locomotive air conditioning , 2003 .

[30]  Ruzhu Wang,et al.  Performance improvement of adsorption cooling by heat and mass recovery operation , 2001 .

[31]  Sam V. Shelton,et al.  Gas fired sorption heat pump development , 1993 .

[32]  M. Pons.  Global analysis of refrigerative adsorption cycles with thermal regeneration (non-uniform temperature) , 1997 .

[33]  Ruzhu Wang,et al.  Dynamic analysis of heat recovery process for a continuous heat recovery adsorption heat pump , 2002 .

[34]  Shengwei Wang,et al.  Experimental investigation of contact resistance in adsorber of solar adsorption refrigeration , 2002 .

[35]  William J. Wepfer,et al.  Ramp Wave Analysis of the Solid/Vapor Heat Pump , 1990 .

[36]  Giovanni Restuccia,et al.  Progress on adsorption heat pumps , 1994 .

[38]  T. Morimoto,et al.  Adsorption sites for water on graphite. 5. Effect of hydrogen-treatment of graphite , 1991 .

[39]  Giovanni Cerri,et al.  Internal combustion engine waste heat potential for an automotive absorption system of air conditioning Part 1: Tests on the exhaust system of a spark-ignition engine , 2000 .

[40]  William J. Wepfer,et al.  A two-temperature model of the regenerative solid-vapor heat pump , 1994 .

[41]  Alojz Poredoš,et al.  Influence of adsorption cycle limitations on the system performance , 2001 .

[42]  William M. Worek,et al.  Effect of design and operating parameters on the performance of two-bed sorption heat pump systems , 1995 .

[43]  M. Pons,et al.  Adsorptive machines with advanced cycles for heat pumping or cooling applications , 1999 .

[44]  Francis Meunier,et al.  Experimental Tests and Predictive Model of an Adsorptive Air Conditioning Unit , 1999 .

[45]  R. E. Critoph.  Performance limitations of adsorption cycles for solar cooling , 1988 .

[46]  Dimiter I. Tchernev,et al.  Natural Zeolites in Solar Energy Heating, Cooling, and Energy Storage , 2001 .

[47]  Donald W Breck,et al.  Zeolite Molecular Sieves: Structure, Chemistry, and Use , 1974 .

[48]  F. Meunier,et al.  EXPERIMENTAL TEMPERATURE FRONTS FOR ADSORPTIVE HEAT PUMP APPLICATIONS , 1996 .

[49]  W. Wepfer,et al.  Effects of adsorbent conductivity and permeability on the performance of a solid sorption heat pump , 1999 .

[50]  Ruzhu Wang,et al.  Experiment on a continuous heat regenerative adsorption refrigerator using spiral plate heat exchanger as adsorbers , 1998 .

[51]  A. Erdem-Senatalar,et al.  When do thin zeolite layers and a large void volume in the adsorber limit the performance of adsorption heat pumps , 2002 .

[52]  Giovanni Restuccia,et al.  Zeolite heat pump for domestic heating , 1988 .

[53]  Y. Çengel,et al.  Thermodynamics : An Engineering Approach , 1989 .

[54]  D. A. Mishkinis,et al.  A solar and electrical solid sorption refrigerator , 1999 .

[55]  M. Härkönen,et al.  Analytical model for the thermal wave adsorption heat pump cycle , 1992 .

[56]  Takao Kashiwagi,et al.  Silica gel water advanced adsorption refrigeration cycle , 1997 .

[57]  Improvement of both adsorption performance of silica gel and heat transfer characteristics by means of heat exchange modulation for a heat pump , 1996 .