Performance of a dual-purpose solar continuous adsorption system

A conceptual design and performance of a dual-purpose solar continuous adsorption system for domestic refrigeration and water heating is described. Malaysian activated carbon and methanol are used as the adsorbent–adsorbate pair. The heat rejected by the adsorber beds and condensers during the cooling process of the refrigeration part is recovered and used to heat water for the purpose of domestic consumption. In a continuous 24-h cycle, 16.9MJ/day of heat can be recovered for heating of water in the storage tanks. In the single-purpose intermittent solar adsorption system, this heat is wasted. The total energy input to the dual-purpose system during a 24-h operation is 61.2MJ/day and the total energy output is 50MJ/day. The latter is made up of 44.7MJ/day for water heating and 5.3MJ/day for ice making. The amount of ice that can be produced is 12kg/day. Using typical value for the efficiency of evacuated tube collector of water heating system of 65%, the following coefficient of performances (COP's) are obtained: 44% for adsorption refrigeration cycle, 73% for dual-purpose solar water heater, 9.1% for dual-purpose solar adsorption refrigeration and 82.1% for dual-purpose of both solar water heater and refrigerator.

[1]  Francis Meunier,et al.  Experimental study of cascading adsorption cycles , 1989 .

[2]  Robert E. Critoph,et al.  Forced convection adsorption cycles , 1998 .

[3]  Ruzhu Wang,et al.  Experiments of a solar flat plate hybrid system with heating and cooling , 2002 .

[4]  R. E. Critoph.  Forced convection adsorption cycle with packed bed heat regeneration , 1999 .

[5]  Ruzhu Wang,et al.  Research on a combined adsorption heating and cooling system , 2002 .

[6]  Ruzhu Wang,et al.  Study on a New Solid Absorption Refrigeration Pair: Active Carbon Fiber—Methanol , 1997 .

[7]  Takao Kashiwagi,et al.  Solar/waste heat driven two-stage adsorption chiller: the prototype , 2001 .

[8]  R. E. Critoph.  An ammonia carbon solar refrigerator for vaccine cooling , 1994 .

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

[10]  Ion Ion,et al.  DESIGN AND PERFORMANCE SIMULATION OF NEW SOLAR CONTINUOUS SOLID ADSORPTION REFRIGERATION AND HEATING HYBRID SYSTEM , 2009 .

[11]  Marie-Noëlle Pons,et al.  Experimental study of adsorptive solar-powered ice makers in Agadir (Morocco)—1. Performance in actual site , 1992 .

[12]  Ruzhu Wang,et al.  Design and performance simulation of a new solar continuous solid adsorption refrigeration and heating hybrid system , 2002 .

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

[14]  R. E. Critoph,et al.  Thermophysical properties of monolithic carbon , 2000 .

[15]  Ruzhu Wang,et al.  An energy efficient hybrid system of solar powered water heater and adsorption ice maker , 2000 .

[16]  Ruzhu Wang,et al.  A new combined adsorption–ejector refrigeration and heating hybrid system powered by solar energy , 2002 .

[17]  F. Meunier.  Sorption solar cooling , 1994 .

[18]  M. Y. Sulaiman,et al.  Review of materials for solar thermal collectors , 2005 .