Evaluation of Cycle Characteristics Double-stage Adsorption Heat Pump with Different Adsorbent

Abstract

It is discussed system characteristics of double-stage adsorption heat pump with different adsorbent in this paper. We choose FAM-Z05 as 1st adsorbent, AC as 2nd adsorbent. This system can be operated by heat source of temperature 45-50 ⁰C and generated cooling power at 15 ⁰C. We experimentally study the effect of double-stage system on volumetric cooling power (VCP) and Coefficient of performance (COP) in some heat source of temperature conditions. Results show that double-stage system would produce higher VCP than single-stage system at heat source of temperature 50 ⁰C. The value of COP on double-stage at 50 ⁰C is lower than single-stage since twice amount of heat is utilized for desorption heat to FAM-Z05 and AC. Although the double-stage system with FAM-Z05 and AC are equal to VCP between 45 ⁰C and 50 ⁰C, the value of COP at 45 ⁰C is higher than 50 ⁰C. The value of COP in this double-stage system is affected by amount of sensible heat in FAM-Z05 and AC adsorber.