Semi-GAX cycles for waste heat powered refrigeration absorption heat pumps

摘要

Waste heat powered absorption refrigeration is an economical and environmentally beneficial means of providing refrigeration. When the temperature is too low to power a conventional single effect absorption cycle, the double-lift cycle is needed. This paper describes several recently conceptualized double-lift cycles that incorporate internal heat exchange between the intermediate pressure absorber and the high pressure generator (termed semi-GAX). Computer modeling identified their key performance parameters. Compared to conventional double-lift cycles, the semi-GAX cycles enjoy a 20% increase in coefficient of performance, and require less total heat duty, implying lower first cost.