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Performance of a finned activated carbon cloth-ethanol adsorption chiller.

Author(s) : TIERNEY M., KETTERINGHAM L., MOHD NOR A.

Type of article: Article

Summary

Measurements of cooling power and heat demand are presented for an adsorption heat pump (AHP) that integrated a finned adsorbent heat exchanger and a solar collector. For this study the adsorbent heat exchanger was heated/cooled with fluid at near constant temperature. Results from a bench scale, large temperature jump (LTJ) test were scaled to predict the outcome of a larger experiment (adjusting for heat losses and additional heat capacities). The AHP’s measured coefficients of performance were COP ? [0.119, 0.236] versus COP ? [0.233, 0.337] expected. The factor of discrepancy in specific cooling power (predicted cooling power divided by measured cooling power) is 1.1–2.0 versus a range of 2–6 suggested elsewhere. Although the scale-up procedure accounted for additional heat capacities, unwanted air ingress (even for mole fractions < 0.1%) might have substantially reduced adsorption/evaporation rates.

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