Abstract: Thermodynamic analysis of a new adsorption cycle recently suggested for upgrading ambient heat (the so-called “Heat from Cold” or HeCol cycle) was performed. The energy and entropy balances at each cycle stage and in each converter component were calculated for the methanol–AC-35.4 activated carbon working pair under conditions of ideal heat transfer. It is shown that useful heat can be obtained only if the ambient temperature is below a threshold temperature. The threshold temperature was calculated based on the Polanyi principle of temperature invariance and was experimentally validated. The specific useful heat can reach 200–300 J/(g adsorbent), which is of practical interest. The use of adsorbents with an abrupt change in the adsorption uptake between boundary isosters of the cycle may lead to further enhancement of the useful heat. For the HeCol cycle, the exergy losses under the conditions of ideal heat transfer are small. At low ambient temperature, the losses in the evaporator, condenser, and adsorber are comparable, whereas at higher ambient temperature the main exergy losses originate from the adsorber heating and cooling.

Cite: Okunev B.N. , Voskresensky N.M. , Girnik I.S. , Aristov Y.I.
Thermodynamic Analysis of the New Adsorption Cycle “HeCol” for Ambient Heat Upgrading: Ideal Heat Transfer
Journal of Engineering Thermophysics (Russian Journal of Engineering Thermophysics до 2001 года). 2018. V.27. N3. P.327-338. DOI: 10.1134/s1810232818030086 WOS Scopus РИНЦ AN OpenAlex

Dates:

Submitted:	Jan 16, 2018
Published print:	Jul 1, 2018
Published online:	Aug 4, 2018

Identifiers:

Web of science:	WOS:000440826400007
Scopus:	2-s2.0-85051116232
Elibrary:	35712871
Chemical Abstracts:	2018:1496321
OpenAlex:	W2887076181

Citing:

DB	Citing
Web of science	6
Scopus	7
Elibrary	11
OpenAlex	11

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