TY - JOUR

T1 - A HeCol cycle for upgrading the ambient heat

T2 - The dynamic verification of desorption stage

AU - Girnik, I. S.

AU - Aristov, Yu I.

PY - 2019/1/5

Y1 - 2019/1/5

N2 - This paper addresses the dynamic study related to a novel adsorption cycle “Heat from Cold” (HeCol) recently proposed for upgrading the ambient heat in cold countries. In this cycle, the adsorbent is deemed to be regenerated by a drop of the adsorptive pressure, whereas the heat needed for desorption is supplied from a natural heat reservoir at a quite low temperature close to 0 °C. The aim of this study is to verify whether such unusual regeneration mode is feasible under typical conditions of the HeCol cycle. Methanol was used as an adsorptive and the activated carbon ACM35.4 - as an adsorbent. It has been shown that such way of regeneration is certainly achievable for the working pair involved which makes the new cycle possible in principle. The methanol desorption can be completed within 5–20 min depending on the configuration of the flat adsorbent bed, namely, the size of the carbon grains and the bed thickness. The maximal specific power of this process can reach 2.4 kW kg−1 that is encouraging for designing compact HeCol units.

AB - This paper addresses the dynamic study related to a novel adsorption cycle “Heat from Cold” (HeCol) recently proposed for upgrading the ambient heat in cold countries. In this cycle, the adsorbent is deemed to be regenerated by a drop of the adsorptive pressure, whereas the heat needed for desorption is supplied from a natural heat reservoir at a quite low temperature close to 0 °C. The aim of this study is to verify whether such unusual regeneration mode is feasible under typical conditions of the HeCol cycle. Methanol was used as an adsorptive and the activated carbon ACM35.4 - as an adsorbent. It has been shown that such way of regeneration is certainly achievable for the working pair involved which makes the new cycle possible in principle. The methanol desorption can be completed within 5–20 min depending on the configuration of the flat adsorbent bed, namely, the size of the carbon grains and the bed thickness. The maximal specific power of this process can reach 2.4 kW kg−1 that is encouraging for designing compact HeCol units.

KW - Activated carbon

KW - Adsorption dynamics

KW - Adsorptive heat transformation

KW - HeCol cycle

KW - Methanol

KW - Specific heating power

KW - GASES

KW - BED

KW - OPTIMIZATION

KW - ADSORPTION

UR - http://www.scopus.com/inward/record.url?scp=85054742770&partnerID=8YFLogxK

U2 - 10.1016/j.applthermaleng.2018.10.040

DO - 10.1016/j.applthermaleng.2018.10.040

M3 - Article

AN - SCOPUS:85054742770

VL - 146

SP - 608

EP - 612

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

ER -