TY - JOUR

T1 - MOF-801 as a promising material for adsorption cooling

T2 - Equilibrium and dynamics of water adsorption

AU - Solovyeva, M. V.

AU - Gordeeva, L. G.

AU - Krieger, T. A.

AU - Aristov, Yu I.

PY - 2018/10/15

Y1 - 2018/10/15

N2 - With exhausting fossil fuels and increasing demand for heating and cooling, the effective utilization of renewable and waste energy sources becomes of increasing importance. Adsorption cooling driven by low temperature heat is an energy and environment saving alternative to the common compression systems. The performance of adsorption chillers strongly depends on the compliance of the adsorbent properties with the cycle operating conditions. In this paper, the comprehensive study of equilibrium and dynamics of water adsorption on a new efficient adsorbent of water vapour MOF-801 is performed to evaluate its feasibility for adsorption cooling. It was shown that at the adsorption temperature of 30 °C the MOF-801 provides the cooling effect at the evaporation temperature as low as 5 °C that indicates significant affinity to water vapour. On the other hand, it can be regenerated by low temperature heat at 80–85 °C. The uptake variation under the conditions of a typical adsorption cooling cycle reaches 0.21 g/g. Water adsorption on loose grains of MOF-801 occurs under grain-size insensitive mode when the adsorption rate is proportional to the (S/m)-ratio of the heat transfer surface S to the adsorbent mass m. The Specific Cooling Power equal to 2 kW/kg is measured at S/m = 6 m2/kg and 80% of reaching the equilibrium conversion, which is of high practical interest. Thus, the results obtained demonstrate the high potential of the working pair “MOF-801 – water” for adsorption cooling.

AB - With exhausting fossil fuels and increasing demand for heating and cooling, the effective utilization of renewable and waste energy sources becomes of increasing importance. Adsorption cooling driven by low temperature heat is an energy and environment saving alternative to the common compression systems. The performance of adsorption chillers strongly depends on the compliance of the adsorbent properties with the cycle operating conditions. In this paper, the comprehensive study of equilibrium and dynamics of water adsorption on a new efficient adsorbent of water vapour MOF-801 is performed to evaluate its feasibility for adsorption cooling. It was shown that at the adsorption temperature of 30 °C the MOF-801 provides the cooling effect at the evaporation temperature as low as 5 °C that indicates significant affinity to water vapour. On the other hand, it can be regenerated by low temperature heat at 80–85 °C. The uptake variation under the conditions of a typical adsorption cooling cycle reaches 0.21 g/g. Water adsorption on loose grains of MOF-801 occurs under grain-size insensitive mode when the adsorption rate is proportional to the (S/m)-ratio of the heat transfer surface S to the adsorbent mass m. The Specific Cooling Power equal to 2 kW/kg is measured at S/m = 6 m2/kg and 80% of reaching the equilibrium conversion, which is of high practical interest. Thus, the results obtained demonstrate the high potential of the working pair “MOF-801 – water” for adsorption cooling.

KW - Adsorption cooling

KW - Adsorption equilibrium

KW - Dynamics

KW - MOF-801

KW - Specific cooling power

KW - Water

KW - PUMPS

KW - PERFORMANCE

KW - HEAT TRANSFORMATION

KW - CHILLERS

KW - METAL-ORGANIC FRAMEWORKS

KW - WORKING PAIR

KW - ENERGY-STORAGE

KW - OPTIMIZATION

KW - ADSORBENT

KW - NH2-MIL-125

UR - http://www.scopus.com/inward/record.url?scp=85051631165&partnerID=8YFLogxK

U2 - 10.1016/j.enconman.2018.08.032

DO - 10.1016/j.enconman.2018.08.032

M3 - Article

AN - SCOPUS:85051631165

VL - 174

SP - 356

EP - 363

JO - Energy Conversion and Management

JF - Energy Conversion and Management

SN - 0196-8904

ER -