A four-bed mass recovery adsorption refrigeration cycle driven by low temperature waste/renewable heat source

2004 ◽  
Vol 29 (9) ◽  
pp. 1461-1475 ◽  
Author(s):  
K.C.A. Alam ◽  
A. Akahira ◽  
Y. Hamamoto ◽  
A. Akisawa ◽  
T. Kashiwagi
Keyword(s):  
Low Temperature ◽  
Heat Source ◽  
Refrigeration Cycle ◽  
Adsorption Refrigeration ◽  
Mass Recovery

A Totally Heat-Driven Refrigeration System Using Low-Temperature Heat Sources for Low-Temperature Applications

2019 ◽  
Vol 27 (02) ◽  
pp. 1950012 ◽  
Author(s):  
Zeynab Seyfouri ◽  
Mehran Ameri ◽  
Mozaffar Ali Mehrabian
Keyword(s):  
Low Temperature ◽  
Heat Source ◽  
Rankine Cycle ◽  
Exergy Efficiency ◽  
Working Fluid ◽  
Refrigeration Cycle ◽  
Water Mixture ◽  
Refrigeration System ◽  
Power Requirement ◽  
Temperature Heat

In the present study, a totally heat-driven refrigeration system is proposed and thermodynamically analyzed. This system uses a low-temperature heat source such as geothermal energy or solar energy to produce cooling at freezing temperatures. The proposed system comprises a Rankine cycle (RC) and a hybrid GAX (HGAX) refrigeration cycle, in which the RC provides the power requirement of the HGAX cycle. An ammonia–water mixture is used in both RC and HGAX cycles as the working fluid. A comparative study is conducted in which the proposed system is compared with two other systems using GAX cycle and/or a single stage cycle, as the refrigeration cycle. The study shows that the proposed system is preferred to produce cooling at temperatures from 2∘C to [Formula: see text]C. A detailed parametric analysis of the proposed system is carried out. The results of the analysis show that the system can produce cooling at [Formula: see text]C using a low-temperature heat source at 133.5∘C with the exergy efficiency of about 20% without any input power. By increasing the heat source temperature to 160∘C, an exergy efficiency of 25% can be achieved.

Study of the Effects of Mass and Heat Recovery on the Performances of Activated Carbon/Ammonia Adsorption Refrigeration Cycles

2002 ◽  
Vol 124 (3) ◽  
pp. 283-290 ◽  
Author(s):  
T. F. Qu ◽  
W. Wang ◽  
R. Z. Wang
Keyword(s):  
Activated Carbon ◽  
Working Conditions ◽  
Heat Recovery ◽  
Recovery Process ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Refrigeration Cycle ◽  
Adsorption Refrigeration ◽  
Ammonia Adsorption ◽  
Mass Recovery

Mass recovery can play an important role to better the performance of adsorption refrigeration cycles. Cooling capacity can be significantly increased with mass recovery process. The coefficient of performance (COP) of the activated carbon/ammonia adsorption refrigeration cycle might be increased or decreased with mass recovery process due to different working conditions. The advantage is that its COP is not sensitive to the variation of heat capacity of adsorber metal and condensing and evaporating temperature. The cycle with mass and heat recovery has a relatively high COP.

Experimental investigation of mass recovery adsorption refrigeration cycle

2005 ◽  
Vol 28 (4) ◽  
pp. 565-572 ◽  
Author(s):  
Akira Akahira ◽  
K.C. Amanul Alam ◽  
Yoshinori Hamamoto ◽  
Atsushi Akisawa ◽  
Takao Kashiwagi
Keyword(s):  
Experimental Investigation ◽  
Refrigeration Cycle ◽  
Adsorption Refrigeration ◽  
Mass Recovery

scholarly journals Performance Testing and Analysis of Silica Gel-Water Adsorption Refrigerator

2022 ◽  
Vol 2160 (1) ◽  
pp. 012032
Author(s):  
Hongxuan Li ◽  
Tonghua Zou ◽  
Qingling Hui ◽  
Ting Li ◽  
Walter Mittelbach
Keyword(s):  
Low Temperature ◽  
Heat Source ◽  
Water Temperature ◽  
Silica Gel ◽  
Water Adsorption ◽  
Cooling Capacity ◽  
Hot Water ◽  
Low Grade ◽  
Adsorption Refrigeration ◽  
Refrigeration Capacity

Abstract In recent years, adsorption refrigeration technology has attracted wide attention from experts and scholars at home and abroad due to its environmental friendliness and energy saving advantages. In order to study the effectiveness of adsorption refrigeration technology to recover low-grade energy, a silica gel-water adsorption refrigeration system was proposed, which can effectively utilize low-grade energy such as industrial waste heat. The structure and composition of the system are introduced. The operation performance of the unit is tested under different working conditions by orthogonal experimental method, and the experimental results are analyzed. The effects of hot water temperature and flow, chilled water temperature and flow on the refrigeration capacity and COP value of the system are obtained. The experimental results show that under the low-temperature heat source of 55-75°C, the cooling capacity of the system can reach 5.3-12 and the COP value can reach 0.36-0.56. Under the same hot water temperature difference, the cooling capacity and COP value of the system increase rapidly under the condition of changing the hot water temperature at low temperature, indicating that increasing the heat source temperature at low temperature has a greater impact on the system performance. Through the analysis of primary and secondary effects, it is concluded that the inlet temperature of hot water is the main factor affecting the refrigeration capacity and COP value of the system.

Mass recovery four-bed adsorption refrigeration cycle with energy cascading

2005 ◽  
Vol 25 (11-12) ◽  
pp. 1764-1778 ◽  
Author(s):  
Akira Akahira ◽  
K.C. Amanul Alam ◽  
Yoshinori Hamamoto ◽  
Atsushi Akisawa ◽  
Takao Kashiwagi
Keyword(s):  
Refrigeration Cycle ◽  
Adsorption Refrigeration ◽  
Mass Recovery

Mass recovery adsorption refrigeration cycle—improving cooling capacity

2004 ◽  
Vol 27 (3) ◽  
pp. 225-234 ◽  
Author(s):  
Akira Akahira ◽  
K.C.A. Alam ◽  
Yoshinori Hamamoto ◽  
Atsushi Akisawa ◽  
Takao Kashiwagi
Keyword(s):  
Cooling Capacity ◽  
Refrigeration Cycle ◽  
Adsorption Refrigeration ◽  
Mass Recovery
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