Experimental Investigation of Silica gel-Water Adsorption Refrigeration Cycle wit Mass Recovery Process

2004 ◽  
Vol 2004.14 (0) ◽  
pp. 360-363
Author(s):  
Akira AKAHIRA ◽  
K. C. Amanul Alam ◽  
Atsushi AKISAWA ◽  
Takao KASHIWAGI
Keyword(s):  
Experimental Investigation ◽  
Silica Gel ◽  
Water Adsorption ◽  
Recovery Process ◽  
Refrigeration Cycle ◽  
Adsorption Refrigeration ◽  
Mass Recovery

Simulation of Single-stage Silica Gel-Water Adsorption Refrigeration Cycle with Vapor Recovery Process

2002 ◽  
Vol 2002.12 (0) ◽  
pp. 533-536
Author(s):  
Akira AKAHIRA ◽  
K. C. Amanul Alam ◽  
Yoshinori HAMAMOTO ◽  
Atsushi AKISAWA ◽  
Takao KASHIWAGI
Keyword(s):  
Silica Gel ◽  
Water Adsorption ◽  
Recovery Process ◽  
Single Stage ◽  
Refrigeration Cycle ◽  
Adsorption Refrigeration

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

Progress in silica gel–water adsorption refrigeration technology

2014 ◽  
Vol 30 ◽  
pp. 85-104 ◽  
Author(s):  
Dechang Wang ◽  
Jipeng Zhang ◽  
Xiaoliang Tian ◽  
Dawei Liu ◽  
K. Sumathy
Keyword(s):  
Silica Gel ◽  
Water Adsorption ◽  
Adsorption Refrigeration

Two-Stage Non-Regenerative Silica Gel-Water Adsorption Refrigeration Cycle

2000 ◽  
Author(s):  
B. B. Saha ◽  
K. C. A. Alam ◽  
A. Akisawa ◽  
T. Kashiwagi ◽  
K. C. Ng ◽  
...  
Keyword(s):  
Heat Pump ◽  
Silica Gel ◽  
Water Adsorption ◽  
Waste Heat ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Adsorption Refrigeration ◽  
Two Stage ◽  
Adsorption Chiller ◽  
Adsorption Heat Pump

Abstract Over the past two decades there have been considerable efforts to use adsorption (solid/vapor) for cooling and heat pump applications, but intensified efforts were initiated only since the imposition of international restrictions on the production and use of CFCs (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons). Closed-type, conventional adsorption refrigeration and heat pump systems have an increasing market share in Japan. In this paper, a two-stage non-regenerative, silica gel-water adsorption chiller design is outlined. Experimental measurements are performed on a prototype of a 3.5 kW rated cooling capacity adsorption heat pump in order to determine its performance under different operating temperatures (hot, cooling and chilled water). The chiller performance is analyzed in terms of cooling capacity and coefficient of performance (COP). The main innovative feature in the two-stage adsorption chiller is the ability to utilize low-temperature waste heat (∼55°C) as the driving source with a cooling source of 30°C. The technological difficulty inherent in operating a thermally activated cycle with such a small regenerating temperature lift (temperature difference between heat source and heat sink inlets) is overcome by use of a two-stage cycle.

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