Experimental evaluation of a small-capacity, waste-heat driven ammonia-water absorption chiller

2017 ◽  
Vol 79 ◽  
pp. 89-100 ◽  
Author(s):  
Anurag Goyal ◽  
Marcel A. Staedter ◽  
Dhruv C. Hoysall ◽  
Mikko J. Ponkala ◽  
Srinivas Garimella
Keyword(s):  
Water Absorption ◽  
Experimental Evaluation ◽  
Waste Heat ◽  
Absorption Chiller ◽  
Ammonia Water ◽  
Small Capacity

scholarly journals Waste-heat driven ammonia-water absorption chiller for severe ambient operation

2019 ◽  
Vol 154 ◽  
pp. 442-449 ◽  
Author(s):  
Srinivas Garimella ◽  
Mikko J. Ponkala ◽  
Anurag Goyal ◽  
Marcel A. Staedter
Keyword(s):  
Water Absorption ◽  
Waste Heat ◽  
Absorption Chiller ◽  
Ammonia Water

Dynamic model for a small-capacity ammonia–water absorption chiller

2013 ◽  
Vol 19 (7) ◽  
pp. 865-881 ◽  
Author(s):  
Vinodh K. Viswanathan ◽  
Alexander S. Rattner ◽  
Matthew D. Determan ◽  
Srinivas Garimella
Keyword(s):  
Water Absorption ◽  
Dynamic Model ◽  
Absorption Chiller ◽  
Ammonia Water ◽  
Small Capacity

scholarly journals Experimental and numerical study of a falling film absorber in an ammonia-water absorption chiller

2017 ◽  
Vol 111 ◽  
pp. 374-385 ◽  
Author(s):  
Delphine Triché ◽  
Sylvain Bonnot ◽  
Maxime Perier-Muzet ◽  
François Boudéhenn ◽  
Hélène Demasles ◽  
...  
Keyword(s):  
Water Absorption ◽  
Numerical Study ◽  
Falling Film ◽  
Absorption Chiller ◽  
Ammonia Water

Experimental Investigation of the Effect of Generator Temperature on the Performance of Solution Transportation Absorption Chiller

2017 ◽  
Vol 25 (03) ◽  
pp. 1750028 ◽  
Author(s):  
Koji Enoki ◽  
Fumi Watanabe ◽  
Atsushi Akisawa ◽  
Toshitaka Takei
Keyword(s):  
Experimental Investigation ◽  
Heat Source ◽  
Waste Heat ◽  
Demand Side ◽  
Conventional System ◽  
Absorption Chiller ◽  
Ammonia Water ◽  
Absorption Chillers ◽  
Heat Demand ◽  
Normal Absorption

It is effective to recover waste heat to reduce primary energy consumption. From this point of view, we proposed and examined a new idea of heat transportation using ammonia–water as the working fluid in the system named the Solution Transportation Absorption chiller (STA). As waste heat sources are not necessarily located close to areas of heat demand, conventionally, absorption chillers are located on heat source side and produce chilled water that is transported to heat demand side through pipelines with an insulation. In contrast, the proposed system STA divides an absorption chiller into two parts. The generator and the condenser are located on heat source side while the evaporator and the absorber are on heat demand side. Both the conventional system and STA system satisfy the same boundary condition of heat recovery and heat supply to the demand side, STA can work for transferring thermal energy as the conventional system does even though the temperature of the media is ambient without an insulation. Our previous studies of the STA were based on the experimental investigation with the STA facility where the cooling power was 90[Formula: see text]kW (25.6 refrigeration ton) at the generator temperature 120[Formula: see text]C from 0[Formula: see text]m (normal absorption chiller) to 1000[Formula: see text]m. Thus, the Coefficient of Performance (COP) of STA was found to have almost the same value of 0.65 with conventional absorption chillers without depending on the transportation distances. The objective of this study is to examine the effect of generator temperature from 100[Formula: see text]C to 120[Formula: see text]C on the performance of solution transportation of ammonia–water solution, because the generator temperature is directly linked to the waste heat temperature, so its effect needs to be investigated. The experimental facility tested the performance with 0[Formula: see text]m (normal absorption chiller), 200[Formula: see text]m and 500[Formula: see text]m distance. The results indicate that the effect of the generator temperature and solution transportation distances showed no significant on the COP.

Compact Diesel Engine Waste-Heat Driven Ammonia-Water Absorption Heat Pump Modeling and Performance Maximization Strategies

2021 ◽  
pp. 1-28
Author(s):  
Christopher M. Keinath ◽  
Jared Delahanty ◽  
Srinivas Garimella ◽  
Michael A. Garrabrant
Keyword(s):  
Heat Exchanger ◽  
Water Absorption ◽  
Heat Pump ◽  
Waste Heat ◽  
Cooling Capacity ◽  
Operating Conditions ◽  
Heat Transfer Fluid ◽  
Ammonia Water ◽  
Absorption Heat Pump ◽  
Wide Range

Abstract An investigation of the best ways to achieve optimal performance from a waste-heat-driven ammonia-water absorption heat pump over a wide range of operating conditions is presented. Waste-heat is recovered using an exhaust gas heat exchanger and delivered to the desorber by a heat transfer fluid loop. The absorber and condenser are hydronically coupled in parallel to an ambient heat exchanger for heat rejection. The evaporator provides chilled water for space-conditioning with a baseline cooling capacity of 2 kW. A detailed thermodynamics model is developed to simulate performance and develop strategies to achieve the best performance in both cooling and heating modes over a range of operating conditions. These parametric studies show that improved coefficients of performance can be achieved by adjusting the coupling fluid temperatures in the evaporator and the condenser/absorber as the ambient temperature varies. With the varying return temperatures, the system is able to provide the 2 kW design cooling capacity for a wide range of ambient temperatures.

Model-based feedback control of an ammonia-water absorption chiller

2015 ◽  
Vol 21 (3) ◽  
pp. 357-364 ◽  
Author(s):  
Anurag Goyal ◽  
Alexander S. Rattner ◽  
Srinivas Garimella
Keyword(s):  
Feedback Control ◽  
Water Absorption ◽  
Absorption Chiller ◽  
Ammonia Water ◽  
Model Based

Simulation of an ammonia–water absorption chiller

2013 ◽  
Vol 60 ◽  
pp. 269-283 ◽  
Author(s):  
Brice Le Lostec ◽  
Nicolas Galanis ◽  
Jocelyn Millette
Keyword(s):  
Water Absorption ◽  
Absorption Chiller ◽  
Ammonia Water
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