scholarly journals Reduction of the return temperature in district heating systems with an ammonia-water absorption heat pump

2018 ◽  
Vol 12 ◽  
pp. 817-822
Author(s):  
N. Mirl ◽  
F. Schmid ◽  
K. Spindler
Keyword(s):  
Water Absorption ◽  
Heat Pump ◽  
District Heating ◽  
Ammonia Water ◽  
Absorption Heat Pump ◽  
Heating Systems ◽  
District Heating Systems

Development and demonstration of a compact ammonia–water absorption heat pump prototype with microscale features for space-conditioning applications

2016 ◽  
Vol 102 ◽  
pp. 557-564 ◽  
Author(s):  
Srinivas Garimella ◽  
Christopher M. Keinath ◽  
Jared C. Delahanty ◽  
Dhruv C. Hoysall ◽  
Marcel A. Staedter ◽  
...  
Keyword(s):  
Water Absorption ◽  
Heat Pump ◽  
Ammonia Water ◽  
Absorption Heat Pump

Design and analysis of an ammonia-water absorption heat pump

2020 ◽  
Vol 165 ◽  
pp. 114531 ◽  
Author(s):  
Nico Mirl ◽  
Fabian Schmid ◽  
Bernd Bierling ◽  
Klaus Spindler
Keyword(s):  
Water Absorption ◽  
Heat Pump ◽  
Ammonia Water ◽  
Absorption Heat Pump

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.

Performance characteristics of an ammonia-water absorption heat pump system

2013 ◽  
Vol 37 (14) ◽  
pp. 1917-1927 ◽  
Author(s):  
Mohamed A. Gadalla ◽  
Talaat A. Ibrahim ◽  
Mohamed A. M. Hassan
Keyword(s):  
Water Absorption ◽  
Heat Pump ◽  
Performance Characteristics ◽  
Pump System ◽  
Ammonia Water ◽  
Absorption Heat Pump ◽  
Heat Pump System
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