Thermodynamic simulation of an absorption heat pump-transformer-power cycle operating with the ammonia-water mixture

2021 ◽  
Vol 182 ◽  
pp. 116174
Author(s):  
J.A. Hernández-Magallanes ◽  
Salvador Tututi-Avila ◽  
Andrea Cerdán-Pasarán ◽  
L.I. Morales ◽  
W. Rivera
Keyword(s):  
Heat Pump ◽  
Thermodynamic Simulation ◽  
Water Mixture ◽  
Ammonia Water ◽  
Absorption Heat Pump ◽  
Power Cycle ◽  
Transformer Power

scholarly journals Thermodynamic and Exergoeconomic Analysis of a Supercritical CO2 Cycle Integrated with a LiBr-H2O Absorption Heat Pump for Combined Heat and Power Generation

2020 ◽  
Vol 10 (1) ◽  
pp. 323 ◽  
Author(s):  
Yi Yang ◽  
Zihua Wang ◽  
Qingya Ma ◽  
Yongquan Lai ◽  
Jiangfeng Wang ◽  
...  
Keyword(s):  
Heat Pump ◽  
Supercritical Co2 ◽  
Waste Heat ◽  
Unit Cost ◽  
Heating System ◽  
Combined Heat And Power ◽  
Economic Benefits ◽  
Ammonia Water ◽  
Absorption Heat Pump ◽  
Comparison Results

In this paper, a novel combined heat and power (CHP) system is proposed in which the waste heat from a supercritical CO2 recompression Brayton cycle (sCO2) is recovered by a LiBr-H2O absorption heat pump (AHP). Thermodynamic and exergoeconomic models are established on the basis of the mass, energy, and cost balance equations. The proposed sCO2/LiBr-H2O AHP system is examined and compared with a stand-alone sCO2 system, a sCO2/DH system (sCO2/direct heating system), and a sCO2/ammonia-water AHP system from the viewpoints of energy, exergy, and exergoeconomics. Parametric studies are performed to reveal the influences of decision variables on the performances of these systems, and the particle swarm optimization (PSO) algorithm is utilized to optimize the system performances. Results show that the sCO2/LiBr-H2O AHP system can obtain an improvement of 13.39% in exergy efficiency and a reduction of 8.66% in total product unit cost compared with the stand-alone sCO2 system. In addition, the sCO2/LiBr-H2O AHP system performs better than sCO2/DH system and sCO2/ammonia-water AHP system do, indicating that the LiBr-H2O AHP is a preferable bottoming cycle for heat production. The detailed parametric analysis, optimization, and comparison results may provide some references in the design and operation of sCO2/AHP system to save energy consumption and provide considerable economic benefits.

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.

A study of the characteristics of heat transfer for an ammonia-water bubble mode absorber in absorption heat pump systems

2002 ◽  
Vol 19 (4) ◽  
pp. 552-556
Author(s):  
Jae-Cheol Lee ◽  
Ki-Bong Lee ◽  
Byung-Hee Chun ◽  
Chan Ho Lee ◽  
Jong Joo Ha ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Pump ◽  
Ammonia Water ◽  
Absorption Heat Pump
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