scholarly journals Waste Heat Powered Ammonia Absorption Refrigeration Unit for LPG Recovery

2008 ◽  
Author(s):  
◽  
Keyword(s):  
Waste Heat ◽  
Absorption Refrigeration ◽  
Refrigeration Unit ◽  
Ammonia Absorption

Characterization of Ammonia–Water Absorption Chiller and Application

2018 ◽  
Vol 26 (04) ◽  
pp. 1850035 ◽  
Author(s):  
Gopalakrishnan Anand ◽  
Donald C. Erickson ◽  
Ellen Makar
Keyword(s):  
Simple Model ◽  
Low Temperatures ◽  
Waste Heat ◽  
Cooling Water ◽  
Industrial Applications ◽  
Absorption Refrigeration ◽  
Potential Applications ◽  
Ammonia Absorption ◽  
Simple Equations

Ammonia-absorption refrigeration units (AARUS) can supply subfreezing refrigeration for many industrial applications. Such units are usually driven by waste heat or renewable energy at relatively low temperatures. The performance of the chiller is highly dependent on the temperatures of the driving heat, the chilling load, and the cooling water. In this paper, the performance of an advanced industrial-scale ammonia-absorption unit is modeled over a representative operating range. The performance is then characterized by a set of simple equations incorporating the three external temperatures. This simple model helps to evaluate potential applications, predict performance, and perform initial optimization. Case studies are presented highlighting the application of the model.

scholarly journals Power Increase of Gas Turbines by Inlet Air Pre-Cooling With Absorption Refrigeration Utilizing Exhaust Waste Heat

1986 ◽  
Author(s):  
Werner F. Malewski ◽  
Günther M. Holldorff
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Waste Heat ◽  
Freezing Point ◽  
Absorption Refrigeration ◽  
Ambient Conditions ◽  
Exhaust Waste Heat ◽  
Ammonia Absorption ◽  
Absorption Refrigeration System ◽  
Gas Turbine Exhaust

Using heat energy from the tail-end of gas turbine exhaust, an ammonia absorption refrigeration system can precool the inlet air to a temperature slightly above the freezing point of the air humidity. The concept is described and shows how it indicates a significant increase of gas turbine power output, depending on ambient conditions.

scholarly journals Experimental analysis of triple fluid vapour absorption refrigeration system driven by electrical energy and engine waste heat

2019 ◽  
Vol 23 (5 Part B) ◽  
pp. 2995-3001 ◽  
Author(s):  
Andi Balasubramanian ◽  
Venkatesan Jayaraman ◽  
Suresh Sivan ◽  
Mariappan Vairavan
Keyword(s):  
Thermal Energy ◽  
Waste Heat ◽  
Electrical Energy ◽  
Coefficient Of Performance ◽  
Test Time ◽  
Absorption Refrigeration ◽  
Engine Exhaust ◽  
Power Sources ◽  
Refrigeration Unit ◽  
Absorption Refrigeration System

In this study, performance analysis of absorption refrigeration cycle has been carried out under variable power sources namely electrical and thermal energy sources. The triple fluid vapour absorption system was used in this work. The temperatures at each point in the cycle such as generator, absorber, evaporator and condenser have been measured. The coefficient of performance of the system was calculated and then compared. The results showed that when the cycle driven by electricity, the coefficient of performance varied from 0.28-1.6 along the test time and the generator temperature changed from 66?C to 106?C. When thermal energy used to generate power, the coefficient of performance varied between 0.16 and 0.6 under the generator temperature of 98?C and 150?C. It was observed that the waste heat energy from engine exhaust can be used efficiently and can replace the conventional power source to drive the absorption refrigeration unit.

Aqua Absorption Turbine Inlet Cooler

2003 ◽  
Author(s):  
Donald C. Erickson ◽  
Icksoo Kyung ◽  
G. Anand ◽  
E. E. Makar
Keyword(s):  
Los Angeles ◽  
Waste Heat ◽  
Operating Cost ◽  
Air Cooling ◽  
Vapor Compression ◽  
Absorption Refrigeration ◽  
Ambient Conditions ◽  
Distributed Energy ◽  
Vapor Compression Refrigeration ◽  
Ammonia Absorption

The emerging Distributed Energy Resources (DER) program envisions extensive use of small to midsize turbines for on-site power production. Their output decreases substantially at warm ambient conditions when it is most needed. Therefore inlet air cooling had received much scrutiny as a way to avoid this degradation. This study examines three approaches to inlet air cooling: evaporative cooling; mechanical vapor compression refrigeration; and waste heat powered absorption refrigeration. The benefits and limitations of each process were documented. Ammonia absorption refrigeration is shown to deliver the greatest benefit to continuosly operating turbines at very favorable installed and operating cost. The most economical process identified included an ammonia refrigeration cycle integrated directly into the combustion turbine cycle. This cycle was designed and modeled, and analyzed with ambient temperature conditions for six geographic areas (Boston, Atlanta, Los Angeles, Honolulu, Phoenix, and Chicago). Annual benefits for each area are detailed.

A Parametric Examination of the Factors Affecting the Performance of a Diffusion Absorption Refrigeration System

2021 ◽  
pp. 1-38
Author(s):  
Noman Yousuf ◽  
Timothy Anderson ◽  
Roy Nates
Keyword(s):  
Waste Heat ◽  
Operating Conditions ◽  
Design Parameters ◽  
Working Fluid ◽  
Low Grade ◽  
Absorption Refrigeration ◽  
Factors Affecting ◽  
Thermally Driven ◽  
Mass Flowrate ◽  
Diffusion Absorption

Abstract Despite being identified nearly a century ago, the diffusion absorption refrigeration (DAR) cycle has received relatively little attention. One of the strongest attractions of the DAR cycle lies in the fact that it is thermally driven and does not require high value work. This makes it a prime candidate for harnessing low grade heat from solar collectors, or the waste heat from stationary generators, to produce cooling. However, to realize the benefits of the DAR cycle, there is a need to develop an improved understanding of how design parameters influence its performance. In this vein, this work developed a new parametric model that can be used to examine the performance of the DAR cycle for a range of operating conditions. The results showed that the cycle's performance was particularly sensitive to several factors: the rate of heat added and the temperature of the generator, the effectiveness of the gas and solution heat exchangers, the mass flowrate of the refrigerant and the type of the working fluid. It was shown that can deliver good performance at low generator temperatures if the refrigerant mass fraction in the strong solution is made as high as possible. Moreover, it was shown that a H2O-LiBr working pair could be useful for achieving cooling at low generator temperatures.

scholarly journals Energetic analysis of a commercial absorption refrigeration unit using an ammonia-water mixture

2017 ◽  
Vol 39 (4) ◽  
pp. 439 ◽  
Author(s):  
Josegil Jorge de Araújo ◽  
Carlos Antonio Cabral dos Santos ◽  
Carlos Almir de Holanda ◽  
João Batista Furlan Duarte ◽  
Alvaro Antonio Villa Ochoa ◽  
...  
Keyword(s):  
Water Mixture ◽  
Absorption Refrigeration ◽  
Ammonia Water ◽  
Refrigeration Unit ◽  
Energetic Analysis

Thermal Energy Requirements of Air-Conditioning Systems

1971 ◽  
Vol 93 (2) ◽  
pp. 172-176
Author(s):  
M. E. Lackey
Keyword(s):  
Thermal Energy ◽  
Air Conditioning ◽  
Waste Heat ◽  
Energy Requirements ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Fast Breeder Reactors ◽  
Breeder Reactors ◽  
Absorption Refrigeration System ◽  
Air Conditioning Systems

The thermal energy requirements for air conditioning by compressive and absorption methods were determined for light-water, thermal-breeder, and fast-breeder reactors. The energy required to produce a ton-hour of refrigeration varied from 5100 Btu to 13,100 Btu by absorption and from 5600 to 8800 Btu by compression. The amount of waste heat dissipated to the environment at the reactor site as a consequence of producing a ton-hour of air conditioning ranged from an increase of 21,000 Btu for the electric-motor-driven refrigeration system to a decrease of 6000 Btu for the absorption refrigeration system.

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