Experimental Analysis of a Laboratory-Scale Diesel Engine Exhaust Heat-Driven Absorption Refrigeration System as a Model for Naval Surface Ship Applications

2020 ◽  
Vol 36 (02) ◽  
pp. 152-159 ◽  
Author(s):  
Cüneyt Ezgi ◽  
Sinem Bayrak
Keyword(s):  
Diesel Engine ◽  
Experimental Analysis ◽  
Alternative Energy ◽  
Cooling Capacity ◽  
Energy Sources ◽  
Naval Academy ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Exhaust Heat ◽  
Absorption Refrigeration System

Decreasing industrial energy sources and major environmental problems caused by uncontrolled energy consumption have led to studies on alternative energy sources. This study presents a design and experimental analysis of an exhaust gas-driven absorption refrigeration system for the purpose of air conditioning by using the exhaust heat of a diesel engine, which is installed in the Naval Academy Mechanics Laboratory. The diesel engine is loaded with a dynamometer, and water and ammonia are used as an absorbent and refrigerant, respectively. At various diesel engine loads, cooling capacity and coefficient of performance (COP) of the absorption refrigeration system are calculated. Experimental results have indicated the cooling capacity as 1.098 kW at a maximum engine power of 4.9 HP. The highest COP value in the designed system has been calculated to be .3022 for the generator temperature of 160 C. Although the COP of refrigeration is low, the absorption refrigeration system can be provided a great cooling load from the exhaust heat of diesel engines and can be used in naval surface ships. In addition to energy efficiency of naval surface ships, infrared and acoustic signature can be minimized and a ships susceptibility can be dramatically reduced.

scholarly journals Experimental analysis of absorption refrigeration system driven by waste heat of diesel engine exhaust

2019 ◽  
Vol 23 (1) ◽  
pp. 149-157
Author(s):  
Mukul Kumar ◽  
Randip Das
Keyword(s):  
Diesel Engine ◽  
Waste Heat ◽  
Combustion Engine ◽  
Engine Performance ◽  
Exhaust System ◽  
Bench Test ◽  
Exhaust Gas ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Absorption Refrigeration System

This work presents an experimental study of an ammonia-water absorption refrigeration system using the exhaust of an internal combustion engine as energy source. The exhaust gas energy availability, the performance of the absorption refrigeration system and the engine performance are evaluated. A commercial turbocharged Diesel engine has been tested in a bench test dynamometer, with the absorption refrigeration system adapted to the exhaust system. The maximum COP obtained from the refrigeration system is 0.136 and it has been shown that heat energy available with exhaust gas is capable of producing sufficient cooling capacity for air conditioning the vehicle without requiring any energy input from the engine.

Experimental analysis of the behavior of an Absorption Refrigeration System using a Residential Solar Heating System

2017 ◽  
Author(s):  
MARA NILZA ESTANISLAU REIS ◽  
Carlos Alexandre Costa e Costa ◽  
Ana Claudia de Melo Cunha ◽  
Marcelo Marques Ribeiro ◽  
Nayara Stephanie da Silva Kischka
Keyword(s):  
Experimental Analysis ◽  
Heating System ◽  
Solar Heating ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Absorption Refrigeration System

scholarly journals A Thermodynamic Performance Analysis of Triple Effect Vapour Absorption Refrigeration System Using LiBr-H2O

2021 ◽  
Vol 9 (11) ◽  
pp. 1394-1399
Author(s):  
Sonu Patel
Keyword(s):  
Energy Equation ◽  
Waste Heat ◽  
Solution Concentration ◽  
Cooling Capacity ◽  
Absorption Refrigeration ◽  
Steam Turbines ◽  
Refrigeration System ◽  
Energetic Analysis ◽  
Exit Temperature ◽  
Absorption Refrigeration System

Abstract: Being an eco-friendly system and a cheaper way to produce cooling effect absorption refrigeration system (ARS) is becoming more popular as it can produce higher cooling capacity than vapor compression refrigeration systems, and it can be powered by other sources of energy (like waste heat from gas and steam turbines, or can utilizes renewable source of heat by sun, geothermal, biomass) other than electricity. In the recent years, the interest in absorption refrigeration system is growing because these systems have environmentally friendly refrigerant and absorbent pairs. In this study, a detail energetic analysis of triple stage LiBr-H20 absorption system using First law of thermodynamics is done. An Energy Equation Solver code are used to simulate the computer program is developed for the cycle and results are validated with past studies available is also done. Mass, energy and exergy balance equations and the various complementary relations constitute the simulation model of the triple effect refrigeration system. Further, the effect of exit temperature of generator, absorber, condenser and evaporator on COP, solution concentration and other parameters are studied. It was found in the study that COP increases with increasing the generator exit temperature keeping the absorber exit temperature constant but when the absorber exit temperature is increased COP tends to decrease and the concentration of weak solution leaving HP generator (Xw3), MP generator (Xw2) and LP generator (Xw1) also increases with increase in generator exit temperature, while it decreases with increase in condenser exit temperature. Keywords: Absorption Refrigeration System (ARS), LiBr + H2O, COP, solution concentration, Energy Equation Solver code, energetic analysis, triple effect refrigeration system.

Assessment of Aqua-Ammonia Refrigeration for Pre-Cooling Gas Turbine Inlet Air

2002 ◽  
Author(s):  
Jamal N. Al-Bortmany
Keyword(s):  
Ambient Temperature ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Turbine Inlet ◽  
Aqua Ammonia ◽  
Exhaust Heat ◽  
Ammonia Absorption ◽  
Absorption Refrigeration System

Power providers in Oman encounter the greatest demand for electricity during the summer months. More than 70% of Oman electric power originate from gas turbines. Unfortunately, the power output of gas turbines decreases with increasing ambient temperature. The growth in electricity generation to the summer peak load has been achieved at a very high cost of installing new generators. This paper presents an assessment of using the exhaust heat to run an aqua-ammonia refrigeration system to cool the inlet air. The performance of two General Electric aeroderivative gas turbines, the LM2500+ and the LM1600, with and without absorption refrigeration was investigated. Climate data series from Fahud, central Oman, was used for modeling the variations in ambient temperature during the year to account for the effects of climate condition in the gas turbine performance simulation. Most of the gas turbines in Oman operate on a simple cycle with exhaust heat discharged to the atmosphere. Vapor absorption refrigeration system uses heat from gas turbine exhaust as its source of energy to cool the inlet ambient air to 7°C. It was observed that the available exhaust heat from the gas turbine exceeded the heat required to run the aqua-ammonia absorption refrigeration system. For meteorological conditions existing in the particular site considered in Oman, pre-cooling gas turbine inlet air to 7°C augments power, on a yearly basis, of LM2500+ and LM1600 by 20% and 14% respectively. During the peak hours in summer months, when power is mostly needed, the percentage of power augmented climbed to 39% and 33% for the two gas turbines. It has been concluded that chilling the inlet air of the gas turbine with aqua-ammonia absorption refrigeration is technically feasible and economically appealing.

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