ENERGY AND EXERGY ANALYSIS OF A VAPOR ABSORPTION REFRIGERATION SYSTEM IN AN INTERCITY BUS APPLICATION

Year 2019, Volume: 5 Issue: 4, 355 - 371, 24.06.2019

Nazım Kurtulmuş

https://doi.org/10.18186/thermal.583316

Cited By: 4

Abstract

A Vapor Absorption Refrigeration (VAR) system driven
by the exhaust gas waste heat received from the internal combustion engine of
an intercity bus is modeled and analyzed for air-conditioning the intercity bus
cabin under different operating parameters. Initially, the hourly comfort
cooling load of the intercity bus is calculated for a cooling season spanning
five months between May and October in Turkey. After determining the capacity
of heat source sufficiency for air-conditioning the intercity bus, energy and
exergy analyses of the VAR system are conducted, then designed and compared
with the vapor compression refrigeration system in respect to the effect of
fuel consumption. The results show that approximately 4,489 kg/year of fuel can
be saved by using the VAR system driven by an exhaust gas waste heat in an
intercity bus. The maximum coefficient of performance (COP) of the VAR system
is obtained as 0.78 at 5 a.m. in May, and the maximum total exergy destruction
for the VAR system is obtained as 15.25 kW at 4 p.m. in July. Lastly, the
specific time is selected to investigate the effect of operating and
environmental parameters on the VAR system.

Keywords

Energy, Exergy, Intercity Bus Air-Conditioning, Vapor Absorption Refrigeration System, Water-Lithium Bromide

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