International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 05 | May 2023
p-ISSN: 2395-0072
www.irjet.net
Review of Modified Vapor Absorption Refrigeration Cycles Ayush Supe, Sameer Atole, Harsh Mulik , Param Varade. -------------------------------------------------------------------------***------------------------------------------------------------------Abstract: This paper presents a thorough investigation of various vapor absorption refrigeration cycles, including both simple and complex designs, with the goal of achieving a comprehensive understanding of their performance characteristics. The study evaluates the current state of the art in vapor absorption refrigeration and highlights any recent advancements in this field. A theoretical analysis of different vapor absorption cycles with modifications such as an ejector, generator absorber heat exchanger, and booster compressor has been conducted. These modifications aim to reduce throttling losses and require different mechanical hardware of varying levels of complexity and cost. The optimization of operating temperatures in the cycles is crucial for achieving maximum coefficient of performance (COP) and minimum gas requirements in the evaporator, absorber, and main condenser. Hybrid vapor compression absorption refrigeration systems have significantly higher COP compared to conventional vapor compression refrigeration, triple effect, and GAX systems. The triple effect cycle demonstrates a maximum COP of 1.955, which is 132% higher than the single effect cycle, with a gas requirement reduction of approximately 122% under the same conditions. Compared to the GAX cycle, the HGAX cycle shows better performance in terms of the first and second laws of thermodynamics, although it incurs a higher unit product cost. The ejector cycle has a COP that is 30% higher than the conventional single-effect absorption refrigeration cycle and a cooling capacity for waste heat with large temperature glide that is about 20% higher. In general, alternative cycles offer many benefits to vapor absorption refrigeration systems, such as reduced losses, increased performance, and decreased energy consumption.
Keywords Hybrid, Compression, Temperature glide, Heat exchanger, Ejector, Configuration Nomenclature
© 2023, IRJET
|
COP
coefficient of performance
GAX
generator- absorber- heat exchanger
Tv
throttle valve
SHX
suction heat exchanger
AB
absorber
pr
Pressure ratio
P
pressure
Tg,i
Temperature at generator inlet
G
generator
T
temperature (K)
PH
preheater
C
condensor
A
absorber
EV
expansion valve
LPLT A
low pressure low temperature absorber
LPHT A
low pressure high temperature absorber
HPA
high pressure absorber
Impact Factor value: 8.226
|
ISO 9001:2008 Certified Journal
|
Page 1317