This document presents information on a combined ejector-vapor compression cycle for refrigeration and air conditioning. It begins with an introduction noting the conventional use of electricity in R&AC and the low COP of solar energy systems. It then discusses the conventional vapor compression cycle and Rankine cycle before explaining the ejector cooling system and combined ejector-vapor compression cycle. The combined cycle is said to eliminate disadvantages in an eco-friendly way with over 50% increase in COP compared to conventional cycles while preventing ozone depletion and reducing greenhouse effects in a cost effective and low maintenance system.

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GREEN REFRIGERATION &
AIR CONDITIONING
Presented By
Asheem Kumar Palo
&
Pranav Kumar
Centurion University, INDIA

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Table of Contents
• Introduction
• Conventional Refrigeration (Vapor Compression Cycle)
• Rankine Vapor Compression Cooling Cycle
• Ejector Cooling System
• Combined Ejector-Vapor Compression Cycle
• Conclusions
• Thank Yo

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INTRODUCTION
• Refrigerators and Air-conditioners satisfy the needs of present luxury and comfortness
• The conventional R & AC system uses electricity.
• The nonconventional way of power generation is solar energy. But a solar energy system
has low COP.
• The Combined Ejector-Vapor Compression Cycle eliminates these disadvantages in an eco-
friendly way.

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CONVENTIONAL REFRIGERATION (VAPOR
COMPRESSION CYCLE)

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Rankine Vapor Compression Cooling Cycle

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EJECTOR COOLING SYSTEM

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Combined Ejector-Vapor Compression Cycle

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Refrigerant
Type
Refrigerant ODP GWP
CFC
R12 1 8500
R113 0.8 5000
HFC
R123 0.02 93
R134a ~0 3200
R23 0
12100
𝐶𝑂𝑃 =
𝑄 𝐸𝑉𝐴𝑃𝑂𝑅𝐴𝑇𝑂𝑅
𝑄 𝐶𝑂𝑀𝑃𝑅𝐸𝑆𝑆𝑂𝑅 + 𝑊 𝑃𝑈𝑀𝑃

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Conclusions
In the Combined Ejector-Vapor Compression Cycle is:
 There is a potential increase in the COP system by more than 50% over conventional cycles
 The green refrigeration and air-conditioning prevents future ozone layer depletion.
 Green house effect is reduced
 It is a cost effective system and requires a low maintenance

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THANK YOU