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Sometimes in a refrigerator several loads are varied. Refrigerators used to function at different loads operated under different condition of temperatures and pressures. There may be arrangements possible for multi evaporators on the basis of single or multi compressors. If refrigerant from each evaporator compressed in the same single compressor then it is called as Multi-evaporator single-compressor system.
Single compressor-individual expansion valve
A two evaporator single compressor with individual expansion valves for each evaporator after passing through the back pressure valve enters into the compressors and hence there is a significant rise in temperature is observed. This system helps in dropping the pressure from high pressure evaporators with the help of back pressure valves. The high pressure ratio is obtained which necessarily compresses the vapor to high extent from the higher temperature evaporators to condenser temperature. This kind of refrigerator has greater application in load varying purpose. Moreover, high value of COP and better operating economy is observed.[1][2]
Mass flow rate through evaporators :-
m1=Heat through evaporator 1(Q1)÷(specific enthalpy difference in evaporator 1)
m2=Heat through evaporator 1(Q2)÷(specific enthalpy difference in evaporator 2))
The net work done is :-
W = (Sum of masses through evaporator 1 and evaporator 2)*(specific enthalpy difference in compressor)
^ 1. ^C P Arora, "Refrigeration and Air Conditioning (Third Edition)", Page:222-223 2. ^Ramesh Chandra Arora, "Refrigeration and Air Conditioning". 3. ^William C. Whitman and William M. johnson, "Refrigeration And Air conditioning"
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January 06, 2023
multi, evaporator, system, this, article, multiple, issues, please, help, improve, discuss, these, issues, talk, page, learn, when, remove, these, template, messages, this, article, unclear, citation, style, reason, given, first, sources, undecipherable, unabl. This article has multiple issues Please help improve it or discuss these issues on the talk page Learn how and when to remove these template messages This article has an unclear citation style The reason given is First two sources are undecipherable and unable to determine what the source is The references used may be made clearer with a different or consistent style of citation and footnoting December 2016 Learn how and when to remove this template message Some of this article s listed sources may not be reliable Please help this article by looking for better more reliable sources Unreliable citations may be challenged or deleted December 2016 Learn how and when to remove this template message This article is an orphan as no other articles link to it Please introduce links to this page from related articles try the Find link tool for suggestions November 2016 Learn how and when to remove this template message A multi evaporator system is a vapor compression refrigeration system generally consisting of four major components Evaporator Compressor Condenser Thermal expansion valveSometimes in a refrigerator several loads are varied Refrigerators used to function at different loads operated under different condition of temperatures and pressures There may be arrangements possible for multi evaporators on the basis of single or multi compressors If refrigerant from each evaporator compressed in the same single compressor then it is called as Multi evaporator single compressor system Single compressor individual expansion valve EditA two evaporator single compressor with individual expansion valves for each evaporator after passing through the back pressure valve enters into the compressors and hence there is a significant rise in temperature is observed This system helps in dropping the pressure from high pressure evaporators with the help of back pressure valves The high pressure ratio is obtained which necessarily compresses the vapor to high extent from the higher temperature evaporators to condenser temperature This kind of refrigerator has greater application in load varying purpose Moreover high value of COP and better operating economy is observed 1 2 Mass flow rate through evaporators m1 Heat through evaporator 1 Q1 specific enthalpy difference in evaporator 1 m2 Heat through evaporator 1 Q2 specific enthalpy difference in evaporator 2 The net work done is W Sum of masses through evaporator 1 and evaporator 2 specific enthalpy difference in compressor W m1 m2 h2 h1 3 References Edit A D 2010 Refrigertion and air conditi df fs sf sfs sds 1 C P Arora Refrigeration and Air Conditioning Third Edition Page 222 223 2 Ramesh Chandra Arora Refrigeration and Air Conditioning 3 William C Whitman and William M johnson Refrigeration And Air conditioning External links EditMulti Evaporator System manufacturer Retrieved from https en wikipedia org w index php title Multi Evaporator System amp oldid 1110514215, wikipedia, wiki, book, books, library,
