DSpace Collection:http://dspace.dtu.ac.in:8080/jspui/handle/123456789/1072026-04-28T04:04:37Z2026-04-28T04:04:37ZUSE OF ECOFRIENDLY IN LOW TEMPERATURE CIRCUIT IN TERMS OF FIRST LAW AND SECOND LAW EFFICIENCY OF THREE STAGES CASCADE REFRIGERATION OF BIOMEDICAL APPLICATIONSMISHRA, R.S.http://dspace.dtu.ac.in:8080/jspui/handle/repository/153622016-11-22T11:53:45Z2015-01-01T00:00:00ZTitle: USE OF ECOFRIENDLY IN LOW TEMPERATURE CIRCUIT IN TERMS OF FIRST LAW AND SECOND LAW EFFICIENCY OF THREE STAGES CASCADE REFRIGERATION OF BIOMEDICAL APPLICATIONS
Authors: MISHRA, R.S.
Abstract: Biomedical preservation requires storing biological specimens like stem cells blood and organs, at a
storage temperature below -95oC, Hence, the main aim of the current research is to conduct a
thermodynamic energy and exergy analysis to determine the thermal performance of three stages
cascade refrigeration systems in the high temperature condenser temperature using R1234ze and
R1234yf in high temperature circuit of condenser temperature of 70oC and zero degree centrigade of
first evaporator temperature in High temperature circuit, and evaporator temperature(-80oC) in
intermediate circuit using R134a and R410a as ecofriendly refrigerants is investigated. For low
temperature evaporator temperature (-135oC) using hydrocarbons (R290, R600 and R600a), R404aand
other refrigerants in low temperature evaporator circuit on system performances (i.e. overall system
coefficient of performance, (first law efficiency), exergetic efficiency (second law efficiency) and system
exergy destruction ratio (EDR) is investigated in three stages /four stages cascade refrigeration systems
are shown in this paper.2015-01-01T00:00:00Z