Question
Download Solution PDFIn a vapour absorption refrigeration system, heating, cooling, and refrigeration take place at the temperatures of 373 k, 293 K and 268 K respectively. The maximum COP of the system is _______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
COP of VARS is given by relation;
\({\bf{COP}} = \frac{{{{\bf{T}}_{\bf{E}}}\;\left( {{{\bf{T}}_{\bf{G}}} - {{\bf{T}}_0}} \right)}}{{{{\bf{T}}_{\bf{G}}}\;\left( {{{\bf{T}}_0} - {{\bf{T}}_{\bf{E}}}} \right)}}\)
Where, TE = Evaporator temperature, TG = Generator temperature, T0 = Condenser and absorber temperature.
and the pump work is neglected.
Calculation:
Given:
TE = 268 K, TG = 373 K, T0 = 293 K.
\({\bf{COP}} = \frac{{{{\bf{T}}_{\bf{E}}}\;\left( {{{\bf{T}}_{\bf{G}}} - {{\bf{T}}_0}} \right)}}{{{{\bf{T}}_{\bf{G}}}\;\left( {{{\bf{T}}_0} - {{\bf{T}}_{\bf{E}}}} \right)}}\)
\({\rm{COP}} = \frac{{268\;\left( {373 - 293} \right)}}{{373\;\left( {293 - 268} \right)}}\)
∴ COP = 2.3
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