apor-compression heat pump with Refrigerant 134a astheworking fluid is to be used to soroperates adiabaticallywith an isentropic efficiency of 82%. nea0nronriateevanoratorand.condeoERE
apor-compression heat pump with Refrigerant 134a astheworking fluid is to be used to soroperates adiabaticallywith an isentropic efficiency of 82%. nea0nronriateevanoratorand.condeoERE
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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An office building requires a heat transfer rate of 30 kW to maintain theinsidetemperature at 21°Cwhen theoutsidetemperature is
O°C. Avapor-compression heat pump with Refrigerant 134a astheworkingfluid isto beused to provide the necessary heating. The
compressoroperates adiabatically with an isentropic efficiency of 82%.
Determine appropriate evaporator and condenser pressures of a cyclefor this purpose assuming ATcond = ATevap = 10°C, as
shown in the T-sdiagram. The refrigerantexitstheevaporator assaturated vapor and exitsthecondenser as saturated liquid at the
respective pressures.
AT
cond
Outside
air
21°C
0°C
Inside
air
ATent
Condenser
Evaporator
Expansion
valve
Compressor
Step 1
Determinethe mass flow rate of refrigerant, in kg/s.
m =
kg/s
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