ROOM (2) 700kPa x=0 CONDENSER (1) 40°C 700kPa EXPANSION VALVE (3) 100kPa EVAPORATOR (4) 100kPa x=1 OUTSIDE Consider a heat pump cycle operating with R134-a fluid at 0.01kg/s mass flow rate. Conditions are given in the figure. a) What are the values of heat supply rate to the room and heat absorption rate from the outside? b) What is COP of this heat pump? c) Assume we immediately put a watermelon of 8kg to the room at 2°C. Assuming a specific heat of 4200J/kg for the watermelon, how long will it take for the watermelon to reach room temperature of 20°C if we assume that heat pump only heats watermelon? O A) 2.7 minutes B) 3.2 minutes C) 4.4 minutes O D) 5.3 minutes E) 6.2 minutes COMP.
ROOM (2) 700kPa x=0 CONDENSER (1) 40°C 700kPa EXPANSION VALVE (3) 100kPa EVAPORATOR (4) 100kPa x=1 OUTSIDE Consider a heat pump cycle operating with R134-a fluid at 0.01kg/s mass flow rate. Conditions are given in the figure. a) What are the values of heat supply rate to the room and heat absorption rate from the outside? b) What is COP of this heat pump? c) Assume we immediately put a watermelon of 8kg to the room at 2°C. Assuming a specific heat of 4200J/kg for the watermelon, how long will it take for the watermelon to reach room temperature of 20°C if we assume that heat pump only heats watermelon? O A) 2.7 minutes B) 3.2 minutes C) 4.4 minutes O D) 5.3 minutes E) 6.2 minutes COMP.
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter6: Forced Convection Over Exterior Surfaces
Section: Chapter Questions
Problem 6.8P
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Question
Transcribed Image Text:ROOM
(2) 700kPa x=0
CONDENSER
(1) 40°C 700kPa
EXPANSION
VALVE
(3) 100kPa
EVAPORATOR
(4) 100kPa x=1
OUTSIDE
Consider a heat pump cycle operating with R134-a fluid at 0.01kg/s mass flow rate. Conditions are given in the figure.
a) What are the values of heat supply rate to the room and heat absorption rate from the outside?
b) What is COP of this heat pump?
c) Assume we immediately put a watermelon of 8kg to the room at 2°C. Assuming a specific heat of 4200J/kg for the watermelon, how long will
it take for the watermelon to reach room temperature of 20°C if we assume that heat pump only heats watermelon?
O A) 2.7 minutes
B) 3.2 minutes
C) 4.4 minutes
O D) 5.3 minutes
E) 6.2 minutes
COMP.
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