Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 17 Sep 2017 My Price 7.00

cost of electricity

Solve the following engineering problems using the python codes:
Question 1) A heat pump using R134a is proposed for heating a home that requires a maximum
heating load of 300 kW. The evaporator operates at -12°C and the condenser at
800 kPa. Assume an ideal cycle.
(a) Determine the COP.
(b) Determine the cost of electricity at $0.07/kWh at peak load.
(c) Compare the R134a system with the cost of operating a furnace at peak
load using natural gas at $0.50/therm if there are 100 000 kJ/therm of
natural gas.
Question 2.) R134a is used in an ideal vapor refrigeration cycle operating between saturation
temperatures of -24°C in the evaporator and 39.39°C in the condenser with mass flow rate of 0.6kg/sThe ideal refrigeration cycle is used in the operation of an actual refrigerator. It experiences the following real effects:
• The refrigerant leaving the evaporator is superheated to -20°C.
• The refrigerant leaving the condenser is subcooled to 40°C.
• The compressor is 80 percent efficient.
Calculate the actual rate of refrigeration and the coefficient of performance.

Answers

Maurice Tutor
(5)
Status NEW Posted 17 Sep 2017 09:09 AM My Price 7.00

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