Engineering, 24.04.2020 17:31, Alexistorres286
5.46 By supplying energy at an average rate of 24,000 kJ/h, a heat pump maintains the temperature of a dwelling at 20°C. If electricity costs 8.5 cents per kW · h, determine the minimum theoretical operating cost for each day of operation if the heat pump receives energy by heat transfer from (a) the outdoor air at −7°C. (b) the ground at 5°C.
Answers: 1
Engineering, 04.07.2019 18:20, samantha636
Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k
Answers: 2
Engineering, 04.07.2019 19:20, dndndndnxmnc
The process in which the system pressure remain constant is called a)-isobaric b)-isochoric c)-isolated d)-isothermal
Answers: 3
5.46 By supplying energy at an average rate of 24,000 kJ/h, a heat pump maintains the temperature of...
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