Engineering, 25.11.2021 14:00, whitethunder05
A refrigeration cycle driven by an electric motor must maintain a computer laboratory at 188C when the outside temperature is 308C The thermal load consists of heat transfers entering through the walls and roof of the laboratory at a rate of 75,000 kJ/h and from the computers, lighting, and occupants at a rate of 15,000 kJ/h.
Required:
a. Determine the minimum theoretical power required by the electric motor, in kW, and the corresponding coefficient of performance.
b. If the actual power required by the motor for this duty is 8.3 kW, determine the coefficient of performance.
c. If the given temperature and thermal load data are observed for a total of 100 hours and electricity costs 13 cents per kWh, determine the cost, in $, over that period for each of cases (a) and (b).
Answers: 1
Engineering, 03.07.2019 14:10, volleyballfun24
If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.
Answers: 3
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
A refrigeration cycle driven by an electric motor must maintain a computer laboratory at 188C when t...
Mathematics, 16.12.2020 03:20
Mathematics, 16.12.2020 03:20
Mathematics, 16.12.2020 03:20
Mathematics, 16.12.2020 03:20
Mathematics, 16.12.2020 03:20