Engineering, 26.07.2019 20:20 mooneyhope24
What is the maximal coefficient of performance of a refrigerator which cools down 10 kg of water (and then ice) to -6c. upper heat source of this refrigerator is surroundings at constant temperature 21c. initially water is in equilibrium with surroundings. what is maximal coefficient of performance of heat pump operating in the same configuration. specific heat of water, specific heat of ice, and latent heat of fusion are equal to 4.19kj/kg/k, 2.1kj/kg/k and 335 kj/kg, respectively.
Answers: 3
Engineering, 03.07.2019 15:10
Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?
Answers: 3
Engineering, 04.07.2019 18:10
The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false
Answers: 1
Engineering, 04.07.2019 18:10
Fluids at rest possess no flow energy. a)- true b)- false
Answers: 3
Engineering, 04.07.2019 18:10
Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.
Answers: 2
What is the maximal coefficient of performance of a refrigerator which cools down 10 kg of water (an...
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