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ochreyak446Lv1
11 Dec 2019
one kg of Refrigerant 22, initially at p1 = 0.9 MPa, u1 =232.91 kJ/kg, is contained within a rigid closed tank. The tank is fitted with a paddle wheel that transfers energy to the refrigerant at a constant rate of 0.1 kW. Heat transfer from the surroundings to the refrigerant occurs at a rate of Kt, where K is a constant with units of kW/minute, and t is the time in minutes. After 20minutes of stirring, the refrigerant is at p2 = 1.2 MPa, u2 =276.67 kJ/kg. There is no change in the kinetic or potential energy. For the refrigerant, determine the work and heat transfer in kJ. Determine the value of the constant K appearing in the given heat transfer equation, in kW/min.
one kg of Refrigerant 22, initially at p1 = 0.9 MPa, u1 =232.91 kJ/kg, is contained within a rigid closed tank. The tank is fitted with a paddle wheel that transfers energy to the refrigerant at a constant rate of 0.1 kW. Heat transfer from the surroundings to the refrigerant occurs at a rate of Kt, where K is a constant with units of kW/minute, and t is the time in minutes. After 20minutes of stirring, the refrigerant is at p2 = 1.2 MPa, u2 =276.67 kJ/kg. There is no change in the kinetic or potential energy. For the refrigerant, determine the work and heat transfer in kJ. Determine the value of the constant K appearing in the given heat transfer equation, in kW/min.
Tauseef ShaikhLv10
18 Mar 2021
