Chapter 5, Problem 5.29CU

An oil pump operating at steady state delivers oil at a rate of 10 lb/s through a 1-in.-diameter exit pipe. The oil, which can be modeled as incompressible, has a density of 70 lb/ft3 and experiences a pressure rise from inlet to exit of 40 lb/in². There is no significant elevation difference between inlet and exit, and the inlet kinetic energy is negligible. Heat transfer between the pump and its surroundings is negligible, and there is no significant change in temperature as the oil passes through the pump. Determine the velocity of the oil at the exit of the pump, in ft/s, and the power required for the pump, in hp. Determine the power required for the pump, in hp.

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An oil pump operating at steady state delivers oil at a rate of 13 lb/s through a 1-in.-diameter exit pipe. The oil, which can be modeled as incompressible, has a density of 85 lb/ft3 and experiences a pressure rise from inlet to exit of 40 lb/in². There is no significant elevation difference between inlet and exit, and the inlet kinetic energy is negligible. Heat transfer between the pump and its surroundings is negligible, and there is no significant change in temperature as the oil passes through the pump. Determine the velocity of the oil at the exit of the pump, in ft/s, and the power required for the pump, in hp. Step 1 Your answer is correct. Determine the velocity of the oil at the exit of the pump, in ft/s. V₂ = 28.064 Hint Step 2 * Your answer is incorrect. ft/s Determine the power required for the pump, in hp. Win = 1.60155105 eTextbook and Media hp Attempts: 1 of 4 used

* \Q1 The refrigerator shown in Fig. P5.35 operates at steady state with a coefficient of performance of 4.5 and a power in- put of 0.8 kW. Energy is rejected from the refrigerator to the surroundings at 20°C by heat transfer from metal coils whose average surface temperature is 28°C. Determine (a) the rate energy is rejected, in kW. (b) the lowest theoretical temperature inside the refrigerator, in К. (c) the maximum theoretical power, in kW, that could be de- veloped by a power cycle operating between the coils and the surroundings. Would you recommend making use of this opportunity for developing power? Refrigerator B = 4.5 Surroundings, 20°C Coils, 28°C S. 0.8 kW إضافة ملف

An oil pump operating at steady state delivers oil at a rate of 11 lb/s through a 1-in-diameter exit pipe. The oil, which can be modeled as incompressible, has a density of 55 lb/ft3 and experiences a pressure rise from inlet to exit of 40 lb/in². There is no significant elevation difference between inlet and exit, and the inlet kinetic energy is negligible. Heat transfer between the pump and its surroundings is negligible, and there is no significant change in temperature as the oil passes through the pump. Determine the velocity of the oil at the exit of the pump, in ft/s, and the power required for the pump, in hp. Step 1 * Your answer is incorrect. Determine the velocity of the oil at the exit of the pump, in ft/s. V₂ = i 32.08 ft/s

An oil pump operating at steady state delivers oil at a rate of 13 lb/s through a 1-in-diameter exit pipe. The oil, which can be modeled as incompressible, has a density of 55 lb/ft3 and experiences a pressure rise from inlet to exit of 40 lb/in². There is no significant elevation difference between inlet and exit, and the inlet kinetic energy is negligible. Heat transfer between the pump and its surroundings is negligible, and there is no significant change in temperature as the oil passes through the pump. Determine the velocity of the oil at the exit of the pump, in ft/s, and the power required for the pump, in hp.

3.5 thermodynamics

5.12

Explain why work is not a property of the system.