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Determine the exergy transfer accompanying heat and the exergy destruction, each in Btu, for an enlarged system that includes the air and the wall, assuming that the state of the wall remains unchan
A rigid tank contains 0.1-kg of air at 300 kPa and 300 kelvin. The air is now heated until the pressure doubles. determine the a) the final pressure in the tank (kPa); b) the volume of the tank (m^3
During a cold day, it is observed that the appliances all run continuously but the air temperature remains constant. What is the rate of heat loss from the room?
Determine (a) the effectiveness of the regenerator, (b) the rate of heat removal from the refrigerated space, and (c) the COP of the cycle.
Draw a schematic diagram of the cycle and start with the naming point 1 the inlet of steam to the turbine and then pt. 2 is the exit from the turbine etc.
Which is then restored to its initial T and P. As a result of the process, does the total number of moles of liquid increase, decrease, or remain unchanged? and Why?
Determine (a) the degrees of subcooling of the refrigerant in the condenser, (b) the mass flow rate of the refrigerant, (c) the heating load and the COP of the heat pump.
Assuming the turbines and the pumps to be isentropic, and determine the mass flow rate of steam through the boiler for a net power output of 15 MW.
Determine: the net work per cycle in kJ, the power developed by the engine in kW if the cycle is executed 1000 times per minute and the ccyle thermal efficiency. Assume the cold-air standard approxi
The thermal conductivity varies linearly with temperature from k0 at T0 to k1 at T1. Using a shell balance, find the temperature distribution and develop an expression for the heat flow through the
What do the velocity triangles for two axial compressors in series with 50% degree of reaction look like? They have purely axial inlet and outlet flow.
Determine (a) the mass flow rate of isobutene in the binary cycle, (b) the net power outputs of both the flashing and the binary sections of the plant.
Determine (a) the degrees of subcooling of the refrigerant in the condenser, (b) the mass flow rate of the refrigerant, (c) the heating load and the COP of the heat pump
Calculate the mass of water in kg that can be heated for the soup. Is it worth heating the water to make the soup. How much thermal energy will each hiker receive if they drink all the soup.
Find the potential energy of the weight at the top of the tower and what the velocity of the glider will be after the energy is transferred to it.
A freely moving piston holds in 10kg of water at a pressure 400kPa and volume 10m^3. The water is cooled to 400*c. Find the final pressure, the final volume and the heat transfer from water.
Below the 5cm thick asphault with an average conductivity of 0.1 w/(mK) is a layer of compacted rubble at a temperature of 20*c. Find the rate of heat transfer to the rubble.
Find the: initial volume, the temperature at which ammonia starts to vaporize, the approximate volume when it starts to vaporize, the final volume when the quality reaches 0.1
The plate centered directly on top of the pedestal. The plate has a weight of 54 lbs and a modulus of E. What is the deflection equation in terms of the distance, X?
The coefficient of kinetic friction between sled and ice is 0.105. Use energy considerations to find the distance the sled moves before it stops.
After the block is released from rest, it travels upward and then leaves the spring. To what maximum height above the point of release does it rise?
The system also experiences a decrease in internal energy by 100 kJ, and an increase in potential energy of the center of mass by 100 kJ. Determine whether the center of mass accelerates, decelerate
Now take the gas in the cylinder alone as your system. Find the work done on the system (gas alone) in kJ. What is work in kJ to overcome friction?