A household radiator has an inlet temperature of 73.2 oC and an outlet temperature of 42.5 oC. The water flows through the radiator at a steady rate of 1×10-5 m3 s-1 and the radiator has reached a steady temperature. Given that the density of water is 1000 kg m-3 and its specific heat capacity is 4200 J kg-1 K-1, calculate the rate of heat loss (in W or J s-1) from the radiator.

Steam enters a cylinder fitted with a piston at a pressure of 30 MN/m2 and a temperature of 550 deg C. The steam expands to a pressure of 300 kN/m2 and a temperature of 300o deg C. During the expansion there is a net heat loss from the steam through the walls of the cylinder and piston of 140 kJ/kg. Determine the .displacement work done by one kg of steam during this expansion

A pump delivers 4m3/min of water from 100kpa to 300kpa. The inlet and outlet pipe diameters are 15cm and 12cm respectively. Both pipes are on the same level. The inlet and outlet temperatures are both 25C and mass density of water is 997kg/m3. Calculate the pump work in kw. ANSWER: 14

the enthalpy of air is increased by 140 kJ/kg in a compressor. the rate of air flow is 16.42 kg/min. the power output is 48.2 kW. what is the heat loss from the compressor? in kW

The average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8  10-4 kW/m · °C, and their average thickness is 21.6 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of 9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 27.4°C if the outside temperature is 0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground. m3

Hot and cold liquid water are sent through a mixing chamber. The device is not insulated and the water exiting is warmer than the cold water entering. Which terms in the energy equation are not zero? (Click all that apply) Qin Win Qout Wout V Emi - Eme O APE O AKE O AEsys

The average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8  10-4 kW/m · °C, and their average thickness is 20.8 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of 9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 25.9°C if the outside temperature is 0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground.

A piston of mass 60 kg sits in a cylinder containing water vapour. The diameter of the piston is 20 cm. There is a spring connected above the piston which is originally unstretched, and has a spring constant of 50 kN/m. The piston moves upwards a distance of 5 cm while 200 J of heat is added. Calculate the change in internal energy of the water vapour.

Given that for a flow process the steady flow equation is

A horizontal pipe with a constantdiameter of 0.04 mhas a skady flaw of Refnigerant 134a entering at 300 kla 40°C, and a mass flow rate of 0.6 kg/sec, and leaving at l 240 kla and 50°C Deteminethe magnitude of the rate Of heat transfer between the pipe and its Surroundungs in kW using 5 signifigant figures. quoLg SMt gunb ot pn