A window air-conditioner unit is placed on a laboratory bench and tested in cooling mode using 0.75 Btu/s of electric power with a COP of 1.75. What is the cooling power capacity and what is the net effect on the laboratory?

# Category: Statistics

## A water-heater is covered up with insulation boards

A water-heater is covered up with insulation boards over a total surface area of 30 ft2. The inside board surface is at 175 F and the outside surface is at 70 F and the board material has a conductivity of 0.05 Btu/h ft F. How thick a board should it be to limit the heat transfer loss to 720 Btu/h?

## A window air-conditioner unit is placed

A window air-conditioner unit is placed on a laboratory bench and tested in cooling mode using 750 W of electric power with a COP of 1.75. What is the cooling power capacity and what is the net effect on the laboratory?

## A water-filled reactor with volume of 50 ft3 is at

A water-filled reactor with volume of 50 ft3 is at 2000 lbf/in 2, 560 F and placed inside a containment room. The room is well insulated and initially evacuated. Due to a failure, the reactor ruptures and the water fill the containment room. Find the minimum room volume so the final pressure does not exceed 30 lbf/in 2.

## A water-filled reactor with volume of 1 m3 is at 20 MPa, 360C

A water-filled reactor with volume of 1 m3 is at 20 MPa, 360?C and placed inside a containment room. The room is well insulated and initially evacuated. Due to a failure, the reactor ruptures and the water fill the containment room. Find the minimum room volume so the final pressure does not exceed 200 kPa.

## A water-filled reactor with volume of 1 m3 is at 20 MPa

A water-filled reactor with volume of 1 m3 is at 20 MPa, 360°C and placed inside a containment room as shown in Fig. P5.48. The room is well insulated and initially evacuated. Due to a failure, the reactor ruptures and the water fill the containment room. Find the minimum room volume so the final pressure does not exceed 200 kPa.

## A water-filled reactor of 50 ft3 is at 2000 lbf/in

A water-filled reactor of 50 ft3 is at 2000 lbf/in 2, 550 F and located inside an insulated containment room of 5000 ft3 that has air at 1 atm. and 77 F. Due to a failure the reactor ruptures and the water fills the containment room. Find the final pressure.

## A washing machine has 2 kg of clothes spinning at a rate

A washing machine has 2 kg of clothes spinning at a rate that generates an acceleration of 24 m/s2. What is the force needed to hold the clothes?

## A wall surface on a house is at 30°C

A wall surface on a house is at 30°C with an emissivity of ? = 0.7. The surrounding ambient to the house is at 15°C, average emissivity of 0.9. Find the rate of radiation energy from each of those surfaces per unit area.