refrigeration and Air conditioning , heat transfer

The master's office in a ship is L=4.3m long by W=3m wide by H=2.5m high. One bulkhead and the overhead are exposed to the weather as shown in the figure. The bulkhead has one b=65cm by h=99cm window. The design occupancy is N=8 persons and there are N=880W fluorescent lighting fixtures installed. The overall heat transfer coefficient for both the bulkhead and the overhead is U=0.8W/m2.K. Heat transfer through the other boundaries of the office can be neglected. Consider occupant and solar load. X%=49 outside air and (1-X)\% return air are mixed before entering air-conditioning unit. Then mixed air enters the air-conditioning unit. a) Estimate the cooling load of the office. b) Determine mixed air condition (dry bulb temperature and relative humidity () ) on Psychrometric Chart. c) Sketch the air conditioning unit with its components. When necessary, include a reheater in the HVAC unit. d) Show the air-conditioning process on Psychrometric Chart. Specify the drybulb temperature and relative humidity of the air delivered into the room by the air-conditioning device. e) Determine the capacity (in kW) of cooling section and reheater (if needed). f) Calculate the amount of dehumidified water vapor in kg/ day. Troom(c)=25room(%)=54Toutsibe(c)=31outside(%)=73 The master's office in a ship is L=4.3m long by W=3m wide by H=2.5m high. One bulkhead and the overhead are exposed to the weather as shown in the figure. The bulkhead has one b=65cm by h=99cm window. The design occupancy is N=8 persons and there are N=880W fluorescent lighting fixtures installed. The overall heat transfer coefficient for both the bulkhead and the overhead is U=0.8W/m2.K. Heat transfer through the other boundaries of the office can be neglected. Consider occupant and solar load. X%=49 outside air and (1-X)\% return air are mixed before entering air-conditioning unit. Then mixed air enters the air-conditioning unit. a) Estimate the cooling load of the office. b) Determine mixed air condition (dry bulb temperature and relative humidity () ) on Psychrometric Chart. c) Sketch the air conditioning unit with its components. When necessary, include a reheater in the HVAC unit. d) Show the air-conditioning process on Psychrometric Chart. Specify the drybulb temperature and relative humidity of the air delivered into the room by the air-conditioning device. e) Determine the capacity (in kW) of cooling section and reheater (if needed). f) Calculate the amount of dehumidified water vapor in kg/ day. Troom(c)=25room(%)=54Toutsibe(c)=31outside(%)=73