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A building is designed for the following cooling loads. Room specific heat gain and latent heat g...
Question NO. 3 (25 points) A space to be maintained at 27°C dry-bulb temperature has a rate of sensible-heat gain of 13 kW and a rate of latent heat gain of 8.5 kW. The system used to condition t...
Question NO. 3 (25 points) A space to be maintained at 27°C dry-bulb temperature has a rate of sensible-heat gain of 13 kW and a rate of latent heat gain of 8.5 kW. The system used to condition the space to the required conditions. The mass flow rate of air supplied to the space is 1.1 kg/s. Outdoor air at 38 °C dry-bulb temperature and 17 ℃ dew-point temperature is introduced into the system at a rate of 0.28 kg/s....
Subject Refrigeration and Air Conditioning. Please answer in detail. QUESTION 4 - COOLING AND DEHUMIDIFYING COILS...
Subject Refrigeration and Air Conditioning. Please answer in
detail.
QUESTION 4 - COOLING AND DEHUMIDIFYING COILS An air conditioned space at 1700 metres altitude has a sensible heat gain of 26 kW and a latent heat gain of 6.5 kW. The space is maintained at 25°C dry bulb and 18°C wet bulb temperature:s The fresh air supply is to be 0.65 m3/s at 35°C dry bulb and 24°C wet bulb temperatures. The air leaving the coil has a relative humidity...
A summer air conditioning system with recirculating air stream and BPF = 0 has a room sensible heat load of 20 kW and a room latent heat load of 2.22 kW. The required inside conditions are 22\degc and 50% RH, and the outdoor design conditions are 36\degc
A summer air conditioning system with recirculating air stream and BPF = 0 has a room sensible heat load of 20 kW and a room latent heat load of 2.22 kW. The required inside conditions are 22°C and 50% RH, and the outdoor design conditions are 36°C and 60% RH. The mass flow rate of the outside air is 15% of the mass flow rate of the supply air. Find a) RSHF b) the point s on the chart, mass...
Example: The sensible- and latent-heat gains in a space served by a single-zone air conditioner are...
Example: The sensible- and latent-heat gains in a space served by a single-zone air conditioner are 65 and 8 kW, respectively. The space is to be maintained at 24 oC and 50% relative humidity. The design conditions of outdoor air are 35 oC dry-bulb and 25 oC wet-bulb temperatures. For ventilation purposes outdoor air is mixed with recirculated air in a 1:4 proportion. When mixed air at the resulting conditions enters the cooling coil, the outlet air conditions are 12...
3. The air in room is to be maintained at TRA=24C and RHRA=50%. The outdoor air...
3. The air in room is to be maintained at TRA=24C and RHRA=50%. The outdoor air is very hot and extremely dry, at TOA=35C and Tw=16C. The cooling load is 10 kW, of which 60% is sensible. The supplied air is made by evaporative cooling of water into a pre-cooled outdoor air. The injected water has an enthalpy of 200 kJ/kg, and the outdoor air is pre-cooled to the room temperature by a heat exchanger using exhaust air (if the...
a. the sensible heat ratio (SHR) for the cooling and dehumidifying process; (2 Marks) b. the...
a. the sensible heat ratio (SHR) for the cooling and
dehumidifying process; (2 Marks) b. the supply air volume flow rate
to the office in m3 /s; (5 Marks) c. the air dry bulb temperature
and specific enthalpy of the mixture of outdoor and recirculating
air; (4 Marks) d. the cooling coil’s load in kW. (5 Marks) e. the
apparatus dew point during the cooling and dehumidifying process;
and (4 Marks) f. Discuss, with reasons, the possible effects on the...
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temper...
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temperature with mass flow rate of lkg/s determine: i) the contact factor (CF) ii) the volume flow rate iii) the by-pass factor iv) the sensible heat that removed from the outdoor air (1.5 mark) (1.5 marks) (1 mark) (2.0 marks) c) Explain the difference between "relative humidity...
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temper...
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temperature with mass flow rate of lkg/s determine: i) the contact factor (CF) ii) the volume flow rate iii) the by-pass factor iv) the sensible heat that removed from the outdoor air (1.5 mark) (1.5 marks) (1 mark) (2.0 marks) c) Explain the difference between "relative humidity...
O question: An airconditioned space is to be maintained at 26 C dry bulb temperature and 50% RH. ...
o question: An airconditioned space is to be maintained at 26 C dry bulb temperature and 50% RH. The ambient condition is 4 27.78 kW and the latent load is 11.11 kW. 60% of the return air mass is recirculated and mixed with 40% of make-up fresh air before entering the AHU. Calculate: Room SHF -Supply flow rate (m'/sec) (assume supply temperature is 10 C lower than space's) Apparatus sensible and latent load Apparatus sensible heat factor, dew point, and...
Prob. # 2] The temperature to be maintained in an office building is 26 C DB heat is 77.6 kW and the latent heat gain is 14.3 kW. Th accomplished by passing it through a spray-type heated to 18 C...
Prob. # 2] The temperature to be maintained in an office building is 26 C DB heat is 77.6 kW and the latent heat gain is 14.3 kW. Th accomplished by passing it through a spray-type heated to 18 C then supplied to the room. Find and 18 C W B. The sensible e cooling and dehumidifying of the air is washer with water chilled by refrigeration. The air is then a. the apparatus dew point temperature of washer, b....
Question NO. 3 (25 points) A space to be maintained at 27°C dry-bulb temperature has a rate of sensible-heat gain of 13 kW and a rate of latent heat gain of 8.5 kW. The system used to condition the space to the required conditions. The mass flow rate of air supplied to the space is 1.1 kg/s. Outdoor air at 38 °C dry-bulb temperature and 17 ℃ dew-point temperature is introduced into the system at a rate of 0.28 kg/s....
Subject Refrigeration and Air Conditioning. Please answer in
detail.
QUESTION 4 - COOLING AND DEHUMIDIFYING COILS An air conditioned space at 1700 metres altitude has a sensible heat gain of 26 kW and a latent heat gain of 6.5 kW. The space is maintained at 25°C dry bulb and 18°C wet bulb temperature:s The fresh air supply is to be 0.65 m3/s at 35°C dry bulb and 24°C wet bulb temperatures. The air leaving the coil has a relative humidity...
a. the sensible heat ratio (SHR) for the cooling and
dehumidifying process; (2 Marks) b. the supply air volume flow rate
to the office in m3 /s; (5 Marks) c. the air dry bulb temperature
and specific enthalpy of the mixture of outdoor and recirculating
air; (4 Marks) d. the cooling coil’s load in kW. (5 Marks) e. the
apparatus dew point during the cooling and dehumidifying process;
and (4 Marks) f. Discuss, with reasons, the possible effects on the...
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temperature with mass flow rate of lkg/s determine: i) the contact factor (CF) ii) the volume flow rate iii) the by-pass factor iv) the sensible heat that removed from the outdoor air (1.5 mark) (1.5 marks) (1 mark) (2.0 marks) c) Explain the difference between "relative humidity...
b) A cooling coil of an Air Handling Unit has dew-point of 8'C dry-bulb (db) temperature, and outdoor air enters the cooling equipment at 28 C d.b temperature and leaves at 16'C d.b temperature with mass flow rate of lkg/s determine: i) the contact factor (CF) ii) the volume flow rate iii) the by-pass factor iv) the sensible heat that removed from the outdoor air (1.5 mark) (1.5 marks) (1 mark) (2.0 marks) c) Explain the difference between "relative humidity...
o question: An airconditioned space is to be maintained at 26 C dry bulb temperature and 50% RH. The ambient condition is 4 27.78 kW and the latent load is 11.11 kW. 60% of the return air mass is recirculated and mixed with 40% of make-up fresh air before entering the AHU. Calculate: Room SHF -Supply flow rate (m'/sec) (assume supply temperature is 10 C lower than space's) Apparatus sensible and latent load Apparatus sensible heat factor, dew point, and...
Prob. # 2] The temperature to be maintained in an office building is 26 C DB heat is 77.6 kW and the latent heat gain is 14.3 kW. Th accomplished by passing it through a spray-type heated to 18 C then supplied to the room. Find and 18 C W B. The sensible e cooling and dehumidifying of the air is washer with water chilled by refrigeration. The air is then a. the apparatus dew point temperature of washer, b....
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