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 oC and 100% relative humidity (i.e. the condition of air entering the space).
In the previous example if the outdoor temperature is 22 oC and the relative humidity is 80%, which is better from energy savings perspective: To use 100% outdoor air, or to use 100% recirculated air?
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Example: The sensible- and latent-heat gains in a space served
by a single-zone air conditioner are...
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....
A building is designed for the following cooling loads. Room specific heat gain and latent heat g...
A building is designed for the following cooling loads. Room specific heat gain and latent heat gains are 310 kW and 100 kW respectively. The room is maintained at a dry bulb temperature of 25°C and relative humidity of 50%. The outdoor air is at 28°C with 50% relative humidity, 10% by mass of outdoor air is supplied to the building. If the air supplied to the room should be at a temperature lower than 18°C, detemine the following. (a)...
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...
PROBLEM 2. (20 POINTS) A space to be maintained at 25 C dB (dry bulb) temperature and 18°C wB (we...
PROBLEM 2. (20 POINTS) A space to be maintained at 25 C dB (dry bulb) temperature and 18°C wB (wet bulb) has a rate of sensible-heat gain of 25 kWand a rate of moisture gain of20 kg/hr. Moist air enters the space at a dry-bulb temperature of 15°C. Outdoor air at 35 C dB temperature and 25 C wB is supplied for ventilation purposes at a rate of 400 Us (litres per second) of standard air. After leaving the room,...
In an air-conditioned office, the dry bulb temperature of the supply air is 15°C. The state...
In an air-conditioned office, the dry bulb temperature of the supply air is 15°C. The state of air in the office has dry bulb temperature of 26°C and relative humidity of 52%. By using anemometer, it is measured that the flow rate of the recirculated air is 60.34 m3 /min. The HVAC system takes 18 m3 /min of outdoor air at 35°C and 55% relative humidity. The sensible heat ratio for the cooling coil is known to be 50%. Determine:...
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...
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...
× Question "6.10: A dual path or DOAS system is proposed for teh supermarket application. Determi...
Requesting for solutions pertaining to this questions
only thank you.
× Question "6.10: A dual path or DOAS system is proposed for teh supermarket application. Determine the energy required for both coils. The operating ourdoor air conditions are 35 C and 60% relative humidity. The building is to be maintained at 22 C and 50% relative humidity. The circulation flow rate is 45,000 L/s and the ventilation air requirement is varied so that the load is met. The building load...
a) What is the difference between latent and sensible heat gains in building cooling load analysis?...
a) What is the difference between latent and sensible heat gains in building cooling load analysis? Provide examples of each (2 marks) b) In heating load calculations, it is a normal practice to neglect the solar heat gain Explain why. (2 marks) c) An air conditioned single family detached house with a Figure_Q6A is located in Perth, Australia (Latitude 31° South). The ceiling height is 24 m. The summer floor plan shown in design indoor temperature is 25°C. Outside design...
A motel in Miami, Florida has a sensible cooling load of 75 tons and a sensible...
A motel in Miami, Florida has a sensible cooling load of 75 tons and a sensible heat ratio on the building of 0.85. Each of the motel's 100 rooms must be supplied with 30 cfm of outside air to satisfy the local ventilation codes. If the rooms are kept at 75F and 50% R.H., determine: a.) sketch of the system b.) Air flow to the building in cfm (fan size) c.) The mixed air condition-temperature and humidity d.) The cooling...
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....
A building is designed for the following cooling loads. Room specific heat gain and latent heat gains are 310 kW and 100 kW respectively. The room is maintained at a dry bulb temperature of 25°C and relative humidity of 50%. The outdoor air is at 28°C with 50% relative humidity, 10% by mass of outdoor air is supplied to the building. If the air supplied to the room should be at a temperature lower than 18°C, detemine the following. (a)...
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...
PROBLEM 2. (20 POINTS) A space to be maintained at 25 C dB (dry bulb) temperature and 18°C wB (wet bulb) has a rate of sensible-heat gain of 25 kWand a rate of moisture gain of20 kg/hr. Moist air enters the space at a dry-bulb temperature of 15°C. Outdoor air at 35 C dB temperature and 25 C wB is supplied for ventilation purposes at a rate of 400 Us (litres per second) of standard air. After leaving the room,...
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...
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...
Requesting for solutions pertaining to this questions
only thank you.
× Question "6.10: A dual path or DOAS system is proposed for teh supermarket application. Determine the energy required for both coils. The operating ourdoor air conditions are 35 C and 60% relative humidity. The building is to be maintained at 22 C and 50% relative humidity. The circulation flow rate is 45,000 L/s and the ventilation air requirement is varied so that the load is met. The building load...
a) What is the difference between latent and sensible heat gains in building cooling load analysis? Provide examples of each (2 marks) b) In heating load calculations, it is a normal practice to neglect the solar heat gain Explain why. (2 marks) c) An air conditioned single family detached house with a Figure_Q6A is located in Perth, Australia (Latitude 31° South). The ceiling height is 24 m. The summer floor plan shown in design indoor temperature is 25°C. Outside design...
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