A room is to be air conditioned in the summer using water-cooled coils. The return air to air cooling unit has a sensibl...
A room is to be air conditioned in the summer using water-cooled coils. The return air to air cooling unit has a sensible heat load of 100,000 Btu/hr and a latent heat load of 40,000 Btu/hr. The total heat load of the air going to the outside is 80,000 Btu/hr. Water enters the cooling coil at 40 deg.F and exits at 52 deg.F. From the total heat load on the room, use the result for water flow found above in problem 5c to find the flow rate of water in the cooling coils in gpm. (Answer: 37 gpm)
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A room is to be air conditioned in the summer using water-cooled coils. The return air to air cooling unit has a sensibl...
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...
An Conference Center is to be air-conditioned for a seating capacity of 3200 people for the...
An Conference Center is to be air-conditioned for a seating capacity of 3200 people for the following outdoor and comfort conditions a) Outdoor design conditions = 35 °C, db and 65% R.H b) Indoor/return design conditions-26 deg C. db and 55% RH. c) Total sensible room load = 420,000 kJ/hr d) Total latent room load = 200,000 KJ/hr e) The rise in dry bulb temperature of the air inside the conference center is limited to 9 °C (i.e. the Supply...
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 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...
3. A room is to be maintained at 75 deg.F db. 3500 cfm of air is...
3. A room is to be maintained at 75 deg.F db. 3500 cfm of air is ventilated from this room. The sensible heat load on the room is 70,000 Btu/hr. From the air conditioning equation, what is the db temperature of the air ventilated from the room? The ventilated air is 30% rh. What is the wb temperature of the air ventilated from the room? What is the density of the ventilated air? What is the mass flow rate of...
HVAC 3. A conditioned space is to be maintained at 75 F and 50% relative humidity....
HVAC
3. A conditioned space is to be maintained at 75 F and 50% relative humidity. Mark this state on the chart as ". @P6 RA". The load on this space is known to have an enthalpy to humidity ratio or psychrometric slope of 4000 BTU/Ibm. The supply air is provided at 55 F. Mark the SA state as OP6 SA What is the enthalpy for the SA found by using the chart? What is the humidity ratio for the...
QUESTION 2 [20 Marks] An air conditioned room that stands on a well ventılated basement measures...
QUESTION 2 [20 Marks] An air conditioned room that stands on a well ventılated basement measures 3 m wide high and 6 m deep One of the two 3 m walls faces west and contains a do window of sıze 1 5 m by 1 5 m, mounted flush with the wall with no external s shading T the follo are no heat gains through the walls other than the one facing east From nformation Inside conditions 25 °C dry...
Please show work and explain how and why each step is used. Use psychrometric chart. 3....
Please show work and explain how and why each step is used. Use
psychrometric chart.
3. A portion of a museum is required to be conditioned to 75°F/50% RH year round. Since it's a museum, the humidity must be controlled. Under design conditions, this portion of the museum has sensible cooling loads of 35,000 Btu/hr and latent cooling loads of 15,000 Btu/hir The air handler (Figure 1) designed to maintain conditions has a cooling coil, a reheat coil, and a...
a. Calculate the dry air and water vapor mass flow rates (lb/min) if the volume flow...
a. Calculate the dry air and water vapor mass flow rates (lb/min) if the volume flow rate is 1,000 cfm, the humidity ratio is 0.025 lbv/lba, and the dry air density is 0.072 Iba/ft3. b. Assume the above air enters an evaporator coil at 90°F where it is cooled in a constant humidity ratio process until reaching the 100 % RH curve ( the temperature at that point is the dew point. The air then keeps dropping in temperature, following...
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...
An Conference Center is to be air-conditioned for a seating capacity of 3200 people for the following outdoor and comfort conditions a) Outdoor design conditions = 35 °C, db and 65% R.H b) Indoor/return design conditions-26 deg C. db and 55% RH. c) Total sensible room load = 420,000 kJ/hr d) Total latent room load = 200,000 KJ/hr e) The rise in dry bulb temperature of the air inside the conference center is limited to 9 °C (i.e. the Supply...
3. A room is to be maintained at 75 deg.F db. 3500 cfm of air is ventilated from this room. The sensible heat load on the room is 70,000 Btu/hr. From the air conditioning equation, what is the db temperature of the air ventilated from the room? The ventilated air is 30% rh. What is the wb temperature of the air ventilated from the room? What is the density of the ventilated air? What is the mass flow rate of...
HVAC
3. A conditioned space is to be maintained at 75 F and 50% relative humidity. Mark this state on the chart as ". @P6 RA". The load on this space is known to have an enthalpy to humidity ratio or psychrometric slope of 4000 BTU/Ibm. The supply air is provided at 55 F. Mark the SA state as OP6 SA What is the enthalpy for the SA found by using the chart? What is the humidity ratio for the...
QUESTION 2 [20 Marks] An air conditioned room that stands on a well ventılated basement measures 3 m wide high and 6 m deep One of the two 3 m walls faces west and contains a do window of sıze 1 5 m by 1 5 m, mounted flush with the wall with no external s shading T the follo are no heat gains through the walls other than the one facing east From nformation Inside conditions 25 °C dry...
Please show work and explain how and why each step is used. Use
psychrometric chart.
3. A portion of a museum is required to be conditioned to 75°F/50% RH year round. Since it's a museum, the humidity must be controlled. Under design conditions, this portion of the museum has sensible cooling loads of 35,000 Btu/hr and latent cooling loads of 15,000 Btu/hir The air handler (Figure 1) designed to maintain conditions has a cooling coil, a reheat coil, and a...
a. Calculate the dry air and water vapor mass flow rates (lb/min) if the volume flow rate is 1,000 cfm, the humidity ratio is 0.025 lbv/lba, and the dry air density is 0.072 Iba/ft3. b. Assume the above air enters an evaporator coil at 90°F where it is cooled in a constant humidity ratio process until reaching the 100 % RH curve ( the temperature at that point is the dew point. The air then keeps dropping in temperature, following...
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