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HVAC
3. A conditioned space is to be maintained at 75 F and 50% relative humidity....
HVAC (1) Single Loop HVAC system: A space is to be maintained at 75 °FDB and...
HVAC
(1) Single Loop HVAC system: A space is to be maintained at 75 °FDB and 50 % relative humidity Outdoor air is at 95 °FDB and 60 % relative humidity. Mark these psychrometric states on a psych chart clearly with small circles labeled "RA" and "OA". The space has a heat load of 100,000 BTU/hr and a moisture gain of 30 lbm-whr. Assume that the enthalpy of this moisture is 1100 BTU/lbm-w. Determine the values indicated below, and fill...
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...
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...
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...
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:...
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...
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....
Please explain every thing and show me even your small detail >> thank you (its very...
Please explain every thing and show me even your small detail
>> thank you (its very important to me)
Saturated air at 40 F is first preheated and then saturated adiabatically. This saturated air is then heated to a final condition of 105F and 28% RH. To what temperature must initially be heated in the preheat coil? (use Psychrometry chart & Show all detail statements in your answer.) Find a) Show the processes on the psychrometric chart. b) To what...
On the psychrometric chart provided mark clearly the point for air with a dry bulb temperature...
On the psychrometric chart provided mark clearly the point for
air with a
dry bulb temperature of 30oC and a Percentage Saturation
of 80%.
At this air condition, by referring to the same chart, what are the
values of
wet bulb temperature, specific volume, moisture content in kg/kg
(dry air)
and enthalpy.
If the air is air-conditioned to 15oC dry bulb and a
Percentage Saturation of
60, what is the associated enthalpy drop.
NAT BEBE Reduced scale CIBSE psychrometric chart...
Exhaust Air Heat Wheel Return Air HRU Outlet Ventilation Air Wheel Type Total HRU .8 Two...
Exhaust Air Heat Wheel Return Air HRU Outlet Ventilation Air Wheel Type Total HRU .8 Two types of heat recovery units. CHAPTER 4 PROBLEMS 4.1 A sling psychrometer measures the air tempera- tures to be 85°F dry bulb and 72°F wet bulb. Find: relative humidity, dew-point temperature, humidity ratio (in lbmv/lbma and grains), specific volume, and enthalpy. Show results on a chart and verify with the program PsychProcess.xls (on the accom- panying CD). Assume sea level elevation. 4.2 Air flowing...
HVAC
(1) Single Loop HVAC system: A space is to be maintained at 75 °FDB and 50 % relative humidity Outdoor air is at 95 °FDB and 60 % relative humidity. Mark these psychrometric states on a psych chart clearly with small circles labeled "RA" and "OA". The space has a heat load of 100,000 BTU/hr and a moisture gain of 30 lbm-whr. Assume that the enthalpy of this moisture is 1100 BTU/lbm-w. Determine the values indicated below, and fill...
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...
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...
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...
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....
Please explain every thing and show me even your small detail
>> thank you (its very important to me)
Saturated air at 40 F is first preheated and then saturated adiabatically. This saturated air is then heated to a final condition of 105F and 28% RH. To what temperature must initially be heated in the preheat coil? (use Psychrometry chart & Show all detail statements in your answer.) Find a) Show the processes on the psychrometric chart. b) To what...
On the psychrometric chart provided mark clearly the point for
air with a
dry bulb temperature of 30oC and a Percentage Saturation
of 80%.
At this air condition, by referring to the same chart, what are the
values of
wet bulb temperature, specific volume, moisture content in kg/kg
(dry air)
and enthalpy.
If the air is air-conditioned to 15oC dry bulb and a
Percentage Saturation of
60, what is the associated enthalpy drop.
NAT BEBE Reduced scale CIBSE psychrometric chart...
Exhaust Air Heat Wheel Return Air HRU Outlet Ventilation Air Wheel Type Total HRU .8 Two types of heat recovery units. CHAPTER 4 PROBLEMS 4.1 A sling psychrometer measures the air tempera- tures to be 85°F dry bulb and 72°F wet bulb. Find: relative humidity, dew-point temperature, humidity ratio (in lbmv/lbma and grains), specific volume, and enthalpy. Show results on a chart and verify with the program PsychProcess.xls (on the accom- panying CD). Assume sea level elevation. 4.2 Air flowing...
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