When cooling 27,000 cfm of air from a temperature of 90 F and a relative humidity...
When cooling 27,000 cfm of air from a temperature of 90 F and a relative humidity of 55% to a temperature of 60 F and 100% relative humidity, the ratio of sensible heat removed from the air to total heat removed from the air is:
Homework Answers
Add Answer to:
When cooling 27,000 cfm of air from a temperature of 90 F and a
relative humidity...
Moist air enters a cooling coil at 27°C DBT and 60 percent relative humidity at a...
Moist air enters a cooling coil at 27°C DBT and 60 percent relative humidity at a flow rate of 1.15 kg/s and leaves at 16°C DBT and 90 percent relative humidity. Calculate the latente load on the coil, the sensible heat ratio and the bypass factor.
The atmospheric air 32 °C dry bulb temperature and 70% relative humidity supplied to the cooling...
The atmospheric air 32 °C dry bulb temperature and 70% relative humidity supplied to the cooling coil at a rate of 45m3/min. The air cooling to the saturated state and leaving at a temperature of 16 °C. Determine: a- Specific humidity at each state. b- Wet bulb and dew point temperatures at the final state c- Final relative humidity. d- Mass of water condensed. e- Rate of heat removed from the air in kW. f- Show the process on Psychrometric...
Q.3 Outside air at 90°F, 1 atm, and 95% relative humidity with a flow rate of...
Q.3 Outside air at 90°F, 1 atm, and 95% relative humidity with a flow rate of 4000 cfm is blown over an evaporator of a refrigeration system and exits at 75°F and 60% relative humidity. The refrigeration system has operating with the COP of 2.5. Determine (a) the amount of cooling provided by the evaporator Btu/hr (b) the amount of water condensed in the evaporator, lbm/hr and (c) the power required by the compressor of the refrigerator in kW. 1...
2. An air conditioning system is to take in air at latm 33C, 70% relative humidity...
2. An air conditioning system is to take in air at latm 33C, 70% relative humidity and flow rate of 50m3/min and deliver it 23C and 60% relative humidity. The air first flows over the cooling coils, where it is cooled and dehumidified, and then over the resistance heating wires, where it is heated to the desired temperature. Assuming that the condensate is removed from the cooling section at 10C, determine: a) The temperature of the air before it enters...
Atmospheric air at 32°C and 70% relative humidity passes through a cooling section in an air-conditioning...
Atmospheric air at 32°C and 70% relative humidity passes through a cooling section in an air-conditioning duct where the air is cooled below its dew point and some of the water is removed. The air then passes over a heating section where heat is added until the final temperature is 22°C and the relative humidity is 45%. Assume the process occurs at constant pressure of 1 atm. Using the psychrometric chart, determine: (a) The amount of water removed in the...
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...
Air enters a cooling section of 40-cm-diameter at 1 atm, 32°C, and 30 percent relative humidity...
Air enters a cooling section of 40-cm-diameter at 1 atm, 32°C, and 30 percent relative humidity at 18 m/s. Heat is removed from the air at a rate of 1200 kJ/min. Determine: (a) the exit temperature (b) the exit relative humidity of the air (c) the exit velocity.
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...
PH) 3) Air at a temperature of 60 F and a relative humidity of 60% with...
PH) 3) Air at a temperature of 60 F and a relative humidity of 60% with a flow rate of 1000 # 3/min enters a warm-air furnace and humidifier unit. The air leaves the unit at a temperature of 120 F and a relative humidity of 12%. If the air flows through the unit at a pressure of 14.5 psia and if the water is supplied to the humidifier at 65 F, using the appropriate equations, determine: a) the mass...
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...
Q.3 Outside air at 90°F, 1 atm, and 95% relative humidity with a flow rate of 4000 cfm is blown over an evaporator of a refrigeration system and exits at 75°F and 60% relative humidity. The refrigeration system has operating with the COP of 2.5. Determine (a) the amount of cooling provided by the evaporator Btu/hr (b) the amount of water condensed in the evaporator, lbm/hr and (c) the power required by the compressor of the refrigerator in kW. 1...
2. An air conditioning system is to take in air at latm 33C, 70% relative humidity and flow rate of 50m3/min and deliver it 23C and 60% relative humidity. The air first flows over the cooling coils, where it is cooled and dehumidified, and then over the resistance heating wires, where it is heated to the desired temperature. Assuming that the condensate is removed from the cooling section at 10C, determine: a) The temperature of the air before it enters...
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...
PH) 3) Air at a temperature of 60 F and a relative humidity of 60% with a flow rate of 1000 # 3/min enters a warm-air furnace and humidifier unit. The air leaves the unit at a temperature of 120 F and a relative humidity of 12%. If the air flows through the unit at a pressure of 14.5 psia and if the water is supplied to the humidifier at 65 F, using the appropriate equations, determine: a) the mass...
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...
Most questions answered within 3 hours.
-
1/ Using ________________ as they are intended is the best
guarantee for consistency and forward compatibility....
asked 2 minutes ago -
Portfolio theory
Given the following information about firm A and the
market:δ
E (Rm)= 12 per...
asked 27 seconds from now -
Albert files his income tax return (showing a total tax of
$23,000) 5½ months after the...
asked 3 minutes ago -
This exercise involves you using imagination and logical
reasoning to occupy the mindset of a visualiser...
asked 12 minutes ago -
What kinds of storage have you seen in use during your own
lifetime?
asked 14 minutes ago -
Practicing Acid Base Calculations
Cameco in Port Hope, Ontario uses hydrofluoric acid to make a
uranium...
asked 21 minutes ago -
The gross payoffs (X) from the investment have the following
probability mass function.
x
p(x)
0...
asked 28 minutes ago -
In an aqueous mixture of aluminum, lead, and iron salts, which
of these will be reduced...
asked 44 minutes ago -
The probability of college students in the US is given by P(A)=
0.06. The probability of...
asked 27 minutes ago -
Water is needed to supply a canal system, which may require up
to 30m3 s -1...
asked 32 minutes ago -
A stubborn dog is being walked on a leash by its owner. At one
point, the...
asked 37 minutes ago -
To convert the money spent on the basket to a useable figure,
economists arbitrarily choose the...
asked 37 minutes ago