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An evaporative cooling tower removes 1 x 106 Btu/hr of heat from the cooling water from...
Problem -4 (200) In the condenser of a power plant, energy is discharged by heat transfer...
Problem -4 (200) In the condenser of a power plant, energy is discharged by heat transfer at a rate of 853035 Btu/s to cooling water that exits the condenser at 110°F into a cooling tower. Cooled water at 64°F is returned to the condenser. Atmospheric air enters the tower at 80°F, 1 atm, 30% relative humidity. Moist air exits at 98°F, 1 atm, 95% relative humidity. Makeup water is supplied at 64°F. For operation at steady state, determine (a) Draw...
fluid 12 6 Problem 5.12 An evaporative cooling tower (see the figure below) is used to...
fluid
12 6 Problem 5.12 An evaporative cooling tower (see the figure below) is used to cool water from 110 to 80 °F . Water enters the tower at a rate of 250,000 lbm/hr. Dry air (no water vapor) flows into the tower at a rate of 151,000 lbm/hr. If the rate of wet airflow out of the tower is 156,900 Ibm/hr. determine the rate of water evaporation in lbm/hr and the rate of cooled water flow in lbm/hr. Wet...
4 AAA 4 An 11111111111 water from condenser - =6000 gal/hr Ten=95°F water to condenser +...
4 AAA 4 An 11111111111 water from condenser - =6000 gal/hr Ten=95°F water to condenser + air Tamb= 74°F Pamb=0.5 Ve=10,000 cfm makeup water T = 80°F Figure 1: Cooling tower. The cooling tower is designed to cool water from the condenser of a large air conditioning system that enters with a flow rate V =6,000 gallons per hour with temperature Twin = 95°F. Outdoor air at Tamb = 74°F and Pamb = 50% relative humidity is forced through the...
Water entering a wet cooling tower at 35°C at a rate of 100 kg/s is cooled to 22°C in the cooling tower by air that enters the tower at 1 atm, 20°C, and 60% relative humidity and leaves saturated at 3...
Water entering a wet cooling tower at 35°C at a rate of 100 kg/s
is cooled to 22°C in the cooling tower by air that enters the tower
at 1 atm, 20°C, and 60% relative humidity and leaves saturated at
30°C. The makeup water of 22°C is supplied to the outlet to make
the mass flow rate of the cool water the same as that at the inlet,
see Figure Q5.
Q.5Water entering a wet cooling tower at 35°C at...
A combined gas-steam power plant uses a simple gas turbine for the topping cycle and a...
A combined gas-steam power plant uses a simple gas turbine for
the topping cycle and a simple Rankine cycle for the bottoming
cycle. Atmospheric air enters the compressor at 101 kPa and 20 °C,
and the maximum gas cycle temperature is 1100 °C. The
compressor pressure ratio is 8. The gas stream leaves the heat
exchanger at the saturation temperature of the steam flowing
through the heat exchanger. Steam enters the heat exchanger at a
pressure of 6 MPa and...
The figure below shows a condenser/cooling tower pipe system needed to remove heat from a water...
The figure below shows a condenser/cooling tower pipe system needed to remove heat from a water cooled refrigeration condenser and reject the heat to the atmosphere. The amount of heat to be rejected to the atmosphere is 480,000 Btu/hr. The water enters the condenser at 85"F, and the temperature rise of the water through the condenser is 10°F. The total length of the piping in the system is 60 ft. Fittings are as shown. Assume bends to be as shown...
Mass Flow Rate Problem
Water exiting the condenser of a power plant at 38ºC enters a cooling tower with a massflow rate of 4.5 x 107 kg/h. A stream of cooled water is returned to the condenser from acooling tower with a temperature of 30ºC and the same flow rate. Makeup water is addedin a separate stream at 20ºC. Atmospheric air enters the cooling tower at 25ºC and 35%relative humidity. Moist air exits the tower at 30ºC and 95% relative humidity.Determine the mass flow...
Moist air at 24°C, 1 atm, and 35% relative humidity enters an evaporative cooling unit operating...
Moist air at 24°C, 1 atm, and 35% relative humidity enters an evaporative cooling unit operating at steady state consisting of a heating section followed by a soaked pad evaporative cooler operating adiabatically. The air passing through the heating section is heated to 45°C. Next, the air passes through a soaked pad exiting with 50% relative humidity. Using data from the psychrometric chart, determine: (a) the humidity ratio of the entering moist air mixture, in kg(vapor) per kg(dry air). (b)...
COOLING TOWER PERFORMANCE
The cooling tower in a power plant consists of ten big fans. The quantity of cooling water circulated through the tower is 1000kg/min and it is cooled from 35oC DBT and 25oC WBT. The air leaves the tower at 30oC and 90% R.H. Find: (i) The quantity of air handled per fan per minute.(ii) The quantity of make-up water per hour neglecting the loss due to carry over and heat losses.
Problem: Feasibility Study of Recovering Waste Heat from Primary Process Cooling Water to Provide Heat for...
Problem: Feasibility Study of Recovering Waste Heat from Primary Process Cooling Water to Provide Heat for a Secondary Process Primary Process Cooling Water 100 F Secondary Process Requirements: Heat Supply Rate of 330,000 BTU/hr at 150 F Recovery System Heat Pump R134a Compressor Isentropic Efficiency: 76% Design Values Evaporator Coil Design Pressure: 160 psi Condenser Coil Design Pressure: 300 psi Deliverables Design Coil Temperatures (Evaporator and Condenser) - Confirm that these will be consistent with temperatures at the heat source...
Problem -4 (200) In the condenser of a power plant, energy is discharged by heat transfer at a rate of 853035 Btu/s to cooling water that exits the condenser at 110°F into a cooling tower. Cooled water at 64°F is returned to the condenser. Atmospheric air enters the tower at 80°F, 1 atm, 30% relative humidity. Moist air exits at 98°F, 1 atm, 95% relative humidity. Makeup water is supplied at 64°F. For operation at steady state, determine (a) Draw...
fluid
12 6 Problem 5.12 An evaporative cooling tower (see the figure below) is used to cool water from 110 to 80 °F . Water enters the tower at a rate of 250,000 lbm/hr. Dry air (no water vapor) flows into the tower at a rate of 151,000 lbm/hr. If the rate of wet airflow out of the tower is 156,900 Ibm/hr. determine the rate of water evaporation in lbm/hr and the rate of cooled water flow in lbm/hr. Wet...
4 AAA 4 An 11111111111 water from condenser - =6000 gal/hr Ten=95°F water to condenser + air Tamb= 74°F Pamb=0.5 Ve=10,000 cfm makeup water T = 80°F Figure 1: Cooling tower. The cooling tower is designed to cool water from the condenser of a large air conditioning system that enters with a flow rate V =6,000 gallons per hour with temperature Twin = 95°F. Outdoor air at Tamb = 74°F and Pamb = 50% relative humidity is forced through the...
Water entering a wet cooling tower at 35°C at a rate of 100 kg/s
is cooled to 22°C in the cooling tower by air that enters the tower
at 1 atm, 20°C, and 60% relative humidity and leaves saturated at
30°C. The makeup water of 22°C is supplied to the outlet to make
the mass flow rate of the cool water the same as that at the inlet,
see Figure Q5.
Q.5Water entering a wet cooling tower at 35°C at...
A combined gas-steam power plant uses a simple gas turbine for
the topping cycle and a simple Rankine cycle for the bottoming
cycle. Atmospheric air enters the compressor at 101 kPa and 20 °C,
and the maximum gas cycle temperature is 1100 °C. The
compressor pressure ratio is 8. The gas stream leaves the heat
exchanger at the saturation temperature of the steam flowing
through the heat exchanger. Steam enters the heat exchanger at a
pressure of 6 MPa and...
The figure below shows a condenser/cooling tower pipe system needed to remove heat from a water cooled refrigeration condenser and reject the heat to the atmosphere. The amount of heat to be rejected to the atmosphere is 480,000 Btu/hr. The water enters the condenser at 85"F, and the temperature rise of the water through the condenser is 10°F. The total length of the piping in the system is 60 ft. Fittings are as shown. Assume bends to be as shown...
Moist air at 24°C, 1 atm, and 35% relative humidity enters an evaporative cooling unit operating at steady state consisting of a heating section followed by a soaked pad evaporative cooler operating adiabatically. The air passing through the heating section is heated to 45°C. Next, the air passes through a soaked pad exiting with 50% relative humidity. Using data from the psychrometric chart, determine: (a) the humidity ratio of the entering moist air mixture, in kg(vapor) per kg(dry air). (b)...
Problem: Feasibility Study of Recovering Waste Heat from Primary Process Cooling Water to Provide Heat for a Secondary Process Primary Process Cooling Water 100 F Secondary Process Requirements: Heat Supply Rate of 330,000 BTU/hr at 150 F Recovery System Heat Pump R134a Compressor Isentropic Efficiency: 76% Design Values Evaporator Coil Design Pressure: 160 psi Condenser Coil Design Pressure: 300 psi Deliverables Design Coil Temperatures (Evaporator and Condenser) - Confirm that these will be consistent with temperatures at the heat source...
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