Mass Flow Rate Problem
flow rate of 4.5 x 107 kg/h. A stream of cooled water is returned to the condenser from a
cooling tower with a temperature of 30ºC and the same flow rate. Makeup water is added
in 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 rates of the makeup water and dry air in kg/h. The cooling
tower operates at steady state. Heat transfer with the surroundings can be neglected, as
can changes in kinetic and potential energy. The pressure remains constant at 1.0 atm
throughout.
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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...
4. Liquid water at 100°F and 200 gal/min volumetric flow rate enters a cooling tower operating...
4. Liquid water at 100°F and 200 gal/min volumetric flow rate enters a cooling tower operating at steady state. Atmospheric air enters with a dry-bulb temperature of 80°F and a wet-bulb temperature of 60°F. Moist air exits the cooling tower at 90° and 90% relative humidity. Makeup water is provided at 80°F. Calculate the mass flow rates of the dry air and makeup water, each in lb/min, versus return water temperature at 80, 90, and 100°F. Ignore kinetic and potential...
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...
12.54 Air at 12°C, 1 atm, and 40% relative humidity enters a heat exchanger with a...
12.54 Air at 12°C, 1 atm, and 40% relative humidity enters a heat exchanger with a volumetric flow rate of 1 m'/s. A separate stream of dry air enters at 280°C, 1 atm with a mass flow rate of 0.875 kg/s and exits at 220°C. Neglecting heat transfer between the heat exchanger and its surroundings, pressure drops of ach stream, and kinetic and potential energy effects, determine (a) the temperature of the exiting moist air, in °C
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...
Please answer the relative humidity A humidifier takes in moist air at 29 °C, 1 bar,...
Please answer the relative humidity
A humidifier takes in moist air at 29 °C, 1 bar, and 50% relative humidity with a volumetric flow rate of 13 m3/s. To increase the moisture of the air, liquid water at 40 °C is sprayed into the moist air witha flow rate of 22 kg/s. Some of the liquid water evaporates into the moist air stream and the rest drain:s out of the humidifier with a temperature of 26 °C and a mass...
Air at 95°F, 1 atm, and 10% relative humidity enters an evaporative cooler operating at steady...
Air at 95°F, 1 atm, and 10% relative humidity enters an evaporative cooler operating at steady state. The volumetric flow rate of the incoming air is 895 ft3/min. Liquid water at 68°F enters the cooler and fully evaporates. Moist air exits the cooler at 70°F, 1 atm. There is no significant heat transfer between the device and its surroundings and kinetic and potential energy effects can be neglected. a)Determine the mass flow rate of the dry air in lb(dry air)/min....
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...
If the cooling water (cp = 4180 J/kg·ºC) from the above problem is to be provided...
If the cooling water (cp = 4180
J/kg·ºC) from the above problem is to be provided evenly by 10
cooling towers. Humid air enters each tower at 1 atm, 15 ºC and 20%
relative humidity, and leaves at 20 ºC and 0.014 kg of water/kg of
dry air. Determine the required volume flow rate of air through
each cooling tower.
Air exit 20 °C, 0 = 0.014 kg of water/kg of air Warm water 40 °C Air inlet 1 atm...
Air at 95°F, 1 atm, and 10% relative humidity enters an evaporative cooler operating at steady...
Air at 95°F, 1 atm, and 10% relative humidity enters an evaporative cooler operating at steady state. The volumetric flow rate of the incoming air is 1765 ft3/min. Liquid water at 68°F enters the cooler and fully evaporates. Moist air exits the cooler at 70°F, 1 atm. There is no significant heat transfer between the device and its surroundings and kinetic and potential energy effects can be neglected. A. Determine the mass flow rate of the dry air in lbm(dry...
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...
4. Liquid water at 100°F and 200 gal/min volumetric flow rate enters a cooling tower operating at steady state. Atmospheric air enters with a dry-bulb temperature of 80°F and a wet-bulb temperature of 60°F. Moist air exits the cooling tower at 90° and 90% relative humidity. Makeup water is provided at 80°F. Calculate the mass flow rates of the dry air and makeup water, each in lb/min, versus return water temperature at 80, 90, and 100°F. Ignore kinetic and potential...
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...
12.54 Air at 12°C, 1 atm, and 40% relative humidity enters a heat exchanger with a volumetric flow rate of 1 m'/s. A separate stream of dry air enters at 280°C, 1 atm with a mass flow rate of 0.875 kg/s and exits at 220°C. Neglecting heat transfer between the heat exchanger and its surroundings, pressure drops of ach stream, and kinetic and potential energy effects, determine (a) the temperature of the exiting moist air, in °C
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...
Please answer the relative humidity
A humidifier takes in moist air at 29 °C, 1 bar, and 50% relative humidity with a volumetric flow rate of 13 m3/s. To increase the moisture of the air, liquid water at 40 °C is sprayed into the moist air witha flow rate of 22 kg/s. Some of the liquid water evaporates into the moist air stream and the rest drain:s out of the humidifier with a temperature of 26 °C and a mass...
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...
If the cooling water (cp = 4180
J/kg·ºC) from the above problem is to be provided evenly by 10
cooling towers. Humid air enters each tower at 1 atm, 15 ºC and 20%
relative humidity, and leaves at 20 ºC and 0.014 kg of water/kg of
dry air. Determine the required volume flow rate of air through
each cooling tower.
Air exit 20 °C, 0 = 0.014 kg of water/kg of air Warm water 40 °C Air inlet 1 atm...
Air at 95°F, 1 atm, and 10% relative humidity enters an evaporative cooler operating at steady state. The volumetric flow rate of the incoming air is 1765 ft3/min. Liquid water at 68°F enters the cooler and fully evaporates. Moist air exits the cooler at 70°F, 1 atm. There is no significant heat transfer between the device and its surroundings and kinetic and potential energy effects can be neglected. A. Determine the mass flow rate of the dry air in lbm(dry...
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