5. Dry winter atmospheric air at latm, 8°C and 50% humidity enter an HVAC system at a rate of 10m'/hr, where it is isobarically conditioned to 21°C, 50% humidity. A water line supplies saturated water vapour. Determine heating or cooling rate required to accomplish this process. Also determine the rate wat which water must be supplied in the system in KW. Take heat of vaporization of water to be 2539.9kJ/kg. Note 1KJ/S = 1KW

5. Dry winter atmospheric air at latm, 8°C and 50% humidity enter an HVAC system at a rate of 10m'/hr, where it is isobarically conditioned to 21°C, 50% humidity. A water line supplies saturated water vapour. Determine heating or cooling rate required to accomplish this process. Also determine the rate wat which water must be supplied in the system in KW. Take heat of vaporization of water to be 2539.9kJ/kg. Note 1KJ/S = 1KW

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter40: Typical Operating Conditions

Section: Chapter Questions

Problem 1RQ: The standard design conditions for air-conditioning systems established by the Air-Conditioning,...

See similar textbooks

Similar questions

Pls. Answer thank you! Water at 55°C is cooled in a cooling tower which has an efficiency of 65%. The temperature of the surrounding air is 32°C dry bulb and 70% relative humidity. The heat dissipated from the condenser is 2,300,000 KJ/hr. Find the capacity in liters per second of the pump used in the cooling water
How high a relative humidity must a 35°C air have in order to obtain saturated airat 18°C by evaporative cooling? solve with complete diagram
H.W: - Steam at 7 bar & relative humidity 0.08 throttle to 0.05 bar, determine the steam condition after throttle.
A bank of 120-employees is maintained at 24°C db and 50% RH. The heat gain due to heat transfer through walls, roof, ..etc is 10 kW. The outside air temperature is 35°C and its relative humidity is 60%. Calculate the followings: (a) Volumetric flow rate of moisture removed. (b) Sensible heat ratio of the theater. (c) Relative humidity of the supply air.
A bank of 120-employees is maintained at 24°C db and 50% RH. The heat gain due to heat transfer through walls, roof, ..etc is 10 kW. The outside air temperature is 35°C and its relative humidity is 60%. Calculate the followings: (a) Ventilation air required. (b) Sensible and latent heat gains due to occupants. (CLF = 0.86) (c) Volumetric flow rate of supply air if the supply temperature is 18°C.
If the relative humidity at a sea-level site is 50% for a dry-bulb temperature of 80°F (26.5°C), calcu- late the moist-air enthalpy. () find the
l MTN 1/1 1:12 PM O 15% 0 Air at lol 325K Pa barometric pressure, dry beub temperature of 20°C and wet buib tem perature of 1S°C at 8tate one, mixxes adiubeti cally wth andther stream of air at lol.325 kpq buro metric pressure, dry bulb temperature f lC and rela tive humidity of so% at glate fewo. If the masses of dry air are 2kg and 3 kg rerrecfively, determine with the aid of a Psy chrometric Chart! D. he Dew point temperature of the air at stat e Point one - O. The relative humidity at Aeste porint one w. The Dew pomt temperature and the welt blelb tempercature at stute Point two U. The enthalpy of the tewe air gtreams V. The moisteure content of the two air streusme. 6. Explain cooling and humidificetion prece ss in air conditioning.
A rigid closed tank contains refrigerant 134a wnich is initally a two- phase liquid - vapor mxiure with a temperaflure of D'c and a quality of Ce0%. An electrical resistor nistalled inside the Fank transfers until the tank contains only saturated vapor. if the tank is well - insulated and the mass of the Cefrigerant is 1.5 kg, determıne the time it takes for the process to be completed in seconds using 5 signifigant Agures
4. A small auditorium is required to be maintained at 22 C dry bulb temperature and 70 % relative humidity. The ambient conditions are at 30 C dry bulb temperature and 75 % relative humidity. The amount of free air circulated is 200 m3/min. The required conditions are achieved by first cooling and dehumidifying through a cooling coil having apparatus dew point of 14 C and then by heating. With the help of psychrometric chart find. a) The capacity of the cooling coil intones of refrigeration and its by-pass factor. b) The amount of water vapour removed by the cooling coil in kg/h. c) The capacity of the heating coil in kW and its surface temperature. Assume by-pass factor as 0.2
How high a relative humidity must be for a 35°C air in order to obtain a saturated air at 18°C by sensible cooling? How much heat is involved? Assume barometric pressure to standard.
Consider a building that takes in air from outside (100% relative humidity, -10 °C), and heats it to 20 °C. What is the relative humidity inside the building assuming no other sources of water vapor?
QUESTION 1 Water at 60°C leaving a condenser at the rate of 22.5kg/s is sprayed into a natural-draught cooling tower and leaves it at 27°C. Air enters the tower at 1.013bar, 13°C and 50% relative humidity and leaves it at 38°C, saturated. Take Cp for the superheated vapour as 1.86 kJ/kgK. Calculate: 1.1. the air flow rate required in m/s; 1.2. the make-up water required in kg/s.