ASHRAE PSYCHROMETRIC CHART NO.1 ASHRAE NORMAL TEMPERATURE BAROMETRIC PRESSURE COPYRIGHT 1992 SEA LEVEL 101.325 kPa AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS, INC. SENSIBLE HEAT TOTAL HEAT 80, 20 30 ENTHALPY HUMIDITY RATIO 40, 10 50 ENTHALPY h, kag 20. SATURATION TEMPERATURE C 90 25 100 30 DRY-BULB TEMPERATURE, "C 10% RELATIVE HUMIDITY HUMIDITY RATIO w. 9 120 22 110 20 100 60 -0.70 -0.75 -0.00 -0.8 -0.00

ASHRAE PSYCHROMETRIC CHART NO.1 ASHRAE NORMAL TEMPERATURE BAROMETRIC PRESSURE COPYRIGHT 1992 SEA LEVEL 101.325 kPa AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS, INC. SENSIBLE HEAT TOTAL HEAT 80, 20 30 ENTHALPY HUMIDITY RATIO 40, 10 50 ENTHALPY h, kag 20. SATURATION TEMPERATURE C 90 25 100 30 DRY-BULB TEMPERATURE, "C 10% RELATIVE HUMIDITY HUMIDITY RATIO w. 9 120 22 110 20 100 60 -0.70 -0.75 -0.00 -0.8 -0.00

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

Chapter35: Comfort And Psychrometrics

Section: Chapter Questions

Problem 3RQ: Lower room temperatures can be offset in winter by A. lowering the relative humidity. B. being very...

See similar textbooks

Similar questions

In an air-conditioning unit 3.5 m3/s of air at 32 C dry-bulb temperature, 50 percentrelative humidity, and standard atmospheric pressure enters the unit. The leavingcondition of the air is 18 C dry-bulb temperature and 90 percent relative humdity.Using properties from the psychrometric chart, (a) calculate the refrigeratingcapacity in kilowatts and (b) determine the rate of water removal from the air
f. A single-family detached residence of moderate construction has a total sensible load of 53,300 Btu/hr. The design humidity ratio is 0.021 lb of vapor/lb of dry air. Determine the total cooling load.
PLEASE SOLVE ANY TWO QUESTIONS. a) Air at 80°F DB and 50% RH is cooled and dehumidified to 50°F and 100% RH. What is the rate of latent heat removed from 1,000 CFM of air? b) If 500 CFM of outside air at 96°F DB and 76°F WB is mixed with 1,500 CFM of return air at 80°F DB and 50% RH, what is the specific humidity of the mixed air stream? c) A room has a sensible cooling load of 32,000 Btu/hr. The room latent load is 12,000 Btu/hr. What sensible heat factor results from these loads? d) Air at 40°F DB enters a furnace with a heating capacity of 50,000 Btu/hr. If the temperature of the air is increased to 90°F, what is the air flow rate supplied to the furnace? e) Find the enthalpy of air whose dry bulb temperature is 76°F with a humidity ratio of 60 grains/lb f) Air at 30°F DB and 80% RH is heated to 75°F DB by passing it over a heating coil (i.e. sensible heating only) What is the wet-bulb temperature of the heated air?
( Handwritten Sol) The air in a house is at 19°C, 59% relative humidity, and total pressure 89kPa. If air is cooled at constant pressure, the temperature at which moisture begins to codense is:
6-Prove that the enthalpy of the humid air remains constant along a wet bulb temperature line on the psychrometric chart
Air enters an air conditioning system at 78 kPa, 28°C, and relative humidity 31% at a rate of 4.2 m3/min, where it is cooled until moisture in the air begins to condense. Calculate the calorie elimination rate.
Water at a flow rate of 40 kg/s should be cooled from 40°C to 30°C in a humid cooling tower. Atmospheric air used in the cooling tower enters the cooling tower at 1 atmosphere pressure, 22°C dry bulb, 16°C wet bulb temperatures and 32°C temperature, 95% relative humidity. Calculate (a) the volumetric flow rate of the air at the entrance to the tower, (b) the mass flow rate of the conservation behaviors required for cooling, using the psychometric diagram.
Is it possible that during sensible heating process the condition of air reaches a relative humidity of 0% ?
The results of air temperature measurement obtained a dry bulb temperature of 48˚C and a wet bulb temperature of 31 ˚C. using a psychrometric chart, determine the properties of the air as follows:a. Air humidity = %b. Water content = kg water / kg airc. Specific volume = m3 / kgd. Enthalpy = kJ / kge. The condensation temperature = ˚C If the air is in 162 m3 space, determine,f. Air weight (dry air and water vapor) = kgg. The amount of water content in the space = kg
Air at 0° C and 95% relative humidity has to be heated and humidified to 25° C and 40% relative humidity by the following three processes: (a) preheating; (b) adiabatic saturation in a recirculated water air-washer; and (c) reheating to final state. Calculate: 1. The heating required in two heaters; 2. The makeup water required in washer and temperature of washer. Assume effectiveness of washer as 80 per cent
In an air-conditioning unit 3.5 m3/s of air at 27 °C dry-bulb temperature, 50 percent relative humidity, and standard atmospheric pressure enters the unit. The leaving condition of the air is 13 °C dry-bulb temperature and 90 percent relative humidity. calculate the enthalpy(H1 and H2).
Air enters a heating section at 95kPa, 10°C and 30% relative humidity. The air flow rate is 6 m¾/min. The air leaves the heating section at 25°C. Since the psychrometric chart is invalid for problems that are not at atmospheric pressure, perform long-hand calculations and determine the following: (i) the heat addition rate, and (i) the relative humidity of the exiting air.