Q.2 An evaporative cooler is used to cool a space which has a sensible heat load of 15 kW and a latentheat load of 4.8 kW. The dry air mass flow rate of the supply air is 1.4 kg/s. The air leaves the coolerwith a db-temperature of 18°C and a relative humidity of 100%. The outdoor air db-temperature is35°C. The pressure is constant at 101.3 kPa. Determine(1) the db-temperature and relative humidity of the(ii) the outdoor relative humidity, and(iii) the mass flow rate of water.space,

Answered: Image /qna-images/answer/05100df7-4c30-4b2a-8faf-e20d316f2ccc.jpg

Answered: Q.2 An evaporative cooler is used to…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Q3/Air washer was used to cool air entering at 35°C dry bulb and 50% relative humidity. The air leaves the air washer at 20°C dry bulb temperature. (A)Determine the moisture added per kg of dry air.(B)What is the efficiency of the air washer.(C)calculate *. the heat removed by the washer
Atmospheric air at 1 atm, 32°C, and 95 percent relative humidity is cooled to 24°C and 60 percent relative humidity at a rate of 20 m³/min as shown in Figure Q2. A simple ideal vapor-compression refrigeration system using refrigerant-134a as the working fluid with 0.05kg/s mass flow rate, is used to provide the cooling required. It operates its evaporator at 4°C and its condenser at a saturation temperature of 39.4°C. The condenser rejects its heat to the atmospheric air. Calculate: a. the amount of water, in kg/kg dry air, removed from the air, b. the rate of heat removed from the air, in kJ/kg dry air, c. the rate of heat rejected at the condenser, d. sketch the process on the psychrometric chart provided. Expansion valve 24°C 60% Evaporator -www- Dry air mass balance: Water mass balance: Energy balance: Condenser in ₁ h= 0 Condensate Compressor m = m = m I alm Figure Q2 + Σinh m₂ + m₂ →Q 1 32°C 95% m₂ = m (, -a) = m(h, -h₂)-mh
Solve all please i give thumb up? Outside air at 15°C and 20% relative humidity is admitted at a volumetric rate of 15m³/min into an air conditioning system composed of a simple heating section followed by a humidification section, which must supply air at 27 °C and 65% relative humidity. The airflow temperature between the heating and humidifying sections is 22°C and the entire air conditioner operates at 70kPa. Determine, using calculations: (a) the rate of heat supply to the heating section, in kW, is ______. (b) the wet bulb temperature of the air after the heating section, in °C, is ______. (c) the mass flow rate of steam in the humidification section, in g/s, is ______. (d) the temperature of the steam injected into the humidification section for a steam pressure of 200kPa, in °C, is _______
An air handler supplies 2.36 m3 /sec at a temperature of 12°C. The air handler was designed for 0.5 m3 /sec of outside air at 32oC DB and 26°C WB. The remaining return air from the space is at 25°C DB and 55% relative humidity. What are the entering conditions of the air into the coil, in DB and WB? Air pressure is 101.325 kPa
P=19 Moist air goes into air-conditioning unit at a degree-30 C and 70% relative humidity, and it is cooled to 20-degree C and 20% relative humidity at a constant pressure of 1.01325 bar. The mass flow rate of dry air is mda=63 kg/s The unit applies refrigerant R-134a as the cooling fluid that enters inside the tubes of the cooling coil at 3.6 bar with a quality of 0.2 and leaves as a saturated vapor at the same pressure of 3.6 bar. Use the psychometric chart to determine: a) Mass flow rate of condensed water in kg/s b) The heat transfer rate from the air to the cooling coil in kW (Use the psychometric chart) c) The mass flow rate of R-134a that is needed in kg/s
Which is better for humidifying air, adding steam or water? Justify?
I need help. Please answer this ASAP. Thank you!
14-121 A laboratory has a volume of 700 m' and must have one complete air change per minute when being used. Outside atmospheric air at 100 kPa, 30°C dry bulb, and 60 percent rela- tive humidity is ducted into the laboratory air-conditioning equipment and conditioned to 20°C dry bulb and 12°C wet bulb, the required state for air supplied to the laboratory. (a) Sketch the system hardware and the psychrometric diagram for the process. (b) What outside atmospheric air mass flow rate is required for the air change, in kg/h? (c) Determine the mass flow rate of water condensed from the atmospheric air, in kg/min. (d) The cooling fluid in the air-conditioning system is chilled water, which has a 15°C temperature rise during the heat exchange process. Determine the chilled water mass flow rate, in kg/min.
Q1: Moist air at 40°CDBT, 20°CWBT, and standard atmospheric pressure is humidified adiabatically to 25 CDBT and 70% RH. Find the amount of moisture and heat added per Kg of air. (answer without using of psychrometric chart). Q2: A room is to be maintained at 22°C db and 50%RH has total heat loss of 7.5 kW of which 80% is sensible heat, when outdoor at 5 °C and 80% RH. If the design difference between supply and room air temperature is 10°C DBT and 50% fresh air, find the capacities of heating coil, and humidifier used a tap water at 10 "C. Q3: A room is maintained at 22°C and 50%RH has a wall consist of common brick finished internally with gypsum plaster and externally with 15mm cement plaster. The outside conditions are 2°C, 75% RH. Find the thickness of common brick required for preventing moisture condenses on the wall.
An auditorium to be air-conditioned for the following conditions, Outdoor dry-bulb temperature 40 °C Outdoor wet-bulb temperature 20°C Expected comfort condition 20 DBT 60%RH Seating capacity of the auditorium 1500 persons Air supplied from outdoor 0.3 m¥min per person fthe required condition is achieved first by adiabatic humidification and then by cooling, determine () the capacity of the cooling coil in tonnes and (i) the capacity of humidifier in kg/h.
Atmospheric air, which is a mixture of dry air and water vapour, is supplied into ducting with a cooling coil. Initially it has a relative humidity of 0.57, volumetric flow rate of 0.72 mis and temperature of 17°C. The atmospheric air is then passed over a cooling coil such that the temperature drops to 6°C. As this is below the dew point, the water vapour condensates after cooling coll and the air leaves in a saturated state. Assuming the barometric pressure of atmosphenic air to be 1.01325 bar, determine the folowing quantities in question parts () to (vi): (1) Partial pressure of water vapour in the air and water vapour mixture entering, Pul

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS