I need the answer for number 3 and 4 only, thanks 3. How much temperature difference can be obtained for 650 kg of water if32.5 kg from this water is vaporized at 0.085 bar? Why?4. Atmospheric air at 35°C and 30% relative humidity enters a directevaporative cooler of water temperature 10°C. What will happen to air?Sketch the process on the psychometric chart.5. How can steam jet refrigeration system responds to variable load variation?Explain briefly.--End of Group 3----

“Since you have asked multiple question, we will solve the first question for you. If you want any…

Answered: 3. How much temperature difference can…

3. How much temperature difference can be obtained for 650 kg of water if 32.5 kg from this water is vaporized at 0.085 bar? Why?

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

Chapter28: Special Refrigeration Applications

Section: Chapter Questions

Problem 2RQ

See similar textbooks

Similar questions

Water exiting the condenser of a power plant at 408C enters a cooling tower with a mass flow rate of 5 7.5 3 105 kg/min. A stream of cooled water is returned to the condenser from a cooling tower with a temperature of 328C and the same flow rate. Makeup water is added in a separate stream at 218C. Atmospheric air enters the cooling tower at 1 bar, 268C and 40% relative humidity. Moist air exits the tower at 368C and 90% relative humidity. Determine the mass flow rates of the dry air and the makeup water, in kg/min. The cooling tower operates at steady state. Heat transfer with the surroundings and the fan power can each be neglected, as can changes in kinetic and potential energy. The pressure remains constant throughout at 1 bar.
a. Determine the specific volume, specific enthalpy, and specific internal energy of wet steam at 21 bar, dryness fraction 0.8.
This question requires the use of the extracts from the tables of thermodynamic properties supplied. Dry saturated steam at a temperature of 50°C is cooled isentropically such that its temperature falls to 40°C. What is the dryness fraction after the cooling process? a. 0.95 O b. 0.76 OC. 0.91 O d. 0.98 e. 0.87
Pls. Answer thank you!Atmospheric air from the inside of an automobile enters the evaporator section of the air conditioner at 1 atm, 27 C and 50 percent relative humidity. The air returns to the automobile at 10 C and 90 percent relative humidity. The passenger compartment has a volume of 2 m3 and 5 air changes per minute are required to maintain the inside of the automobile at the desired comfort level. Sketch the psychrometric diagram for the atmospheric air flowing through the air conditioning process. Determine the dew point and wet bulb temperatures at the inlet to the evaporator section, in 8 C. the required heat transfer rate from the atmospheric air to the evaporator fluid, in kW. the rate of condensation of water vapor in the evaporator section, in kg/min.
- Experiment- Air conditioning (Study of Air Conditioning Unit: Evaluation of heating and steam injection performance) Q- Why does the process of steam injection used in applications which need to maintain air with high humidity?
Air enters a humidifier at 34.25°C and 30% RH. If the air leaves the humidifier at 70% RH. Determine: The exit dry-bulb temperature of the air in °C.The saturation effectiveness in %.
(a) Air conditioning systems are most common device that used to achieve indoor environment comfort. The psychometric processes are important for designing air conditioning plants. Sketch the psychometric chart and illustrates all the processes that used to control the properties of air.
Evaporative cooling PLEASE DO NOT USE PSYCHROMETRIC CHART. THANK YOU In the diagram below inlet air is drawn over a pool of liquid water in a steady-state, steady-flow isobaric process. Evaporation on the pool resultsin saturated air at the exit. The pool of liquid water is assumed to be at the same temperature as the exitair. Discharge fans at the exit provide a volumetric flow rate of 800,000 ft3/min. In the diagram above inlet air is drawn over a pool of liquid water in a steady-state, steady-flow isobaric process. Evaporation on the pool resultsin saturated air at the exit. The pool of liquid water is assumed to be at the same temperature as the exitair. Discharge fans at the exit provide a volumetric flow rate of 800,000 ft^3/min. Problem #1: Assume that the exit temperature is T2 = 90 °F. For this model of the system and from thedata provided determine:a) The mass flow rate dry air through the system (lbm/sec).b) The rate of heat that is output from the R-134a condenser Qout…
When 100 kJ / kg of heat is lost at constant pressure from steam at 10bar and 0.8 dryness, the final dryness fraction will be At P = 10bar, h, = 762kJ / kg, h, = 2778kJ / kg
This question requires the use of the extracts from the tables of thermodynamic properties supplied. Dry saturated steam at a temperature of 25°C is cooled isentropically such that its temperature falls to 15°C. What is the dryness fraction after the cooling process? а. 0.97 O b. 0.77 O c. 0.81 O d. 0.85 е. 0.93
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.
1. 1.5 kg of air is compressed at a pressure of 7 barg(gauge pressure). The isentropic index is 1.2 and the air intake is at 1 bar, 20 degrees Celcius & Relative Humidity =65%. Determine:(i) the amount of work required to compressed the air.(ii) the temperature at the end of the compression(iii) the real work for an isentropic efficiency of 65%, and the shaft work if the mechanical efficiency is 75%.