A chemical laboratory at UJ requires an air conditioning system that maintains the room at 22 °C dry bulbtemperature and 50% relative humidity. The system is mixing 25% of fresh air by mass with 75%recirculated air. The fresh air enters at 35°C dry bulb temperature and 28 °C wet bulb temperature and isadded to the system at a rate of 50 m3/min. For a by-pass factor of the cooling coil of 0.18 and ADP of 8.5°C, determine the mass of air after the mixing, the condition of air after mixing and after cooling, and thecapacity of cooling coil (in kW). Assume the atmospheric air at 101.32 kPaNote: plot points and read properties from psychometric chart. Label the points and draw the processlines on the chart,

The temperature of air measured by a thermometer freely exposed to the air but insulated from…

Answered: A chemical laboratory at UJ requires an…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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السؤال الأول A refrigerant of a certain thermodynamic cycle at a point during the evaporation process where its fraction dryness is 50%, and latent heat of 211.3 kJ/kg. Determine the enthalpy of this refrigerant at this point knowing that its saturated Jiquid enthalpy is 190.7 kJ/kg 307. 67KJ/kg O 267.65 kJ/kg None of the above 296.35 kJ/kg 1:27 PM 91"E Sunny A DE . 5/14/2022
Problem 5-83 An air-conditioning system involves the mixing of cold air and warm outdoor air before the mixture is routed to the conditioned room in steady operation. Cold air enters the mixing chamber at 7°C and 105 kPa at a rate of 0.55 m3/s while warm air enters at 34°C and 105 kPa. The air leaves the room at 24°C. The ratio of the mass flow rates of the hot to cold airstreams is 1.6. Using variable specific heats, determine (a) the mixture temperature at the inlet of the room and (b) the rate of heat gain of the room. Cold air 7°C Room - 24°C Warm air 34 C 59°F Cloudy
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Pat Pb ifde A Air enters a window air conditioner at 1 átm. 30 cand 80 % RH at a rate of 10 m³/min and it leaves as saturated air at 14 c°. Part of the moisture in the air that condenses during the process is also removed at 14 c°. Plot the schematic and psychometric of the process and determine the rates of heat and moisture removal from the air. B- ایسا آستا
An air-standard set of processes with constant specific heats is executed in a closed system and is composed of the following:1-2 Isentropic compression from 100 kPa and 25°C to 600 kPa2-3 Isometric heat addition to 1500 K3-4 Isentropic expansion to 100 kPa4-1 Isobaric heat rejection to initial state Question: Following the given data, perform the following:a. Plot the P-V and T-S Diagram of the cycleb. Calculate the net work output of the cycle (kJ/kg)c. Calculate the Thermal Efficiency (%)
Please answer and will surely give an upvote. Thank you. 8. 1.5 m3/s of moist air at a state of 28℃ DB, 21℃ WB, and 101.325 kPa flows across a cooler coil and leaves at 12.5℃ DB and 0.0083 kg/kg d.a. Determine the following: a. The apparatus dew-point temperature in ℃ using the Psychrometric chart. b. The By-Pass factor in percentile (%) c. The cooling load of the process in kilowatts (kW)
A stream of outdoor air is mixed with a stream of return air in an air-conditioning system that is operated at 101.325 kPa barometric pressure. The flow rate of outdoor air is 2.0 kg/s and its condition is 35°C DBT and 25°C WBT temperatures. The flow rate of return air is 3.0 kg/s and its condition is 24°C DBT and 50% RH. If the ambient pressure is 98 kPaa, determine the following: 1. Enthalpy of the mixture in kJ/kg 2. Humidity ratio 3. Dry bulb temperature of the mixture in °C
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 %.
In an air conditioning system 30 emm of fresh out door air is introduced at 43°C DBT and 30% RH. The remaining air is recirculated from the room maintained at 25°C DBT and 50% RH. The bypass factor of cooling coil is 0.15 and apparatus dew point Is 11.8°C, RSH 100 kW and RLH 15 kW. Determine: (1) Humidity ratios for outdoor and Room conditions. (2) OASH & OALH (3) ERSH and ERLH (iv) Supply air temperature (v) Supply air volume flow rate using ERSH (vi) Temperature at inlet to cooling coil by assuming density of niside and outside air sanie Given that saturation pressures of water at 25°C and 43C are 3.1693 KP and 8.6459 KPa respectively. Show the process on psychrometric chart standard atmospheric pressure=1.01325 bar.
A bedroom is to be conditioned that the total heat load is 20 kW and the sensible heat ratio is 0.4. The room is to be maintained at 22°C DB and 55% relative humidity. The outside air condition is at 32°C DB and 23°C WB. The conditioned air from the reheater enters the room at 17°C. Determine the following: a. The percentage of recirculated air if the mass flow rate of water vapor in the mixture is 1 kg/min b. The refrigeration load TR c. The heat required in the reheater kW
Calculate the internal energy change (BTU / s) and enthalpy change (BTU / s) for 4lb / s of air that increases its temperature from 40 to 340 ° F isentropically.
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