The outside air at 31 C dry bulb temperature and 18.5 C wet bulb temperature enters a cooling coil at the rate of 40 m3/min. The effective surface temperature of the cooling coil is 4.5 C and its cooling capacity is 12.5 kW of the refrigeration find. a) Dry bulb temperature % wet bulb temperature of the air leaving the coil. b) Enthalpy of air leaving the coil. c) By-pass factor of the coil.

The outside air at 31 C dry bulb temperature and 18.5 C wet bulb temperature enters a cooling coil at the rate of 40 m3/min. The effective surface temperature of the cooling coil is 4.5 C and its cooling capacity is 12.5 kW of the refrigeration find. a) Dry bulb temperature % wet bulb temperature of the air leaving the coil. b) Enthalpy of air leaving the coil. c) By-pass factor of the coil.

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

Chapter24: Expansion Devices

Section: Chapter Questions

Problem 8RQ: The TXV responds to an increased heat load by A. decreasing refrigerant flow. B. keeping refrigerant...

See similar textbooks

Similar questions

The TXV responds to an increased heat load by A. decreasing refrigerant flow. B. keeping refrigerant flow constant. C. increasing refrigerant flow. D. not reacting to changing heat loads.
Problem An electric heater is to heat 18 kg of oil per min. from 24.5 °C to 185.5 °C. Specific heat of oil is 2.018 KJ/kg- °C.Calculate the power consumed by the heater. Ans. Problem The overall efficiency of an electric system, coal pile to lights a lamp is What fraction of a kg of coal containing 1350 W lamp for 45 minutes? 97.4694 Kw 18 %. 10250 KJ/kg must be consumed to light a Ans. 1.976 KJ
The air-handling unit of an air conditioning plant a total of 300 m3/min of dry air which comprises by volume 20% fresh air at DBT=40'C, WBT= 29°C and 80% return air at DBT-25 C, RH-50%. The air conditioned space has a sensible and latent heat load of 58 kW and 14.5 kW respectively. Calculate: a) Air supply temperature (Ts). b) Apparatus dew point temperature (ADP). c) BPF. d) The cooling coil load in TR. e) Plot the processes psychometrically.
12- Water vapor at 20000kg /hour flows into a steam boiler with a specific volume of 225 kPa 0.7565 m ^ 3 / kg. Calculate the time required to increase 1 ton of water to 200 ° C in the boiler if the insulation of the boiler is bad and loses heat to the environment of 100 kW with the energy it takes from the fuel in the combustion chamber. A.) 2061sB.) 1117sC.) 7643 sD.) 965 sE.) 8973 s
A six 67 x 57 mm refrigerant 22 compressor operating at 30 rps indicate a refrigerating capacity of 96 kW and a power requirements of 19 kW at an evaporating temp of 50C and a condensing temp of 350 C. compute: a) clearance volumetric eff c= 5% v2=20 L/kg, h2=428 kJ/kg b) actual volumetric eff c) compression eff
a.) What are the different types of fans used in air-conditioning systems? Discuss their applications and relative advantages and disadvantages. b.) Air from an air-conditioned room is exhausted into atmosphere through a grill. The quantity of air passes through the grill is 20 cubic meter minute. The duct area leading to the grill is 0.12 m2. The static pressure behind the grill is 3 mm of water. Find the effective area of grill exhausting the air into atmosphere. Take the pressure loss passing through the grill as 0.5 mm of water. Solve both a and b Asap please , I will rate
In an R-22 based refrigeration system, a liquid-to-suction heat exchanger (LSHX) with an effectiveness of 0.65 is used. The evaporating and condensing temperatures are 7.2°C and 54.4°C respectively. Assuming the compression process to be isentropic, find:a) Specific refrigeration effectb) Volumetric refrigeration effectc) Specific work of compressiond) COP of the systeme) Temperature of vapor at the exit of the compressorComment on the use of LSHX by comparing the performance of the system with a SSS cycle operating between the same evaporator and condensing temperatures.
Condenser 30 c „Flash Chamber Pi Evaporator OC & 50 kW For a 2-stage ammonia compression system, determine: 1. Draw the PH diagram showing the condenser, evaporator, & compressor discharge temps, intercooler pressure, all enthalpies & compressor suction specific volumes, m/kg 2. Compute the intercooler pressure in Bars & equivalent Ti in °C 3. Compressor discharge temps T: & T4 4. Mass of refrigerants m:, ms & m: in kg/sec 5. Compressor power Wi, W & total W- in kW & HP 6. Compressors PD with equal volumetric efficiency 80%; m/s 7. Condenser capacity, kW 8. Using a single stage compression, calculate & compare the power of the compressor/s in kW & HP
If the temperature difference across each radiator is 10 C, the mass flow rate of water in pipe LM is 2.2 kW 1.7 kW M. 1.7 kW |2.2W D] Domestic Hot Water H 1.7 kW L.7EW Boiler Pump 1.4EW Select one. O a 0 186 kg/s Ob0 133 kg/s OC0 167 kg/s od 0 301 kg/s
A steam condenser receives 10 kg per second of steam with an enthalpy of 2570 KJ/kg. Steam condenses into liquid and leaves with an enthalpy of 160 KJ/kg, if cooling water passes through the condenser with temperature increases from 13oC to 24oC. Calculate the cooling water flow rate in kg/sec. Show conversion of units pls
Pls. Answer thank you! A cooling tower has an efficiency of 65%. Water enters the tower at 55°C. The wet bulb temperature of surrounding air is 27°C. What is the temperature of water leaving the tower?
3:57 A Done lecture 7_b5ee35c08478147bb8a3744a... Lec. (7) tar -Dry bulb temperature O Example (1): An air conditioning equipment (figure) have the following: - Supply air mass-1.26 kg/s. The cooling coil receives 20 % outdoor air and 80% return air. tdz Fig. 18.14. Representation of supply air condition and room design condition. 0.252 kg/s Refrigeration and A/C - Outdoor air conditions are: 28°C db, 19.5°C wb Return air conditions are: 22°C db, 50% RH. The mixture air condition outlet the cooling coil are: 10°C db, 0.00735 kg/kgda Draw the system on the Psychrometric chart, then calculate: 1. Cooling coil load. 2. Room sensible heat. 3. Room latent heat. 4. Fresh (outdoor) load. 5. Duct and fan heat gain 6. Sensible heat ratio SHR. If the supply air temperature increases with a value 1°K due to fan motor heat gain and 2°K due to duct heat gain. . ← 1.008 kg/s R to Dr. Omar M. Ali LTE الغرفة المراد تكييفها (22,50 %) 1.26 kg/s R Grand Sensible Heat Factor It is defined as the ratio of…