ntained at 25°C DBT with 55% RH. The RSHL=150 kW and RLHL = 122 kW. The discharge fro
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In an air conditioning plant equipment exists for reheating the air before supply to a
room to be maintained at 25°C DBT with 55% RH. The RSHL=150 kW and RLHL
= 122 kW. The discharge from the coil is 12°C DBT and 95% RH. Calculate
(1) The supply air state and rate.
(II) Reheating if any.
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Solved in 2 steps with 2 images
- PLease answer with clean solution. Thanks A refrigeration system using refrigerant 12 is to have a refrigerating capacity of 80 kW. The cycle is a standard vapor-compression cycle in which the evaporating temperature is -15°C and the condensing temperature 30°C. Determine the volume flow of refrigerant measured in liters per second at the inlet to the compressor.REFRIGERATION In a freon-22 refrigeration system, the capacity is 20 tons at a temperature of -20°C. The vapor from the evaporator is pumped by one compressor to the condensing pressure of 40C. Later, the system was revised to a two-stage compression operating on the cycle with intercooling but no removal of flash . Answer the ff: a. Calculate the power required by the single compressor in the original system. b. Calculate the total power required by the two compressors in the revised system.Idea Vapor refrigeration Cycle uses R134 and operates between 70KPa and 900KPa. If the peak temperature coming out of the compressor is 40 degrees Celsius. What is the COP for this Cycle.
- Please answer with complete solution. Thanks A refrigeration system using refrigerant 12 is to have a refrigerating capacity of 80 kW. The cycle is a standard vapor-compression cycle in which the evaporating temperature is -15°C and the condensing temperature 30°C. Determine the discharge compressor pressure in kPaa.an T, =70 P=12MPa Adisbatic Wi = 015KW Compreser T (sat. vapory, =0 1eMe Razia An adigbatic compressor works with R-134a as working fluid and 0.15 KW. The refrigerant enters compressor as saturated vapor at 0.14MPa. The refrigerant leaves compressor at 70°C and 1.2MPa and then enters condenser 1o be cooled at which pressure remains constant and Jeaves condenser at 40°C If the surrounding temperature is 30°C Find: (a) mitial temperature (1), (b) mass flow rate of R-134a, (¢) volumetric rate of R-134a at entrance of compressor (1), (@) Tas » (€) compressor efficiency, (1) rate of heat losses from condenser. and () total entropy generation in condenser and also show if the process is possible or not.In refrigeration system uses R717, the evaporator temperature is -20C and the condenser temperature is 50C. The cycle is ideal. Determine the refrigeration effect (RE) and Coefficient of Performance (COP). If the subcooling of the refrigerant is 5K, determine the refrigeration effect (RE) and Coefficient of Performance (COP).
- In a Refrigerant 11 system ,one evaporator is to provide 210 kw of refrigerant at 0 0C and another evaporator is to provide 224 kw at -200C . The system uses two stage compression with intercooling and removal of flash gas. The condenser temp is 400C . Given that, h2=389kJ/kg, h4=416kJ/kg Compute the following: a.) mass flow rate at low stage compressor (m1)ANSWER: 1.25377 kg/s b.) mass flow rate at high stage compressor (m3)ANSWER: 2.90255 kg/s c.) low stage compressor workANSWER: 12.96406 kw d.) high stage compressor workANSWER: 78.68819 kw e.) total compressor workANSWER: 91.65226 kw f.) COPANSWER: 4.73528 g.) heat rejected in the condenserANSWER: 525.65226 kwQ/ Refrigeration system operates on a vapor - compression cycle with R-134a as the working fluid. The refrigerant enter the compressor as superheated vapor at 0.1 Mpa and is compressed to 1 Mpa .The superheat and subcooling are 10 C°. Mass flow rate of refrigerant is 0.05 kg/s. Determine :- x4, Qe, Qc, Wc & C.O.P.Example 2: Refrigerant R-134a enter the compressor of a has a refrigerantor a superheared vapor at 0.14MPa and -10°C at arate of 0.05kg/sec and leave at 0.8Mp and 50°C.The refrigerant cooled in the condenser to 26°C and 0.72Mpa is throttled to 0.15MPa.Disregradingany heat transfere and pressure drop in the connecting line between the components. Determine: a) The rate of heat removed from the refrigerated space b) The power input to the compressor. c) Isentropic eff of the compressor d) COP of the refrigerantor.
- In a refrigerant 11 system, one evaporator is to provide 256 kw of refrigerant at 0°C and another evaporator is to provide 228 kw at -20°C. The system uses two stage compression with intercooling and removal of flash gas. The condenser temp is 40°C. h2 = 393 kJ/kg, h4 = 412 kJ/kg Compute the ff:a. mass flow rate at low stage compressor (m1), answer must be in kg/sb. mass flow rate at high stage compressor (m3), answer must be in kg/sc. low stage compressor work, answer must be in kwA refrigerating system operates on reversed carnot cycle. The minimum and maximumtemperatures are minus 28°C and plus 70°C, respectively. If the heat rejected at the condenseris 5200 kJ/min, draw the TS diagram and find,a) Power input requiredA steam boller plant consists of an economiser, evaporator and a superheate r and steam Is generated at a rate of 9600 kg/hr at a pressure of 1,8 MPa and 260°C. The feed water enters the eco- nomiser at 36,2°C and the boiler at 86 C. The steam leaves the evaporator 0,89 dry. Ihe plant uses 13,5 kg coal/minute vith a calorific value of 36 MJ/kg. Calculata the heat transfer In the economiser, evaporator and the suporhe ater per kgl. Also calcu- late the plant elficiency and the equivalent evaporation from and at 100°C.