Given: Qref Tu = Te Refrigerant Requited: = I TOR 30°C - 200с 1 а " R 1349 сор
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- Q) A single-cylinder two-stroke SI engine has 8 cm diameter bore and 10 cm stroke. The compression ratio is 8. The cxhaust port opcns 60° beforc BDC and closcs 60° after BDC. The air/fucl ratio is 15.1. The temperature of the mixture cntering into the cngine is 300 K and the pressure in the cylinder at the time of closing the exhaust port is 1.05 bar. Take R for the mixture = 290 J/(kg K). Air supplied to the engine is 150 kg/h. The speed of the engine is 4000 rpm, Considering the effective stroke, calculate the scavenging ratio, the scavenging efficiency and the trapping efliciency.Refrigerant 22: T= 20°C v = 0.0008263 m/kg On the Triple Line Saturated Vapor Saturated Liquid O Critical Point Superheated Vapor Compressed LiquidE 01 Image Word 1/1 Using PV & TS Diagrams derive the formulae of a. Temperature, Pressure & Volume c. Change of Enthalpy e. Change of Entropy g. Work steady-flow of the following processes; 1. Isopiestic, 2. Isochoric, 3. Isothermal, 4. Adiabatic, 5.General Polytropic b. Heat addedrejected d. Change of Internal Energy f. Work non-flow Tap to view in full-screen OCR Rotate Markup Extract Text Signature Note
- 4. An air refrigeration system operating on Bell Coleman cycle, takes in air from cold room at 268 K and compresses it from 1.0 bar to 5.5 bar. The index of compression being 1.25. The compressed air is cooled to 300 K. The ambient temperature is 20°C. Air expands in an expander where the index of expansion is 1.35. Calculate : (i) C.O.P. of the system (ii) Quantity of air circulated per minute for production of 1500 kg of ice per day at 0°C from water at 20°C. (iii) Capacity of the plant in terms of kJ/s. Take c, = 4.18 kJ/kg K for water, e, = 1.005 kJ/kg K for air Latent heat of ice = 335 kJ/kg. [Ans. 1.974 ; 5.814 kg/min ; 7.27 kJ/s]Pls. Answer thank you! The evaporative condenser of an ammonia refrigeration plant has a water flow rate of 100 kg/s and enters a natural draft cooling tower at 43 °C. The water is cooled to 30 °C by air entering at 27 oC db 24 °C wet bulb. The air leaves the tower as 90% RH and 32 °C db. Calculate the percent of make-up water needed the tower. At 27 °C db and 24 °C wb: h = 72.5 KJ/kg, w = 0.0178 At 90% RH and 32 °C db: h = 102 KJ/kg, w = 0.0275mbustion. 4G* UE E I 62% 1:29 ... Question 2 2.1 A single stage double acting air compressor of 150KW power takes air in at 16 bar & delivers at 6 bar. The compression follows the law PV1.35 = C. the compressor runs at 160rpm with average piston speed of 150 m/min. Determine the size of the cylinder.
- 贪411 461l1 zain IQ Asiacell M Superheating process .8 should exists for protecting the сycle. none of these answers. should not exist in the cycle to keep it working efficiently. is necessary to keep the refrigerant at low temperature. The refrigerant leaving the .7 compressor follows an isentropic process. an isothermal process. an adiabatic process an isotropic process. All specific physical quantities are .5 measured relative to3 Condenser Expansion valve Compressor Evaporator Tin ļ Tout Fig.2: Heat pump system described in part (a) [2] 1. Construct a P-h and T-S plots showing a. All the processes b. The refrigeration effect (RE), heat of compression (HOC), and heat of rejection (HOR).Q2// The air supplied to a gas turbine plant is 10 kg/s. The pressure ratio is 6 and pressure at the inlet to the compressor is l'bar. The compressor is two stages and provided with perfect intercooler. The inlet temperature is 306 K and the maximum temperature is limited to'1073 K. the isentropic efficiency of compressor each stage is 80%. The isentropic efficiehcy of turbine is 85%. A regenerator is included in plant whose effectiveness is 0.7. Neglect the mass of fuel. Determine the thermal efficiency of the plant. Inter cooler 2' twww 3-0 supply L.P. Н.Р. Alternator Air in Biz & Bu Regenerator Exhaust
- A single-acting two-stage compressor with com- plete intercooling delivers air at 16 bar. Assuming an intake state of 1 bar at 15°C, the pressure ratio per stage is20 stages of MSF-M with the following main parameters: intake: 1500 kg/s, 35,000 ppm, 20 C; blow down brine: 38 C, 69,000 ppm recycle brine about 79% of blow down brine steam supplied to brine heater: 2kg/s, 115 C The top brine temperature : 100 C performance ratio: 8.5 calculate all the characteristics of the system for first stage (x, tin, tout, Tin, Tout, Mdi, Mbi, TVi, Ai, Ab and the width and the lengthThe air outside is 40 C and 60% r.h. I want torun an air conditioner to cool it to 15 C. The deliver rate should be 1000 m^3/min. What is Q and the rate at which water condenses (if any)?