O FalgeQUESTION 2The refrigerant undergoes a change of phase during the heat-transfer process, the pressure of the retrigerant is the saturationpressure during the low supply and low rejection processes.TrueFalseQUESTION 3Frequently, the vapor of the liquid leaving the condenser is lower than the saturation temperature.O TrueFalseQUESTION &The pressure of the iquid leaveng the condenser we be less than the pressure of the vapor entarng, wd etemperndthe retigerant in the condenser.O TeQUESTION SAre many situations in which it is desirable to combine three cycles in series, either power systems or refigertion sytems, totake advantage of a very wide temperature range or to utilize what would otherwise be waste heat to improve etficiencyO trueO FalseQUESTION 6A cycle can't be made very efficient, since the temperature differences between the two fluid streams can be controlledthrough careful design of the combined system.True

Since we only solve upto three subparts at a time, we will solve the first three. Please specify the…

Answered: QUESTION 2 The refrigerant undergoes a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The food storage room requires a cooling system with a capacity of 10 tons of refrigeration that operates at an evaporator temperature of -17.8 ° C and a condenser temperature of 30.1 ° C. The refrigerant used is R-717 and the system operates in saturated conditions. Determine C.O.P , Refrigerant flow rate , Heat loss rate in condenses
Draw the Ts/Ph Diagram A 50-ton vapor compression refrigeration system is to evaporate R-12 at -20°C and to condense it at 40°C. The vertical compressor is to run at 10000 rpm; it is double acting, has the bore equal to the stroke, and has 10% clearance. Vapor enters the compressor at -10°C and liquid enters the expansion valve at 30°C. What refrigeration flow rate is required? What would be the bore and stroke of the compressor? What power is required by the compressor? What is the quantity of the cooling water required in the condenser for a 8-degree increase in temperature?
A. Describe the four processes, which occur in the vapor-compression-refrigeration cycle that youtested.B. How did you figure out the enthalpy at the various entry / exit stages? (I know you lookedat the chart or table provided! I understand that you may have used interpolation.) I want you toexplain briefly how you determined, what principle(s) you used to determine the enthalpy at thevarious points.Sketch a p-h diagram. On this sketch of the p-h diagram you must sketch and show SOME constanttemperature lines, constant pressure lines, constant enthalpy lines, constant entropy lines, quality factorand other significant features of the p-h diagram to show your understanding of the p-h diagram. Labelx & y axis, indicate the units, indicate the critical point. Label various regions,
An NH, vapor compression refrigeration system has a condensing temperature of 25•C and an evaporating temperature of -10°C. The refrigerating capacity is 7 tons. By Creating a schematic diagram and ph diagram determine the ff: a) refrigerant flow rate; b) volumetric flow rate at compressor suction; c) theoretical power required; d) heat rejected in the condenser; e) Refrigerating Effect and f) Coefficient of performance
Refrigerant 12 Condensing temperature = 46.2 oCEvaporating temperature = -3 oCTemperature of the suction vapor = -15.6oCRefrigerating Capacity for evaporator = 44 TONDetermine the COP
Select all the correct statements given below It is impossible to raise the temperature of cooling water above the condensation temperature in a condenser In an ideal Rankine Cycle, condensation takes place under isobaric and isothermal conditions In a surface condenser, condensation takes place at atmospheric pressure and temperature. A wet pump is used to remove excess cooling water in a surface condenser
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. At the entrance to the evaporator, what is the fraction of vapor in the mixture expressed on a mass basis? 0.97 0.29 0.92 0.27
Question 2 of 4 - / 25 An office building requires a heat transfer rate of 30 kW to maintain theinsidetemperature at 21°Cwhen theoutsidetemperature is O°C. Avapor-compression heat pump with Refrigerant 134a astheworkingfluid isto beused to provide the necessary heating. The compressoroperates adiabatically with an isentropic efficiency of 82%. Determine appropriate evaporator and condenser pressures of a cyclefor this purpose assuming ATcond = ATevap = 10°C, as shown in the T-sdiagram. The refrigerantexitstheevaporator assaturated vapor and exitsthecondenser as saturated liquid at the respective pressures. AT cond Outside air 21°C 0°C Inside air ATent Condenser Evaporator Expansion valve Compressor Step 1 Determinethe mass flow rate of refrigerant, in kg/s. m = kg/s Attempts: unlimited Submit Answer Save for Later Using multiple attempts will impact your score. 5% score reduction after attempt 2 Step 2 The partsof thisquestion must becompleted in order. This partwill be availablewhen…
The food storage room requires a cooling system with a capacity of 15 tons of refrigeration that operates at an evaporator temperature of -25.2 ° C and a condenser temperature of 37.5 ° C. The refrigerant used is R-717 and the system operates in saturated conditions. a. COP = b. Refrigerant flow rate = kg / s c. Heat loss rate in the condenser = kJ / s
The food storage room requires a cooling system with a capacity of 10 tons of refrigeration that operates at an evaporator temperature of -17.8 ° C and a condenser temperature of 30.1 ° C. The refrigerant used is R-717 and the system operates in saturated conditions. a. COP b. Refrigerant flow rate c. Heat loss rate in condenses
Question 2: (a) The pressure at which the steam should be reheated. (b) The thermal efficiency of the cycle. (c) Total heat input (Qin) (d) Total turbine work output (Wtur.out) (e) Draw the T-S diagram Notes: Assume the steam is reheated to the inlet temperature of the high-pressure turbine. • The moisture content of the steam at the exit of the low-pressure turbine is not to exceed 9.5% Boiler 650 C 17.5 MPa ww Reheater High-P turbine P₁ = Ps= Preheat Pump Low-P turbine Condenser e 15 KPa

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