Avapor-compression heat pump has a heating capacity of 500 kl/min and uses Refrigerant 134a asthe workingfluid. The isentropic compressor efficiency is 75%. The heat pump isdriven by a power cyclewith a thermal efficiency of 25%. Forthe power cycle, 80% of the heat rejected istransferred to the heated space. Data for thecycle are provided in thetable below. The principal states are numbered as in the figure below. Condenser Expansion valve Compressor Evaporator Saturated or superheated vapor 5 State (baг) (°C) (k/kg) (kJ/kg -K) 1 4.145 10 252.9 0.9141 25 10 42.02 271 0.9141 2 10 47.26 277.1 0.9331 3 9.6 34 97.31 0.3584 4 4.145 10 97.31 0.3645 (a) Determinethe power input to the heat pump compressor, in kW. (b) Evaluate theratio of the total ratethat heat is delivered to the heated spaceto the rateof heat inputto the power cycle.

Avapor-compression heat pump has a heating capacity of 500 kl/min and uses Refrigerant 134a asthe workingfluid. The isentropic compressor efficiency is 75%. The heat pump isdriven by a power cyclewith a thermal efficiency of 25%. Forthe power cycle, 80% of the heat rejected istransferred to the heated space. Data for thecycle are provided in thetable below. The principal states are numbered as in the figure below. Condenser Expansion valve Compressor Evaporator Saturated or superheated vapor 5 State (baг) (°C) (k/kg) (kJ/kg -K) 1 4.145 10 252.9 0.9141 25 10 42.02 271 0.9141 2 10 47.26 277.1 0.9331 3 9.6 34 97.31 0.3584 4 4.145 10 97.31 0.3645 (a) Determinethe power input to the heat pump compressor, in kW. (b) Evaluate theratio of the total ratethat heat is delivered to the heated spaceto the rateof heat inputto the power cycle.

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

See similar textbooks

Similar questions

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 to
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,
A water tube boiler produces 250,000 pounds of steam per hour at 1200 psia and1000OF from feed water entering the boiler at 1500 psia and 360oF. Fuel oil havinga higher heating value of 18,200 Btu/lb is supplied to the burners at the rate of20,700 lb/hr. Furnace volume is 1500 cubic feet. Calculate the equivalentevaporation, lb/hrA. 300,117 B. 300,317 C. 300,517 D. 300,717
27. Air is being heated with steam in a heat exchanger as shown in following fiqure. Saturated water opy yer vapor enters this unit at 35°C at a rate enters the unit at 20°C, and leaves at 30°C at same twarie, process. 10,000 kg/h and leaves as saturated liquid at Marut, iwarr Air generation associated with Determine the rate of MarutPrewari Air 20°C 32°C Steam 35°C 10,000 kg/h Marut Tiwari 30°C Marut Tiwari
Thermodynamics. Please help me out A Carnot heat engine is used to power a Carnot refrigerator that operatesbetween 258.15 K and 293.15 K. In the heat engine, water is used as theworking fluid. Heat is added to the water at 473.15 K, where it changes fromsaturated liquid to saturated vapor. Heat is rejected from the heat engine atP=20 kPa and constant temperatue. Calculate(a) The heat added to the water per kilogram of water(b) The amount of heat that must be added to the water so that therefrigerator can remove 1 kJ of heat from the cold reservoir.
Provide complete solution and detailed diagram. A refrigerator is to remove heat from the cooled space at a rate of 300 KJ/min to maintain itstemperature at - 8oC. If the air surrounding the refrigerator is 25oC, determine the minimum powerrequired for this refrigerator? A. 0.263 kw B. 0.473 kw C. 0.623 kw D. 0.984 kw
Consider a vapor compression refrigeration cycle working with R134a circulating at a flowrate of 90 kg/s. Compressor inlet is saturated vapor at 140 kPa and exits at 1200 kPa and 80oC.Condenser exit is 44oC. Find:a) Draw T-s and P-h diagrams and schematic block diagram of the cycleb) Compressor work inputc) Refrigeration capacityd) Isentropic efficiency of the compressore) 2nd law efficiency of this cycle
Bokr Py- 6000 kP Wpampin Pump Turbine P50 kPa Condenser "punpin Figure 2 (b) Determine the thermal efficiency of the cycle in part (a) when the liquid enters the pump 1.3°C cooler than a saturated liquid at the condenser pressure.
Q4// Answer A or B 201u, 4017 All What is the final part of the flue gas way of boiler furnace found to raise the temperature of water? Explain this?. Also, demonstrate briefly the water movement in power plant? B// What are the types of feedwater heaters in power plant, compare them? Explain the methods of cooling by these heaters and the ways of feeding.
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…
Exercise & with a beat capacity at constant pressure = 4.10³ kJ K², is initially at the outside air temperature T. 305 K. An air conditioner, which dithermal reversible cyclic manner Coutside air and room), brings the temperature of the operates in a 293k) in one hour. power P must have received A N = = mo ruum, 4 room to 20⁰°c CT₂ What average This air conditioner? Please answer the above question step-wise, showing detailed explanations, including diagrams if necessary. Thanks in advanced !!!! B electrical MARKU
A computer lab filled with 20 computers and 15 students is cooled by an air conditioningunit on a day where it is 90 oF outside. The room temperature is 72 oF. Assume an averagestudent generate 90 W of heat and each computer generates 150 W of heat. If the COP ofthe air conditioner is 2.5, what power input is required, in kW? If the air conditioneroperated at its maximum coefficient of performance, what power input would be required?