ervi n.k2603@sadiq.edu.iq SwMO AslacelAsiacelljjs 0701The name and photo associated with your Googleaccount will be recorded when you upload filesand submit this form. Your email is not part of070Eyour response.RequiredUntitled Question *Q1: Refrigerant-134a is the working fluid in an ideal compression refrigeration cycle.The refrigerant leaves the evaporator -20°C and has a condenser pressure of 0.9 MPa.The mass flow rate is 3 kg/min. Find COP, COPR Carnot for same Tma and Tmin , and thetons of refrigeration.1 Add fileUntitled Question *Q2: A simple VCRC using R-134a operates with a condensing temperature of 30°c andan evaporating temperature of -20°c .The system produces 50 kw of refrigeration.Determine the : a) Thermodynamic property values at the four main state pointsof the cycle, b) COP, c) Rate of refrigerant flow.1 Add fileSubmitClear formThis form was created inside of tmam Ja'afar Al-Sadiaوأثق السلأمي11:41p äc lull 22.04.02

Answered: Image /qna-images/answer/d9a70c60-54ed-4efe-ac52-66da9fe279ef.jpg

ccount will be recorded when you upload files nd submit this form. Your email is not part of our response. Required Intitled Question Q1: Refrigerant-134a is the working fluid in an ideal compression refrigeration cycle. The refrigerant leaves the evaporator-20°C and has a condenser pressure of 0.9 MPa. The mass flow rate is 3 kg/min. Find COP, COP, Cat for same Tma and Tmin , and the tons of refrigeration. 1 Add file

ccount will be recorded when you upload files nd submit this form. Your email is not part of our response. Required Intitled Question Q1: Refrigerant-134a is the working fluid in an ideal compression refrigeration cycle. The refrigerant leaves the evaporator-20°C and has a condenser pressure of 0.9 MPa. The mass flow rate is 3 kg/min. Find COP, COP, Cat for same Tma and Tmin , and the tons of refrigeration. 1 Add file

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

3. When subcooling the liquid refrigerant:a. the refrigerating effect per unit mass increases. b. the mass rate of flow per unit capacity decreases. c. the volume flow rate per unit capacity decreases. d. the work of compression per unit mass remain the same. e. the COP increases. f. the theoretical power per unit capacity decreases. A simple saturated refrigeration cycle for R-12 system operates at an evaporating temperature of - 5oC and condensing temperature of 40oC. Show the effect from a to f if the liquid refrigerant is subcooled to 30 oC.
Q2) The following data relate to a regenerative steam power plant generating 22500 kW energy, the alternator directly coupled to steam turbine : Condition of steam supplied to the steam turbine 60 bar, 450 degrees * C Condenser vacuum ... 707.5 mm Pressure at which steam is bled from the steam turbine ... 3 bar Turbine efficiency of each portion of expansion ... 87 per cent Boiler efficiencyper cent Alternator efficiency ... 94 per cent Mechanical efficiency from turbine to generator ... 97 per cent Neglecting the pump work in calculating the input to the boiler, determine (i) The steam bled per kg of steam supplied to the turbine. (ii) The steam generated per hour if the 9 percent of the generator output is used to run the pumps. (iiiThe overall efficiency of the plant.
For the NH3/H2O cycle the following relationship give the solution flow rate per unit refrigeration rate: WFS_A * X - WFS_G(X-1) = 1 whereWFS_A = mass fraction of NH3 in solution form the absorberWFS_G = mass fraction of NH3 in solution from the generator X-1 =mass of solution from the generator per unit mass of refrigerant flowFor large systems, a reasonable pressure drop between the evaporator and absorber is 1.5 psiConsider a large NH3/H2O plant operating per the schematic below: Known/given:i. Refrigeration load = 500 tonsii. Evaporator temperature (state point 10) = 41.1 Fiii. Evaporator pressure (state point 10) = 75 psiaiv. Absorber pressure (state point 11) = 73.5 psia (per rule of thumb above regarding pressure drop between the evaporator and absorber)v. Strong aqua solution temperature (state point 3) = 105 Fvi. Condenser temperature (state point 8) = 100 Fvii. Condenser and tower pressure (state point 7) = 211.9 psiaviii. Concentration split, WFS_G - WFS_A =6% by weight…
A steam power plant operates between the pressure limit of 3.0 Mpa for the boiler and 40 kPa for the condenser. If the plant operates in an ideal Rankine cycle with superheated vapor enters the turbine at 3 Mpa and 500 oC, determine:a) the moisture content at the inlet of the condenser,b) the net work per unit mass of steam flowing, in kJ/kg,c) the heat transfer to the steam in the boiler in kJ per kg of steam,d) the thermal efficiency,e) the heat transfer to cooling water passing through the condenser, in kJ per kg of steam flowing. h1 (kJ/kg) Format : 227.25 v1 (m3/kg) Format : 0.002092 h2 (kJ/kg) Format : 320.445 h3 (kJ/kg) Format : 8765.2 s3 (m3/kg) Format : 4.7267 x4 Format : 0.959 h4 (kJ/kg) Format : 7845.82 W (kJ/kg) Format : 555.79 Qin (kJ/kg) Format : 6362.75 Efficiency (%) Format : 50.83
use the refrigerant tables (134a for example) MODULE: THERMODYNAMICS QUESTION 1 A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated vapour to saturated liquid at 70°C in the condenser as it rejects heat. The evaporator pressure is 100 kPa. Show the cycle on a T-s diagram relative to saturation lines , and determine (a) The coefficient of performance, (b) The amount of heat absorbed from the refrigerated space (c) The network input. a. 2.56 ; 89.20 kJ/kg ; 213.29 kJ/kg b. 2.56 ; 89.20 kJ/kg ; 30.89 kJ/kg c. 2.56 ; 89.20 kJ/kg ; 17.89 kJ/kg d. 2.56 ; 89.20 kJ/kg ; 34.89 kJ/kg
1st Step: Evaluate the performance of the Refrigerator 1.Refrigerator 1 operates as a reverse Carnot cycle using R-717 as the refrigerant at aflow of 1.8 kg/s. The condensing and evaporating temperatures are 25 °C and -5 °C, respectively.To evaluate the performance of Chiller 1, you must determine the following performance parameters:project:a) Rate of heat elimination in the condenser (Q );b) The power of the compressor;c) The COP of the cycle.For the energy balance, make the following considerations:- Permanent regime;- Variation of kinetic energy and potentials are negligible;- Compressor and turbine operate adiabatically;- Evaporation and condensation steps do not involve work. Please, make it typeable, written in virtual text, do not do it by hand and do not take a photo, it interferes with the understanding of the lyrics.
1. A steam power plant operates on Rankine cycle. The steam enters the turbine at 7MpA and 550 degrees celsius with a velocity of 30m/s. It discharges to the condenser at 20kpa with a velocity of 90m/s. For a flow of 37.8 kg/s. Determine: a. The schematic and T-S diagram of the cycle. b. The enthalpies on each state. c. Total Heat added d. Heat rejected in the condenser e. Net work f. Cycle EfficiencyP.S. Please help me with this question. Im having a hard time with this. Thank you very much and please show your solution.
Provide an expert insight about the methods used to increase thermal efficiency of a steam power plant.
A8 A controlled-temperature storage room is maintained at the desired temperature by an R-134a refrigeration unit with evaporator and condenser temperatures of –20oC and 40oC respectively. Sketch a fully labelled-diagram of the cycle on pressure-enthalpy co-ordinates. Use the combination of tables and the superheated region for refrigerant R-134a to answer this question.
Problem # 2: In a steam thermal plant, it operates with a condenser outlet temperature of 180 ° F, and a boiler outlet temperature of 1000 ° F. If the pressure at the pump outlet is 300 psia. If the efficiencies of the turbine and pump are 85%. Determine: a.) The real work of the turbine, in Btu / Ibm. b.) The actual work of the pump, in Btu / Ibm. c.) The thermal efficiency of the real cycle. d.) The thermal efficiencies of the ideal cycle and Carnot. e.) Diagram T vs s, with all possible values and indicating the real and ideal cycles.
For the NH3/H2O cycle the following relationship give the solution flow rate per unit refrigeration rate: WFS_A * X - WFS_G(X-1) = 1 where WFS_A = mass fraction of NH3 in solution form the absorber WFS_G = mass fraction of NH3 in solution from the generator X-1 =mass of solution from the generator per unit mass of refrigerant flow For large systems, a reasonable pressure drop between the evaporator and absorber is 1.5 psi Consider a large NH3/H2O plant operating per the schematic below: Known/given: i. Refrigeration load = 500 tons ii. Evaporator temperature (state point 10) = 41.1 F iii. Evaporator pressure (state point 10) = 75 psia iv. Absorber pressure (state point 11) = 73.5 psia (per rule of thumb above regarding pressure drop between the evaporator and absorber) v. Strong aqua solution temperature (state point 3) = 105 F vi. Condenser temperature (state point 8) = 100 F vii. Condenser and tower pressure (state point 7) = 211.9 psia viii. Concentration split, WFS_G - WFS_A =6%…
Problem 2 – Heat Pump Thermodynamic Analysis Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 50°C at a rate of 35 L/min and leaves at 750 kPa subcooled by 3°C. The refrigerant enters the compressor at 200 kPa superheated by 3°C. Neglecting changes in kinetic and potential energy and any stray heat transfer, please answer the following. a. Create a schematic of the cycle, use the same numbers used in your textbook for the inlet and exit states of each device, and include the energy exchanges between the cycle devices and the surroundings. b. Sketch the cycle processes on a T-s diagram. c. Determine the isentropic efficiency of the compressor. d. Compute the rate of heat supplied to the heated room. e. Determine the COP of the heat pump.