The vapour compression cycle (picture provided), utilises the refrigerant R134a flowing at 0.05 kg s-1. Assuming that the compression is adiabatic and reversible. If the actual input power to the compressor is 2 kW, then: 1. You need to determine the theoretical input power to the compressor and the heat transfer (Φ) to the evaporator. Take the enthalpies h1, h2, and h3 to be 238.41, 263.68 and 81.5 kJ kg-1 (use the 'NH3 Refrigeration Table' where you can find online). 2. You need to determine the coefficient of performance based on your answer to the previous question (1). 3. You need to determine the compressors mechanical efficiency.

The vapour compression cycle (picture provided), utilises the refrigerant R134a flowing at 0.05 kg s-1. Assuming that the compression is adiabatic and reversible. If the actual input power to the compressor is 2 kW, then: 1. You need to determine the theoretical input power to the compressor and the heat transfer (Φ) to the evaporator. Take the enthalpies h1, h2, and h3 to be 238.41, 263.68 and 81.5 kJ kg-1 (use the 'NH3 Refrigeration Table' where you can find online). 2. You need to determine the coefficient of performance based on your answer to the previous question (1). 3. You need to determine the compressors mechanical efficiency.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.12P

See similar textbooks

Related questions

Q: H6. An air conditioner in an upper-floor apartment unit is turned on during a hot summer afternoon.…

A: Given: The heat removed from the interior, Q = 1.5 kW

Q: Q1/Water enters a boiler at (323°K & 5 Mpa), and leaves as steam at (673°K & 5 Mpa). The heat…

Q: mmonia and air pass through the heat exchanger. While the ammonia is entering as a superheated vapor…

A: The inlet pressure of ammonia is The inlet temperature of ammonia is The exit pressure of ammonia is…

Q: 2000 kg cast iron hoisin at 350 degree Celsius is quenched in 4000 kg of water at 15 degree Celsius.…

A: Given that , mass of cast iron (mci)=2000kgIntial temperature of cast iron(Ti)=350°C=623Kmass of…

Q: an ideal adiabatic compressor compresses air from 1 atm to 5atm. The inlet temperature is 293K and…

Q: Ammonia and air pass through the heat exchanger. While the ammonia is entering as asuperheated vapor…

A: b) 462328 KJc) 18401.114 kg/hrExplanation:

Q: THE COMPRESSOR INLET AIR TEMPERATURE IN A GAS TURBINE PLANT IS 99C. CALCULATE THE COMPRESSOR AIR…

A: Correct answer: A 499 C

Q: A steam turbine at a nuclear power station takes steam in at 10kg/s, a temperature of 600°C and a…

Q: 40°C 4. A mixing chamber receives 5 kg/min of ammonia as saturated liquid at -20°C from one line (1)…

Q: Problem 1-Closed system isentropic process Internal combustion engines (ICE) use pistons and…

A: Disclaimer:Hello. Since you have submitted multiple questions, we will solve the first one for you.…

Q: Ex3) The compressor in a plant (see Fig. 4.9) receives carbon dioxide at 100 kPa, 280 K, with a low…

Q: Q3/ A refrigeration unit of 20 T.R uses R-12 as a refrigerant and works between evaporating and…

Q: A vapour absorption refrigeration system works with a generator temperature of 87⁰C, absorber…

A: Given Data:

Q: Steam is supplied to a two-stage turbine at 40 bar and 350°C. It expands in the first turbine until…

A: To find The work output, the heat supplied specific steam consumption, and the cycle efficiency.…

Q: An ammonia refrigerator produces 20 tonnes of ice per day at 0°C. The condensation and .2…

A: Given: The refrigerator produces 20 tonne ice per day. Fusion of ice→hfg=335 KJ/Kg And one tonne=907…

Q: The power of a steam turbine in a thermal power plant is 60 MW. Water vapor enters the turbine at…

A: Given data: The power of the steam turbine is P=60 MW=60×103 kW The initial pressure in the turbine…

Q: Find the refrigeration capacity (in TR ) required to cool 29 m³/min from 29°C to 18°C if air from…

Question

I need help on the following question:

1. You need to determine the theoretical input power to the compressor and the heat transfer (Φ) to the
evaporator. Take the enthalpies h1, h2, and h3 to be 238.41, 263.68 and 81.5 kJ kg-1 (use the 'NH3 Refrigeration Table' where you can find online).

2. You need to determine the coefficient of performance based on your answer to the previous question (1).

3. You need to determine the compressors mechanical efficiency.

P @ 5.673 bar 3
T@ 15 °C
P @ 0.8071 bar
T@ -35 °C
Warm condenser
I
Cold evaporator
Dout
Φ
in
2 P@ 5.673 bar
T @ 50 °C
Compressor
1
P @ 0.8071 bar
T@ -20 °C

Branch of science that deals with the stationary and moving bodies under the influence of forces.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Given data

VIEW

Step 2: 1) Calculation of theoretical input power to the compressor and the heat transfer to the evaporator

VIEW

Step 3: 2) Calculation of the COP using results in 1

VIEW

Step 4: 3) Calculation of the compressor mechanical efficiency

VIEW

Solution

VIEW

Step by step

Solved in 5 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

Use propagation of error to calculate the uncertainty of latent heat of fusion in water
Homwork-6.png Homework-6 P.1 Calculate the dryness fraction (quality) of steam which has 1.5 Kg of water in suspension with 50 Kg of steam? A vessel having a volume of 0.05 m contains a mixture of saturated water and saturated steam at a temperature of 245 ° C. The mass of liquid present is 10 Kg. P.2 Find the following: (a) The pressure. (b) The mass. (c) The specific volume. (d) The specific enthalpy (e) The specific entropy. (f) The specific internal energy.
Apply the ideal gas equation and calculate the volume (units: m3) for a single tank in at its fully pressurised state inside the plant room.
please anwser task 2
Part I : Analysis of heat exchangers in engineering applications(max. 5 pages)Select any thermal energy system you are interested. Describe the system and statehow the system works. The system should have at least one heat exchanger.Analyse the design of the heat exchangers and their functions in the system. Part Iand Part II are connected. Select a system you are able to complete the exergyanalysis in Part II.Part II: Exergy analysis & performance optimisation of heat exchangersfor a thermal energy system (max. 5 pages)Perform exergy analysis and performance optimization of the thermal energy systemin Part I. For the above question, the thermal energy system i have chosen is a steam rankine cycle, so for part II, i would like exergy analysis and performance optimistaion to be done 3 times over for a steam rankine cycle, show full working calculations for each and explanations. Provide references for any values used.
Part I : Analysis of heat exchangers in engineering applications(max. 5 pages)Select any thermal energy system you are interested. Describe the system and statehow the system works. The system should have at least one heat exchanger.Analyse the design of the heat exchangers and their functions in the system. Part Iand Part II are connected. Select a system you are able to complete the exergyanalysis in Part II.Part II: Exergy analysis & performance optimisation of heat exchangersfor a thermal energy system (max. 5 pages)Perform exergy analysis and performance optimization of the thermal energy systemin Part I.
Problem 03.028 - DEPENDENT MULTIPART PROBLEM - ASSIGN ALL PARTS NOTE: This is a multi-part question. Once an answer is submitted, you willI be unable to return to this part. A 1.9-m3 rigid tank contains steam at 220°C. One-third of the volume is in the liquid phase and the rest is in the vapor form. The properties of steam at 220°C are given as follows: vf= 0.001190 m3/kg and vg= 0.08609 m3/kg. Steam Vm3 220°C Problem 03.028.b - Quality of a saturated mixture Determine the quality of the saturated mixture. (You must provide an answer before moving to the next part) The quality of the saturated mixture is
suppose that an unsaturated air mass is rising and cooling at the dry adiabatic lapse rate found in problem 1.40. If the temperature at ground level is 25 degrees celsius and the relative humidity there is 50%, at what altitude will this air mass become saturated so that condensation begins and a cloud forms?Refer to this graph.
DS Community Downl... Haritalar EOkuma list iş İÇİN Giriş yap 口口山凸9 İNGİLİZCE An air-cooled condenser is used to condense isobutane in a dual geothermal power plant. Isobutane, air entering at 22 oC with a flow of 18 kg/s (cp = 1.0 kJ / kg.K)is condensed at 85 oC. The total heat transfer coefficient for this heat exchanger is 2400 W/m2.K and surface area is 2.6 m2. What is the output temperature of the air? Çeviri yap: Google Bing
3:57 A Done lecture 7_b5ee35c08478147bb8a3744a... Lec. (7) tar -Dry bulb temperature O Example (1): An air conditioning equipment (figure) have the following: - Supply air mass-1.26 kg/s. The cooling coil receives 20 % outdoor air and 80% return air. tdz Fig. 18.14. Representation of supply air condition and room design condition. 0.252 kg/s Refrigeration and A/C - Outdoor air conditions are: 28°C db, 19.5°C wb Return air conditions are: 22°C db, 50% RH. The mixture air condition outlet the cooling coil are: 10°C db, 0.00735 kg/kgda Draw the system on the Psychrometric chart, then calculate: 1. Cooling coil load. 2. Room sensible heat. 3. Room latent heat. 4. Fresh (outdoor) load. 5. Duct and fan heat gain 6. Sensible heat ratio SHR. If the supply air temperature increases with a value 1°K due to fan motor heat gain and 2°K due to duct heat gain. . ← 1.008 kg/s R to Dr. Omar M. Ali LTE الغرفة المراد تكييفها (22,50 %) 1.26 kg/s R Grand Sensible Heat Factor It is defined as the ratio of…
Water melts as temp increases because : - chemical potential of the liquid is lower than that of gas - liquid and solid form eutectic mixture -chemical potential of the liquid and solid become equal
ZV7 ZAIN IQ BigBlueButton - Reheat.. t014.rna1.blindsidenetworks.com 37:28 Rankine Cycle ... Ali Khaleel Kareem O Homework Example 2: 2.6 (Page 45) In a stream power plant, the steam mass flow rate is 80ton/h, the steam inters the turbine at 6MPA and 480 °C, condenser pressure = 0.06MPA, mechanical and electrical efficiencies are 0.96 & 0.95, respectively. Find the specific steam consumption and the power output. Example 3: 2.7 (Page 46) Find the cycle efficiency and specific steam consumption of a reheat cycle (Error! Reference source not found.) operating between pressures of 3MPA and 0.004MPA, with superheat temp of 450 °C. Assume that the first expansion is carried out to the point where the steam is dry saturated and then the steam is reheated to the original superheat temp. The feed pump term may be neglected.