3. A heat engine operating between a geothermal steam source at 205°C and a riv-er at 18°C achieves an efficiency of 22%. What percentage of its theoretical max-imum efficiency is it achieving? 5. A certain engine is filled with gasoline that contains chemical energy nwhen the engine is started, it begins transforming that chemical energy intesmechanical energy. Over the course of a few seconds, the engine transforms8,000J of chemical energy, but 4,000) of that energy is 'wasted' in the form ofthermal energy.2 How much energy does the engine transform into useful mechanicalenergy during these few seconds?b. Calculate the efficiency of this engine.

Answered: Image /qna-images/answer/245547be-b1d3-4690-a8ad-7e1e2a1559b6.jpg

Answered: 3. A heat engine operating between a…

3. A heat engine operating between a geothermal steam source at 205°C and a riv- er at 18°C achieves an efficiency of 22%. What percentage of its theoretical max- imum efficiency is it achieving?

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.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.75P: Referring to Problem 1.74, how many kilograms of ice can a 3-ton refrigeration unit produce in a...

See similar textbooks

Related questions

Q: A refrigerator use 134a as the working fluid and operates on an ideal vapor- compression cycle…

Q: A heat engine is assumed to operate on a Carnot cycle. It receives 900kJ heat from a high…

A: "Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: heat removal rate from the refrigerated space and the power input to the compressor are 9.0KW and…

A: Given:Qr=9.0 kWP=1.8 kW

Q: SL-3 A refrigerator with K-4 and a reversible heat engine operate between two heat reservoirs at…

A: Solution: Given Data: COP = 4 Tc = 300 K Th = 400 K Wen = 500 J Note: Dear Student! As per our…

Q: A heat engine using lake water at 12oC as source and the surrounding atmosphere at 2oC as sink…

Q: The evaporator pressure of the vapor compression heat pump using R-134a as a refrigerant, which you…

A: Heat Pump Heat pump is a device which used to transfer heat from lower temperature body to higher…

Q: Consider a residential heat pump that uses lake water as a heat source in the winter and a heat sink…

Q: A heat engine operating with a hot reservoir of furnace gases at 2300 °C. The cooling water is…

Q: A solar energy based HE which recieves 60KJ of heat at 900C and rejects 50kJ of heat to the ambient…

A: Given data, Q1= 60 kJ ,T1= 90°C Q2= 50 kJ ,T2= 30°C

Q: QI: a) What are the main reasons behind using water vapor in thermal power plants? b) What is the…

A: As these 2 questions are different and we are suppose to solve only one question. Please post other…

Q: A refrigerator uses refrigerant 134a as the working fluid and operates on an ideal vapor-compression…

Q: A cyclic heat engine operates between a source and sink that are respectively at temperatures of…

A: Given Data Temperature of source is : T1=1000°C=1273 K Temperature of sink is : T2=50°C=323K…

Q: 6-A heat engine receives 6kW from 250°C source and reject heat at 30°C. Examine each of three cases…

A: Heat input, Qin= 6 kW= 6000 W Source temperature, T1= 250∘C= 250+ 273 K= 523 K Sink temperature, T2=…

Q: A Carnot heat engine with working temperature of 250 °C and 25 °C, absorbs heat at 400 kJ/min. The…

Q: Thermodynamics review that I cannot solve! Would appreciate some or all done out A heat engine…

A: Note: As per our guidelines we are supposed to answer only the first 3 sub-parts. Kindly repost…

Q: orbing heat from the cold outdoors at 5 degrees celsius and supplying heat to a house at 22 degrees…

A: Given:TL=5°C =268 KTH=22°C =295 KQH=18000 KJ/h =180003600 KWP=2.5 KW

Q: A heat pump supplied heat to a residential house having an average temperature of 32 °C. The heat…

Q: A high temperature source supplies a heat engine with 20 kJ of energy. If the engine rejects 4kJ to…

A: Given Data : The Heat Energy of the source supplied to the engine = Qin = 20 KJ The heat Energy…

Q: What is the COP of an ideal heat-operated refrigeration cycle that receives the energizing heat from…

Q: An ideal Solvay refrigerator utilizing nitrogen as the working fluid operates between 0.101 and 2.02…

Q: Source TH Carnot HE net,out 800 Btu/min

Q: Explain the thermodynamics cycle of a refrigerator?

A: given; Explain the thermodynamics cycle of a refrigerator?

Q: In an effort to conserve energy in a heat-engine cycle, somebody suggests incorporating a…

A: Given: In order to conserve energy in a heat engine cycle, incorporating a refrigerator that will…

Q: 3- Asteady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The…

A: The term refrigeration means cooling a space, substance, or system to lower and/or maintain its…

Q: What is the maximum possible theoretical efficiency of a heat engine operating with a hot reservoir…

A: Data given - TH = 2127°C = 2400 K TL = 27°C = 300 K

Q: 5-Consider a heat pump that operates on the ideal vapor compression refrigeration cycle with R-134a…

Q: A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor-compression…

Q: Refrigerator 1 simulates an ideal refrigerator and therefore operates on a Carnot cycle using R-134a…

Q: A power plant is operating at a maximum efficiency of 50%. The plant's boiler is operating at a…

A: Stream powerplant converts the energy stored in fossil fuels, for example, coal, oil, natural gas,…

Q: An ideal refrigerator is operating between 37°C and – 13°C. The power required per ton of…

A: Given, Temperature of hot reservoir = TH = 37 oC = 310 K Temperature of cold reservoir = TL = -13 oC…

Q: A refrigeration system operates on the reversed carnot cycle. If the heat added and heat rejected in…

A: Given Data: The heat added to the system is, Qa=5000 kJ/min. The heat rejected from the system is,…

Q: A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor-compression…

A: Given:Pe=0.12 MPaPc=0.7 MPam=0.05 Kg/s

Q: Energy Flux Malaysia has just launched a new type of house refrigerator system using R-134a as a…

Q: A simple vapor compression cycle develops 15 tons of refrigeration using ammonia as refrigerant and…

Q: The following information is provided for a refrigerator operating on the a vapor-compression…

Q: A Carnot Engine receives 250 KJ/s of heat form a heat-source reservoir at 525ºC and rejects heat to…

Q: A refrigerator operating using vapor-compression cycle uses R-134a as a working fluid. The condenser…

A: Note: As per Policy we can solve first three subparts. Please resubmit the remaining subparts.

Q: Consider a heat pump that operates on the ideal vapor-compression refrigeration cycle with R-134a as…

Q: The objective of a refrigerator is to remove QL from the cooled space.

A: objective of refrigerator

Q: Steam turbine receives steam at 9.5 MPa, 540°C and the condenser at 0.01 MPa. Steam are extracted at…

Q: Anideal refrigeration cycle that has a condenser temperature of 25°C and an evaporator temperature…

A: Given : T1 = T4 = -25 C T3 = 25 C R-410a refrigerant To find: Work input , heat absorbed by…

Q: Consider a refrigeration system using refrigerant-134a as the working fluid. If this refrigerator is…

Q: A heat engine is assumed to operate on a Carnot cycle. It receives 900kJ heat from a high…

A: Given details: TL=30°CTH=550°CQH=900 kJ Note: According our guideline I solved only first 3 part so…

Question

3. A heat engine operating between a geothermal steam source at 205°C and a riv-
er at 18°C achieves an efficiency of 22%. What percentage of its theoretical max-
imum efficiency is it achieving?

5. A certain engine is filled with gasoline that contains chemical energy n
when the engine is started, it begins transforming that chemical energy intes
mechanical energy. Over the course of a few seconds, the engine transforms
8,000J of chemical energy, but 4,000) of that energy is 'wasted' in the form of
thermal energy.
2 How much energy does the engine transform into useful mechanical
energy during these few seconds?
b. Calculate the efficiency of this engine.

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

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Why is two-stage compression popular for extra-low-temperature refrigeration systems?
Referring to Problem 1.74, how many kilograms of ice can a 3-ton refrigeration unit produce in a 24-h period? The heat of fusion of water is 330 kJ/kg.
Describe the function and components of a heat engine?
A heat pump is installed in a building to heat the space to a constant 22 ⁰C when the outdoor temperature is 15 ⁰C. The heating requirement at these conditions is 30 kW. The system uses R-410a as a refrigerant and operates according to an ideal vapor compression cycle as shown in the figures below. The saturation temperature of the refrigerant in the indoor coil is typically 20 ⁰C higher than the desired space temperature, and the saturation temperature of the refrigerant in the outdoor unit is typically 20 ⁰C lower than the outdoor temperature. (one of those coils is the condenser, the other is the evaporator) Determine the states at points 1 through 4.
A heat engine using lake water at 12oC as source and the surrounding atmosphere at 2oC as sink executes 1080 cycles per min. If amount of heat supplied per cycle is 57 J, what is the output of the engine?
What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0ºC and a cold reservoir temperature of −20.0ºC? (b) How much heat transfer occurs into the warm environment if 3.60 × 107 J of work (10.0 kW · h) is put into it? (c) If the cost of this work input is 10.0 cents/kW · h, how does its cost compare with the direct heat transfer achieved by burning natural gas at a cost of 85.0 cents per therm. (A therm is a common unit of energy for natural gas and equals 1.055 × 108 J.)
A heat engine is assumed to operate on a Carnot cycle. It receives 900kJheat from a high temperature reservoir at 550oC and rejects heat to a lowtemperature reservoir at 30oC.a. Calculate the thermal efficiency of the cycle.b. What is QH and QL?c. What is the net work produced by this cycle?d. Does this process violate Kelvin-Plank statement? Explain.e. An inventor claimed that he built a heat engine operating between the same reservoirs that give a thermal efficiency of 80%.Comments about his claim.f. Draw this process on a Ts diagram with proper labelling.g. If the cycle is reversed and operated as a heat pump, calculate itsperformance.
Why heat engines are intentionally equated at high temperatures?
A refrigeration system is to be used to constantly maintain a space at -12°C in an industrial cooling space. The estimated cooling rate of 96826 kJ/h when the outside temperature is 24°C. Determine the minimum power required to drive this refrigerator if analysis is based on Carnot cycle. Provide answer to 2 decimal places. Use 1°C=273 K if necessary.
A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -30°C by rejecting waste heat to cooling water that enters the condenser at 20°C at a rate of 0.25 kg/s and leaves at 28°C. The refrigerant enters the condenser at 1.2 MPa and 50°C and leaves at the same pressure subcooled by 5°C. If the Talking PIYATIDA TENURUK compressor consumes 3.7 kW of power, determine (a) the mass flow rate of the refrigerant (b) the refrigeration load (c) the COP (d) the minimum power input to the compressor for the same refrigeration load
What is the highest possible theoretical efficiency of a heat engine operating with a hot reservoir of furnacegases at 2000°C when the cooling water available is at 10°C ?
Refrigerator 1 simulates an ideal refrigerator and therefore operates on a Carnot cycle using R-134a as the refrigerant at a flow rate of 1.4 kg/sec. The condensing and evaporating temperatures are 30 °C and -10 °C, respectively. To assess the performance of Refrigerator 1, you must submit the report. of the project with the following information: d) The work generated by the turbine; e) The condenser heat rejection rate (Q H); f) The coefficient of performance of the cycle.