7. An automobile engine consumes fuel at a rate of 22 L/h and delivers 55 kW of power to the wheels. If the fuel has a heating value of 44,000 kJ/kg and a density of 0.8 g/cm³, determine the efficiency of this engine. Hint, Qa= mass of fuel * heating value

7. An automobile engine consumes fuel at a rate of 22 L/h and delivers 55 kW of power to the wheels. If the fuel has a heating value of 44,000 kJ/kg and a density of 0.8 g/cm³, determine the efficiency of this engine. Hint, Qa= mass of fuel * heating value

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.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.46P

See similar textbooks

Related questions

Q: A heat machine that can produce up to 880 kJ of work by taking waste heat from a melting furnace…

A: Given Data W = 880KJ Th=1330C Tl = 77C To find the highest efficiency of the heat sink

Q: 9) Which of the following is not the intensive property (a) pressure (b) temperature (c) density (d)…

A: Solution:

Q: The formation of frost on cooling coils in a refrigerator A) Increases heat transfer B) Improves…

A: Increases power consumption

Q: 1. A 6-cylinder, 4-stroke marine diesel engine generally operates at 3000 revolutions per minute…

A: Given dataN=3000 rpmT=299KN=6API=28v˙=600 liter/hr=6001000m3/hr

Q: Which of the following is the mass flow rate (mass flow) of a fluid with a specific volume of 0.0011…

Q: A Carnot engine operating between 775 K and 305 K produces 51.18 Btu of work. Calculate the heat…

Q: A thermal efficiency of a combustion chamber valued equal to 73.15% with heat supplied to the system…

A: Given: Thermal efficiency = 0.7315 Heat supplied = 125 BTU = 125 x 1.1= 137.5 KJ

Q: The transfer of energy from molecule to molecule is called A. deposition B. entropy C.…

A: TYPES OF HEAT TRANSFER CONDUCTION CONVECTION RADIATION CONDUCTION = IT IS A HEAT TRANSFER IN…

Q: You work as a maintenance engineer at Al-Hussein Thermal Power Station that produces electricity. It…

A: Given data: Capacity of thermal power station: W˙=260 MW, which consists of 2 units each generating:…

Q: The roofs of many homes in the United States are covered with photovoltaic (PV) solar cells that…

Q: Q15: A system comprising a single phase is called a* O (a) closed system O (b) open system O (c)…

A: Given Statement:- A system comprising a single phase is called a ____. Options Provided:- Closed…

Q: Represent the Carnot cycle as a square on the T-S plane. Now inscribe within the square of a circle…

A: Given question: Represent the Carnot cycle as a square on the T-S plane. Now inscribe within the…

Q: A refrigerating system operates on the reversed Carnot Cycle. The higher temperature of the…

Q: 1. Is a temperature difference necessary to operate a heat engine? State why or why not. 2.…

A: Hi! Thank you for the question As per the honour code, We’ll answer the first question since the…

Q: 14. Assuming that the Philippines is consuming 3.5×10^20 kWh of electrical energy in one year and…

Q: 2)A)What is convection in Heat Transfer ? B)Does the convection affect the lifetime of the turbine?…

A: 2(A) Convection is a heat transfer phenomenon in that bulk movement of molecules within fluids. The…

Q: 3)A)What is radiation in Heat Transfer ? B)Does the radiation affect the lifetime of the turbine?…

A: Radiation is a heat transfer between two bodies in which there is no direct contact between two…

Q: A 72 MW thermal power plant, which receives heat from a thermal source at 420℃, leaves 30 MW of heat…

Q: A four-cylinder four-stroke petrol engine with the following specifications: - The bore(diameter) =…

A: Petrol engine works on otto cycle. in which chemical energy of petrol is converted into heat energy…

Q: Use energy-flow diagrams to show that the existence of a perfect heat engine would permit the…

A: To find :- Use energy-flow diagrams to show that the existence of a perfect heat engine would…

Q: An automobile engine operates at a fuel air ratio of 0.05, volumetric efficiency of 90% and…

A: Given:Volumetric efficiency= 90 %indicated thermal efficiency= 30%Calorific value of the fuel= 45…

Q: 1. Consider the following schematic of a power plant (operating in what is called a 'Rankine Cycle')…

A: From steam table, at 6200 KPa pressure Tsat = 277.688°C hf1 = Enthalpy of saturated liquid at 6200…

Q: A laser doppler velocimeter was used to determine velocity of the water flow in an open channel…

A: Given data:- Width of triangular section = 0.531m Hight of section = 0.702m Velocity = 6.11 m/s

Q: Assuming an average 35% efficiency for power plants and a heating value of approximately 7.5 MJ/kg,…

A: Write the given data with suitable variables: η=35%H=7.5 MJ/kg

Q: An electric water heater is supplied with a current of 0.2 Ampere from a 120 Volt source. What is…

Q: Question 6 6.1 State the law of conservation of energy 6.2. A body is stationary on top of a…

Q: 1. Prepare an engine heat balance and distribution of energy table for the following test data…

A: Given;

Q: A gasoline powered car (internal combustion engine) has utilizes the following energy conversion…

A: A gasoline-powered car is an internal combustion engine that uses gasoline as fuel to generate…

Q: The following heat engines produce power 95,000 kW. Determine in each case the rates at which heat…

Q: A 5-feet diameter Chimney is designed to handle a flue gas produced in a steam power plant at a rate…

A: The goal of a chimney is to exhaust combustion products (smoke and gases) from the appliance onto…

Q: When determining the thrust developed by a jet engine, a wise choice of control volume is (a) Fixed…

A: When determining the thrust developed by the jet engine of an airplane cruising at a constant…

Q: B) An engine with an indicated thermal efficiency of 50% and mechanical efficiency of 45% consumes…

A: Given The indicated thermal efficiency is ηth=50%. The mechanical efficiency is ηME=45%. The fuel…

Q: 1)A)What is Conduction in Heat Transfer ? B)Does the Conduction affect the lifetime of the turbine?…

A: 1(A) Conduction: Conduction is a way of transferring the heat from one solid object to another solid…

Q: QUESTION 1 Match the laws accordingly. | 1st law of thermodynamics A. No Heat Engine can be more…

A: Thermodynamics has four law , each law state about thermal interaction, heat transfer entropy…

Q: 1. A cooling tower has an efficiency of 65%. Water enters the tower at 55°C. The wet bulb…

A: Dear student, we are suppose to solve only one question. Please post other question as a separate…

Q: the differences, at least ten, between thermal and hydroelectric power plants. Explain the "mode of…

A: Hydroelectric power plant, first the potential energy of water is convert into kinetic energy and…

Q: a. Explain the following terms related to thermodynamics: i. Closed system. ii. Intensive property.…

A: GIVEN DATA SOME THERMODYNAMIC TOPIC GIVEN WE HAVE TO WRITE DEFINITION OF IT

Q: A diesel electric plant in one of the remote provinces in the South utilizes diesel fuel with a ˚API…

Q: 11. Assuming that the Philippines is consuming 3.5×10^20 kWh of electrical energy in one year and…

A: Given Data P= 3.5×1020 kWh

Q: __________ gives 'it is impossible to construct a device that operates in a cycle whose sole effect…

Q: An office heater puts out 2090 Btu (British thermal units) of energy in the form of heat per hour.…

Q: during the working stroke of an engine the heat transferred out of the system was 160kJ/kg of…

A: GivenQ=-160kJ/kg (the heat transferred out of the system)∆U=-405kJ/kg

Q: 3. The following are the Heat rate curves pertaining to three units in a plant. Unit 1: Min 250 MW,…

Q: The larger the specific volume, the greater the work produced (or consumed) by a steady-flow device.

A: This statement is true

Q: A Carnot engine operating between 757 deg.K and 305 deg.K produces 54 kJ of work. Determine the heat…

A: It is the very basic numerical of thermodynamics. And used concept is Carnot heat engine.p

Q: Prepare an engine heat balance and distribution of energy table for the following test data gathered…

A: Given;

Concept explainers

Hydronics

Question

7. An automobile engine consumes fuel at a rate of 22 L/h and delivers 55 kW of power to the
wheels. If the fuel has a heating value of 44,000 kJ/kg and a density of 0.8 g/cm?, determine
the efficiency of this engine. Hint, Qa= mass of fuel * heating value

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

The maximum thermal efficiency possible for a power cycle operating between 1096°F and 267°F is _____. Express in four significant figures, not in percentage.
1. A cooling tower has an efficiency of 65%. Water enters the tower at 55°C. The wet bulb temperature of surrounding air is 27°C. What is the temperature of water leaving the tower? a. 36.8°C b. 44.5°C c. 46.9°C d. 30.4°C 2. The change of temperature entering the cooling tower and wet bulb temperature of surrounding air is 25°C and efficiency is 65%. If mass of water leaving the tower is 10 kg/s, determine the heat carried by air. a. 720 kW b. 540 kW c. 680 kW d. 700 kW 3. The approach and efficiency of cooling tower is 10°C and 60%, respectively. If temperature of water leaving the tower is 37°C, what is the temperature of water entering? a. 46°C b. 52°C c. 68°C d. 48°C 4. A cooling tower is used to cool a jacket water loss from the engine. The heat generated by fuel is 2,500 kW and cooling loss is 30%. If temperature range of the tower is 15°C. Determine the mass flow of water entering the tower. a. 12 kg/s b. 14 kg/s c. 16 kg/s d. 18 kg/s
3)A)What is radiation in Heat Transfer ? B)Does the radiation affect the lifetime of the turbine? C)How does the radiation affect the lifetime of the turbine?
A power plant with a nominal rating of 1kW does not actually produce 1kW continuously because its capacity factor C - the fraction of the time that it is actually running at its rated power - is less than 100%. If the capacity factor C = 35%, how much energy will be generated by this power plant over 1 year in MJ?
How do heat transfer and energy transformation affect heat engines in electricity production?
20.The following performance of gas turbine engine: compressor inlet temperature, 525°R; compressor isentropic discharge temperature, 673°R; actual compressor discharge temperature, 693°R; turbine inlet temperature, 1505°R; turbine isentropic discharge temperature, 1185°R; and turbine actual discharge temperature, 1218°R. For these conditions calculate the turbine isentropic efficiency.A. 83.24% B. 89.68% C. 87.24% D. 92.68%
An old gas turbine has an efficiency of 21 percent and develops a power output of 6000 kW. Determine the fuel consumption rate of this gas turbine, in L/min, if the fuel has a heating value of 42,000 kJ/kg and a density of 0.8 g/cm3 .
A steam turbine is supplied with steam at 20.6 bar and 399°C. After the steam has expanded to 4.04 bar, it is reheated to 315.5°C and then expands down to a pressure of 0.065 bar. The efficiency of each expansion may take as 75%. 1. Determine the thermal efficiency, in percentile (%), of the cycle. 2. Determine the mass of steam required in kg per kW·hr.
16. (a) Use energy-flow diagrams to show that the existence of a perfect heat engine would permit the construction of a perfect refrigerator, thus violating the Clausius statement of the second law. (b) Explain your answer briefly.
The displacement volume of an internal combustion engine is 2.15 liters. The processes within each cylinder of the engine are modeled as an air-standard Diesel cycle with a cutoff ratio of 2.5. The state of the air at the beginning of compression is fixed by p1 = 1.6 bar, T1 = 325 K and V1 = 2.36 liters. If the cycle is executed 2100 times per min, determine:d) the power developed by the engine, in kW,e) and the thermal efficiency.
A gas within a piston-cylinder assembly executes a Carnot power cycle during which the isothermal expansion occurs at TH = 500 K and the isothermal compression occurs at TC = 290 K. Determine: (a) the thermal efficiency. (b) the percent change in thermal efficiency if TH increases by 5% while TC remains the same. (c) the percent change in thermal efficiency if TC decreases by 5% while TH remains the same. (d) the percent change in thermal efficiency if TH increases by 5% and TC decreases by 5%.
Identify valid processes as those that satisfy both the first and second laws of thermodynamics.