Battery pack needs cooling as well as heating during cold start condition.  For the HEV/PHEV, the engine heat can be used to heat the battery when vehicle starts.  There is no engine in battery EVs, how do we heat the battery initially before battery can heat itself (self heating)?  How is the battery heating source for current production EV, such as Nissan Leaf and Tesla Model S?

Q: Why does the rate of heat release make a peak at the beginning of the Diesel combustion and drop?

A: During the combustion phase in Diesel Engine, air is compressed in the cylinder and into this…

Q: Provide a statement of sustainability criteria for a hydrogen car charger at a university campus

A: A sustainable hydrogen car charger at a university campus should meet the following criteria: Use…

Q: In the cooling curve shown, the heat of fusion would be used to calculate the energy released in the…

A:

Q: Sketch the P-V diagram of the Internal Combustion Engine showing the ideal cycles of a Diesel…

A: Fuel is consumed in the Diesel cycle to heat compressed air, which causes the piston to rise in…

Q: There is no engine in battery EVs, how do we heat the battery initially before battery can heat…

A: Electric vehicle: The electric vehicle has no engine so it runs with the help of a motor powered by…

Q: In your own words, differentiate diesel engine from gasoline engine.

A: Both gasoline and petrol engines are internal combustion engines used very widely for road…

Q: What are the advantages and disadvantages of diesel and gasoline engine as a source of power?

A: Diesel Engine:- It is an engine in which heat of compressed air is used to burn the fuel. Diesel is…

Q: Solar renewable energy plant has 32 solar panel with 48 KW each. What is the solar KW rated output?…

A: Number of solar panels, n= 32 Power output produced by each panel, P= 48 kW   To find: Solar kW…

Q: For combined cycle, which statement is incorrect Select one O a Heat utilization in combustor isn't…

A: e. The temperature difference between exhaust gad and steam through the waste heat boiler isnt…

Q: 24. The heat engine shown below is consistent with the 2nd law of thermodynamic. * Thermal energy…

A: 2nd Law of thermodynamics As per Kelvin Planck statement " It is impossible to construct a heat…

Q: With a neat diagram indicating all the parts, explain the working of the diesel power plant (Any…

A:

Q: In a heat engine cycle, which of the following process occurs O a. heat is transferred from a…

A: option b is correct

Q: Explain the working principle of photovoltaic solar cell with flow diagram of conversion of a solar…

A: A solar cell is a device that is used to convert light energy to electrical energy with the help of…

Q: Which statement is right regarding the following heat pump? Outside air Inside air Condenser…

A: Option (a)  it heats the indoor space by using heat rejection process.

Q: Describe how a fuel-cell-powered vehicle works.

A: A fuel-cell-powered vehicle, also known as a fuel cell electric vehicle (FCEV), operates using a…

Q: Which of the following are correct and valid for the Clacius statement? □ a. Any b. Clausius Oc. It…

A: Heat pump: It is a device which is used to absorb heat from the outside atmosphere and supply to the…

Q: 10. A winter air conditioning system maintains a building at 21oC and 40% RH. The outdoor conditions…

A:

Q: define Fuel conversion efficiency in the context of an ICE hybrid engine then in the context of a…

A: Fuel conversion efficiency : It is ratio between the useful mechanical work done by the engine to…

Q: If a heat engine produces network output by exchanging heat with only one reservoir, then the heat…

A: It will be PMM2.

Q: Which of the energy flows shown flows out or into the environment?

A: Exergy indicates the amount of useful work that can be extracted from a system. The useful part of…

Q: How we find the Air to Fuel ratio of Diesel Engine using Single Cylinder Diesel Engine Test Bed with…

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A: Given : D = 4 inch d = 2.5 inch Q = 8 gpm = 30.8 in3/sec P = 2000 psi To find : extension,…

Q: The fuel cell has moving parts.

A: The fuel cell has ________ moving parts. Answer: No

Q: Which of the following statement is wrong for the disadvantages of fossil fuels? produces acid rain…

A: Fossil fuels are made from the decomposing of the animals and plants in the earth crust.

Q: Draw P-V and T-s diagram showing the 4 points of different cycle for (a) spark ignition with…

A:

Q: In two cities, the first one has mostly a very hot and clouded weather but the second city has…

A:

Q: n Automotive Engineering company has a task to setup a odel. The engine has four-cylinder,…

A: Four-cylinder, Four-stroke Displacement Volume, Vs = 3 Litres =3 × 10-3 m3 Compression Ratio, r = 17…

Q: Discuss the benefits offered by turbo engines detailing the reasons why the cannot be used on motor…

A: Engine: It is a device which is used to convert chemical energy of fuel into heat energy through the…

Q: A camot engine receives 130 Btu of heat from a hot reservoir at 700 °F and rejects 49 Btu of heat.…

A:

Q: Battery. Assume a home for a stand alone PV Solar system has a 3kwh/day average DC requirement. What…

A:

Q: The generator efficiency of a diesel fuel power plant is 98% with engine generator rating of 0.212…

A:

Q: 6. What do you understand by the auto-ignition temperature? How it is important for the SI and Cl…

A: IC engines are run by fuel. Fuel has some properties which are required to initiate the process. One…

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A: Oman tops the list of countries that have the highest solar densities in the world. In the coming…

Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.