wk 6

Who invented the diesel engine?

Ignition occurs due to heat generated by compression of air causing ignition, thus burning fuel, and expand as the piston recedes on working stroke, converting heat into work

whose objective was a “rational heat engine”

It is the total distance travelled by each piston in one minute

It is the ratio of actual volume of air drawn at intake temperature and pressure, induced and compressed, to the displacement volume.

Referring to engine cylinder, indicated power is the power developed in the cylinder.

It is the power delivered by the shaft at the output end.

Due to friction losses Pmb is always less than Pmi .

It is the ratio of the brake power, to the indicated power

It is the power dissipated in an engine due to friction losses.

It is the ratio of the generator power, to the brake power

It is the ratio of the work done by heat engine to the heat supplied by the fuel, HHV

the ratio of the indicated power, to the heat supplied by the fuel

the ratio of the brake power, to the heat supplied by the fuel

It is the ratio of the thermal efficiencies, to ideal thermal efficiency

It is the ratio of the indicated thermal efficiency, to cycle efficiency

It is the ratio of the brake thermal efficiency, to cycle efficiency

has the advantages such as: cost of excavation is avoided; leakage is readily detected; maintenance is easier; water and sediments are easily drained

has the following advantages: oil can be delivered by gravity; fire hazard is reduced; and plant ground more easily landscaped.

Diesel engine needs of air per minute per hp developed

is required between engine and air intake

Exhaust system may carry m3/min of gases per hp developed

consist of frame filled with metal shavings, coated with special oil which would seize and hold dust particles carried by air. It requires removing, cleaning and re-oiling.

air is swept to oil pool, coating the air particles and trapped in the air filter

is made of cloth, felt, glass wool, etc. which catches dirt.

the working medium is primarily a permanent gas, such as combustion or flue gases

process in which gas turbines operates in two isentropic and two isobaric process, for ideal cycle.

is a heat exchanger which recovers waste heat from the cycle and transfers it to the fluid at a point where the pressure is higher and the temperature is lower

is a heat exchanger which removes heat from the working medium between stages of compression, thereby giving an approximation to isothermal compression

is a heat exchanger which removes heat from the working medium prior to first stage of compression

used to cool the exhaust gases in a closed or semiclosed cycle

is the general term for the thermal component in which heat is added to the working medium.

is the term used, when the heater is used to increase the temperature between expansion stages to approximate isothermal expansion

is a patented device combining expansion and compression functions in a single rotor permitting high cycle temperatures.

is one in which all the working medium follows a single path through the entire cycle

is one in which the medium follows a divided path through some of the cycle

is one when all rotors are coupled together on a common axis and rotate with fixed speed relationships

when the rotors lie on more than one rotational axis.

if no fixed speed relationship exists between several shafts, all except the power coupling shaft

Temperatures of the gas entering the expander is

Exhaust temperature is

The exhaust flowrate in modern heavy duty turbines per 100 MW is approximately

the turbine power is used to drive the high efficiency compressor.

method of graphin water flow in the stream

1 acr ft to cubic ft

sg of oil

Cp of water