A steam engine develops $65$ Bhp and has an entrance steam condition of

thermal and exhaust at $1\mathrm{.}5$ kpa $..$ Steam consumption is $746\mathrm{.}36k\frac{g}{h}r.$ calculate the

thermal efficiency$(\%)$ of equivalent Rankine engine.

A steam boiler generating $8k\frac{g}{s}$ of $4\mathrm{.}137$kpa,$426\mathrm{.}7C$ steam is continuously

viown at the rate of $0\mathrm{.}49k\frac{g}{s}.$ Feedwater enters the economizer at $148\mathrm{.}9C.$ The furnace burns $0\mathrm{.}7k\frac{g}{s}$

of $35422K\frac{J}{k}g$ heating value. Calculate the overall thermal efficiency of the boiler.

i$.$ A certain geothermal power plant shows that $1,700,000k\frac{g}{h}r$ of pressurized

ground water is available at $17\mathrm{.}5$ MPa and $330C.$ The water will be throttled to a pressure of $1\mathrm{.}733$ MPa

to produce wet steam and this mixture will be passed through a water separator to remove the water

droplets so that saturated steam at $1\mathrm{.}733$ MPa is available at the entrance of the turbine. Other data

are as follows: discharge pressure of turbine $=85$kpa vac; turbine efficiency $=73\%$; mechanical loss $=2\%$

of shaft power; generator efficiency $=95\%.$ Determine the mass flow rate of steam entering the

turbine.

In a $59,250kW$ geothermal power plant, the mass flow of steam entering

tne turbine is $55k\frac{g}{s}.$ The quality after throttling is $28\%.$ Determine the ground water temperature if

the overall efficiency of the plant is $89\%.$

i$.$ The throttling quality of geothermal plant is $18\%$ extracting $50k\frac{g}{s}$

generating a turbine output of $5$ MW $.$ The enthalpy entering the turbine is $2420K\frac{J}{k}g.$ If the cooling

medium has flow rate of $35k\frac{g}{s}$ with temperatures entering and leaving of $27C$ and $39C$

respectively, determine its outlet enthalpy in Btu$/$lb$.$

Al $24\mathrm{.}5$ kg of steam per second at $5\mathrm{.}244$ MPa and $415C$ is produced by a

steam generator. The feedwater enters the economizer at $145C$ and leaves at $205C.$ The steam

leaves the boiler drum with a quality of $98\%.$ The unit consumes $2\mathrm{.}75$ kg of coal per second as received

having a heating value of $30000K\frac{J}{k}g.$ What would be the overall efficiency of the unit in percent?