$1.$ A subcritical thermal power plant with a heat rate $($H$.$R$)$ of $2700$kca$\frac{l}{k}Wh$ is converted to supercritical power plant with a H$.$R of $1900$kca$\frac{l}{k}Wh.$ Please calculate the percentage $(\%)$ reduction in $C{O}_2$ emission for the same quantity of coal for every unit of electricity generated.

$2.$ A combined cycle has a heat rate of $1800$Kca$\frac{l}{k}Wh.$ Calculate the NG

consumption in $kg$ and $Nm3.$ What is the efficiency of the cycle in percentage? What is the ideal efficiency possible?

$2.$ Given

$1$ MMBTU is one million BTU $($British Thermal Units$)$

$1$BTU$=1\mathrm{.}055kJ,$

$1$kcal$=4\mathrm{.}184kJ.$

Cal Value: $12,500$kca$\frac{l}{k}g$

Find equivalent kilograms of Natural gas for $1$ MMBTU.

$4.$ In the above question $($Ques$.3),$ if the molecular weight of NG is $17\mathrm{.}2k\frac{g}{k}$gmol. then calculate the equivalent $N{m}^3$ of N$.$G for $1$ MMBTU gas. NM$3$ is a normal cubic meter is the gas volume at $0C$ and $1$ bar pressure. Ideal gas then is used to calculate the mols and mass using the expression that $22\mathrm{.}4Nm3$ is $1$kgmol and $1$kgmol is equal to MolW of the gas in $kgs.$