Medupi steam boiler plant situated in Limpopo provides power in the Lephalale area. The steam boiler plant consists of an economiser, evaporator, and superheater. In order to supply power generation at the mining and residential areas, it requires fuel energy to heat feed water. At 300C, a boiler can generate 5.2kg of steam per kg of fuel. The feedwater is supplied at a pressure of 4.2MPa, at a temperature of 38C, and leaves the economiser at a temperature of 137C to enter the evaporator. Steam with a dryness fraction of 0.89 exits the evaporator and enters the superheater. Fuel used has a calorific value of 32000kJ/kg. Considering no pressure loss inside the boiler. Determine: 2.1. The efficiency of the boiler. 2.2. Fraction of heat given to steam in the economiser. 2.3. Fraction of heat given to steam in the evaporator. 2.4. Fraction of heat given to steam in the superheater. (5) Medupi steam boiler plant situated in Limpopo provides power in the Lephalale area. The steam boiler plant consists of an economiser, evaporator, and superheater. In order to supply power generation at the mining and residential areas, it requires fuel energy to heat feed water. At 300C, a boiler can generate 5.2kg of steam per kg of fuel. The feedwater is supplied at a pressure of 4.2MPa, at a temperature of 38C, and leaves the economiser at a temperature of 137C to enter the evaporator. Steam with a dryness fraction of 0.89 exits the evaporator and enters the superheater. Fuel used has a calorific value of 32000kJ/kg. Considering no pressure loss inside the boiler. Determine: 2.1. The efficiency of the boiler. 2.2. Fraction of heat given to steam in the economiser. 2.3. Fraction of heat given to steam in the evaporator. 2.4. Fraction of heat given to steam in the superheater