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Q19) An advanced cold climate air source heat pump (CCASHP) is used to provide space heating of a house in Toronto with an overall seasonal heating coefficient of performance (COP) of 3.0. The house requires a total of 15,000 kWh/year of space heating requirement. Price of electricity is $0.15/kWh and the price of natural gas, including a $170/tonne of CO2 of federal carbon tax by year 2030, is 50.70/m. And each cubic meter of natural gas has 37.8 MJ of energy. (a) Assume the heat pump receives electricity from a natural gas fired combined cycle power plant with overall thermal efficiency of 50%. The carbon intensity of natural gas can be taken as 13.8 g of C/MJ. Assuming continuous operation calculate the actual emissions of CO2 in kilograms and operating cost in dollars. (4 marks) (6) Assume the heat pump receives electricity from a coal fired plant with an overall thermal efficiency of 35%. The carbon intensity of coal can be taken as 24.2 g of C/MJ. Assuming continuous operation calculate the actual emissions of CO2 in kilograms and operating cost in dollars. (4 marks) C) Assume we have a natural gas furnace with 90% efficiency instead of the heat pump to provide the space heating to the house. Assuming continuous operation, calculate the actual emissions of CO2 in kilograms and operating cost in dollars. (4 marks) Which of the three options is better and why? (Make sure you draw an appropriate schematic.) Solution