4. Dr. Crazy needs to summarize the analyses of two modification possibilities (reheat vs. regenerative), including the cost analysis, so that the City of Wonderland can make a final decision. City of Wonderland buys coals for fuel at the price of $42 per 1000 kg. The energy density of this coal is 30 MJ/kg. City sells the electricity to the household at the price of 15 cents per kWh. (1) In the original outdated cycle, determine; (5 pts.) (a) Total expense for purchasing coal for a year (based on Qin) (b) Total income for selling the electricity to the households for a year (based on Wnet) (c) The profit in $, which the City makes for a year, simply the difference between (b) and (a). (2) In the modified reheat cycle at the optimized condition (max. thermal efficiency), determine: (5 pts.) (a) Total expense for purchasing coal for a year (based on Oin) (b) Total income for selling the electricity to the households for a year (based on Wnet) (c) The profit in $, which the City makes for a year, simply the difference between (b) and (a). (3) In the modified regenerative cycle at the optimized condition (max. thermal efficiency), determine: (5 pts.) (a) Total expense for purchasing coal for a year (based on lin) (b) Total income for selling the electricity to the households for a year (based on Wnet) (c) The profit in $, which the City makes for a year, simply the difference between (b) and (4) Now, you are the Mayor of the City of Wonderland, (5 pts.) (a) Purely based on economic perspective, which modification do you need to choose (reheat vs regenerative)? Provide a reason of the choice briefly (one paragraph). (b) Purely based on environmental perspective (CO2 emission related with climate change), which modification do you need to choose (reheat vs regenerative)? Provide a reason of the choice briefly (one paragraph). 4. Dr. Crazy needs to summarize the analyses of two modification possibilities (reheat vs. regenerative), including the cost analysis, so that the City of Wonderland can make a final decision. City of Wonderland buys coals for fuel at the price of $42 per 1000 kg. The energy density of this coal is 30 MJ/kg. City sells the electricity to the household at the price of 15 cents per kWh. (1) In the original outdated cycle, determine; (5 pts.) (a) Total expense for purchasing coal for a year (based on Qin) (b) Total income for selling the electricity to the households for a year (based on Wnet) (c) The profit in $, which the City makes for a year, simply the difference between (b) and (a). (2) In the modified reheat cycle at the optimized condition (max. thermal efficiency), determine: (5 pts.) (a) Total expense for purchasing coal for a year (based on Oin) (b) Total income for selling the electricity to the households for a year (based on Wnet) (c) The profit in $, which the City makes for a year, simply the difference between (b) and (a). (3) In the modified regenerative cycle at the optimized condition (max. thermal efficiency), determine: (5 pts.) (a) Total expense for purchasing coal for a year (based on lin) (b) Total income for selling the electricity to the households for a year (based on Wnet) (c) The profit in $, which the City makes for a year, simply the difference between (b) and (4) Now, you are the Mayor of the City of Wonderland, (5 pts.) (a) Purely based on economic perspective, which modification do you need to choose (reheat vs regenerative)? Provide a reason of the choice briefly (one paragraph). (b) Purely based on environmental perspective (CO2 emission related with climate change), which modification do you need to choose (reheat vs regenerative)? Provide a reason of the choice briefly (one paragraph)