Anonymous User
  Monday, 31 May 2021
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Question 1:

An energy audit is conducted in a cookstove manufacturing factory in Mbale. The energy auditor has recommended the plant owner to change its existing welding machine with a new energy efficient machine that will save around $15,000 annually. The market price of new machine is $47,000 and its operation and maintenance cost are $100 per month. The life the new machine is 15 years. Calculate the payback period of this investment? Would you recommend the plant owner to change its existing welding machine with the new welding machine?

Question 2:

The thermal efficiency of a stove “A” is 11%. The stove consumes 4.3 tonnes of wood fuel per year, in a household, to meet their yearly cooking needs. This stove is now replaced with another stove “B”, having a thermal efficiency of 34%. Calculate the quantity of wood fuel saved per year by the household. Further, if cost of wood fuel is $0.25 / kg, calculate the money saved by the household while switching from stove A to stove B over a period of 18 months.
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