What is meant by life-cycle cost and why is it important in evaluating a solar system?
What will be an ideal response?
Life-cycle costs include all expenses over the expected life of a system. By using life-cycle costs, the system can be compared with alternatives including conventional systems. The initial cost of solar energy systems is usually higher, but may have lower operating costs and have almost no energy cost.
You might also like to view...
In 2007 the world’s population was estimated to be 6.7 billion people. The UN forecasts the population will begin to level off at 9.2 billion people in 2050. What is the population growth rate in percent over this period of time?
What will be an ideal response?
It is better to walk the calf for a short period of time daily instead of long periods of time every few days.
Answer the following statement true (T) or false (F)
What would happen if metal debris fell into the heating element?
A) It is not possible for debris to fall into a heating element. B) The debris could cause the heating element to turn on. C) The debris would do nothing. D) The debris could cause the heating element to fail and never turn on.
The P&ID symbol 
indicates that this instrument is ____________________ and ______________________________.
Fill in the blank(s) with the appropriate word(s).