Term
| how should you design a SECS wrt demand over a year, and why? |
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Definition
-design the SECS to satisfy 100% of demand in the best conditions (use auxilary to supplement at other times)
-because if you design it to meet 100% of demand in winter, you'll be oversized the rest of the year and that doesn't do you any good, it just costs extra |
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Term
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Definition
| percentage of a system's annual (or monthly) energy requirements that can be met by a SECS |
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Term
| solar fraction eqn (annual) |
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Definition
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SS = (cost of conv. energy) - (cost of solar energy)
sum of cash flows for a given year |
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Definition
| extra costs besides the energy system itself |
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Term
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Definition
| SS = FS - (incr. mortgage pymt) -(incr. maintenance pymt) - (incr. parasitic energy costs) - (incr. prop tax) + (income tax savings) + RFCs |
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Definition
| renewable energy certificates: use free market mechanism to promote renewable energy |
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Definition
| min ownership + operations cost over the lifetime of the system |
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Definition
| sum of costs over lifetime |
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Term
life cycle savings (LCS) or
net present worth (NPW) |
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Definition
cumulative SS, valued in today's dollars (total PW) for the life cycle period
DELTA(LCC of conv. fuel systems) - (LCC of SECS + aux) |
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Definition
| annual payment required to cover funds borrowed to install system |
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Definition
| most probably wavelength for a given temperature |
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Term
| to make a cost effective system, you must |
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Definition
| base the system on the client's demand (client's annual load and local electric rate) |
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Term
| present worth factor (PWF) eqn |
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Definition
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Term
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Definition
| time when fuel savings equals initial investment |
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Term
| non-discounted fuel savings in year j |
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Definition
FS = F*L*C_F1(1+i_F)^(j-1)
where F*L = neergy saved by using solar
C_F1 = fuel cost in year one |
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Definition
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Definition
| absorbed solar energy and useful solar energy to do work |
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| energy demanded from system but rejected as not being able to do work |
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| energy demaded from system and used to do work |
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| value of cash flows in today's dollars |
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Term
| what is the prupose of doing a life cycle analysis (LCA)? |
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Definition
-for the clients, to evaluate the comparative value of an energy system
-cost of a system is dependent on the location
-shows initial costs, variable costs, fuel ssavings |
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