how much does it cost a warehouse to run 80 x 250 watt high pressure sodium lights?
for 125 hours a week ?????
Simplest method is following:
80 * 250 = 20’000 watts per hour
20’000 * 125 = 2’500’000 watts per week or
2.5 Mwt per week
Reserve (starting and extra hours limit consumption) = +5%
2.5* 1.05 = 2.625 Mwt per week
Repairs/spare parts/service= X
Credit cost = i
Investments divided by weeks till full depreciation (cost of equipment/installation) = Y/t
Depreciation per week = D
Total cost = X + 2.625 * c + Y*i/t + D
c – cost of one MegaWatt from your local energy supplyer
Answer: Total cost = X + 2.625 * c + Y*i/t + D
More complex evaluation could include NPV tools and opportunity costs.
100 watt high pressure sodium (Schreder opalo 1230 v,)
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