![]() ![]() The PV-module entries come straight from the manufacturer's documentation. The results corresponded reasonably well with what the electrical engineer thought we could get out of the system. $Otherwise, it will track the building consumptionįrom Shaun Martin, Vancouver: Here is an abbreviated listing of the entries I used on one project (not LEED). $ Force the inverter to operate at full output all hours. ![]() ![]() The utility has a net-sale arrangement that, on a yearly basis, allows surplus power to be credited toward the power consumed. The building uses a single meter, which is allowed to "run backwards" during periods of surplus power production. Small Commercial Photovoltaic SystemĪ small commercial building has a roof-mounted photovoltaic array. Fixed costs are still charged.ĪLL-COSTS specify that all monthly charges, including fixed charges are dropped whenever the facility is a net power producer for the monthly or yearly interval.Įxample Input. Demand charges are not actually credited, but instead are "forgiven" whenever the facility is a net power producer for the monthly or yearly interval. Specifies that both energy and demand charges will be credited, up to the amount of energy bought. Any demand and/or fixed costs will still be charged. The default, specify that only energy sales will be credited, up to the amount of energy bought. When BUY/SELL-MODE is NET-MONTHLY or NET-YEARLY, specifies the types of credits that will be given for power sold back to the utility: ENERGY-ONLY Instead, depending on the NET-SALE-CREDITS, the utility may waive all yearly costs, including customer charges and and demand charges that accrued during hours the facility was a net power consumer. If, on a yearly basis, the facility is a net producer of power (sells more than it buys), the utility will accept the excess production, but will not pay for it. In other words, the utility will act as a "bank" and will store surplus power for use by the facility, provided the surplus is consumed within the same year it is produced. Specifies that, on a yearly basis, the utility will accept and credit surplus power, up to the amount actually sold to the facility. Instead, depending on the NET-SALE-CREDITS, the utility may waive all monthly costs, including customer charges and demand charges that accrued during hours the facility was a net power consumer. If, on a monthly basis, the facility is a net producer of power (sells more than it buys), the utility will accept the excess production, but will not pay for it, and will not apply it toward future months. In other words, the utility will act as a "bank" and will store surplus power for use by the facility, provided the surplus is consumed within the same month it is produced. Specifies that, on a monthly basis, the utility will accept and credit surplus power, up to the amount actually sold to the facility. Specifies that, while the utility will accept the surplus power, they will not give any credit for it. The default, allows an unlimited amount of surplus power to be sold back to the utlity and credited to the customer. When TYPE = ELECTRICITY, and surplus on-site electric generation may force the meter to "run backwards", specifies the allowable buy/sell arrangement with the utility: BUY/SELL (~2.6 MB)īing Liu, PE, CEM LEED Accredited Professional Pacific Northwest National Lab 902 Battelle Blvd. An example of a small commercial PV system is included in the 2nd to last page (or there about) of the same documentation. The description of PV module parameters is included in the DOE-2.2 Dictionary volume of documentation. Step 3: Under the Utility Rate command, add Buy/Sell command if selling back electricity generated by PV systems to the grid Step 2: Create a corresponding Electric Generator ELEC-GENERATOR on the same section Step 1: Create PV Module under Utility and Rate Section Basically three steps to model a PV array system in eQuest: ![]() Specially thank Scott Criswell for pointing me to the right directions on this simulation skill. I'd like to summarize all the responses and my findings about PV modeling in eQuest. ![]()
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