I have modeled a proposed building including PV and solar thermal systems. The energy generated of PV system is excluded of End Uses results, but the energy generateds of Solar thermal is integrated in DHW system and it is subtracted of DHW energy consumption. So, I include only PV energy generated in Table L-1 of LEED Template, i don´t include the energy generated by Solar Thermal. However i include PV and Solar thermal energy in LEED Templated of EAc2. Is the right approach? Secondly, the reviewer request me to justify calculations of renewable energy generation. The calculations are based in Energy simulation results (Energy Plus). My answer must be that renewable generation is based on Energy Simulation? and inform you thet see the results of renewable energy generated in Annual Building Utility Performance Summary (Energy Plus)? Is the right approach? Thanks!!

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Thu, 07/21/2016 - 21:09

That will probably work. Technically you should include both the solar thermal and PV in the renewable energy table on the form. If the only savings for service hot water is the solar system then it should be straight forward and not necessary to enter the savings in Table L-1. However, if you have any additional service hot water savings, like hot water demand reduction or back up system efficiency, then it is helpful to the reviewer to separate these so they can see the amount of savings associated with each. I would include a narrative explaining the breakdown of the savings if it is more than just the solar thermal system. You should provide additional information on how the savings were calculated. If generated by the modeling software provide reports showing the inputs (could be screen captures) and outputs along with an explanation of the calculations.

VICTOR MORENO

Green Building Energy Consultant

Green Living Projects

LEEDuser Basic Member

2 thumbs up

Fri, 07/22/2016 - 07:24

ThankS Marcus. I´m sorry for posting the same question in different forum. i was handling mobile device and the question don´t displayed as posted. Sorry. I point option "Automatic Cost Calculation: Renewable energy cost savings will be based on the "virtual" energy rate defined in Section 1.5." on SECTION 1.8 - ON-SITE RENEWABLE ENERGY of the LEED Template. So, the renewable energy generated is subtracted of Facility Energy consumption. If I included the solar thermal energy in Table L-1, this salved energy is count twice. Therefore I think that i have to include only PV energy in Table L-1. Is the right approach? Secondly, to included the total energy consumption of the Proposed building in EAc2 LEED Template, I have to add the Solar thermal energy generated to End use result of Energy Plus? Because the End use of simulation result include the saving of Soler thermal Energy. Thanks in advanced!!!

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Sat, 07/23/2016 - 17:14

That approach should work just make sure to explain to the reviewer that the solar thermal is included in the Proposed modeling results. You are correct that you do not want to count it twice.

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