Hi All
We are working in a project located in India which has an evaporative cooler as a cooling system, in the design submission review, the reviewer asked us to model the heating coil to control the humidity and to model the minimum fresh air in baseline case. In real time there is no heating coil present in the building. By now I had doubt that when considering onsite renewable energy whether I should consider the energy consumption including the heating coils, or the energy consumption of proposed design without humidity control (this is actual system installed in the project).
Thanks in Advance
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
May 30, 2018 - 9:44 am
Evaporative cooling is generally not considered an onsite renewable energy source.
Manikandan S
May 31, 2018 - 8:19 am
Hi Marcus
In our preliminary submission for EA prerequisite 2 – Minimum Energy Performance, we have been asked to model the evaporative coolers with Dx coil to control humidity in proposed case in order to compare against the baseline case. So, our proposed case energy consumption increases. But the same shall not happen in actual operation where there is no Dx coil in evaporative cooler system.
But, my query is when calculating an energy offset for renewable energy should I consider the energy consumption of proposed case model with Dx coil or the actual proposed case model with only evaporative cooler?
So kindly help me to solve this issue.
Thanks in Advance
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
May 31, 2018 - 11:14 am
Sorry for my confusion.
Is your proposed model meeting the unmet load hour requirements without the DX coil? If so then we think that the reviewer may not be correct in requiring you to model the DX coil for humidity control. 90.1 does not have any requirements for humidity control.
The best way to address this issue would be to ask for clarification from the reviewer. You can cite section G3.1.2.2 which only requires unmet load hours to address temperature. Also look at the definition of a cooled space to make sure that the system qualifies as a cooled space which allows you to model the baseline as DX and the proposed as designed.