[Equest-users] Solar Thermal Energy Assisted Cooling

[Nicholas Caton]

Hi Damon,

So... a solar-powered refrigerant compressor?

I suppose you could model a small PV array to generate an appropriate kW output profile within eQuest, then just dump that into the building meter with a normal DX-system.  You'll want that airside system to have some deliberately-assigned availability scheduling so that it cannot actively cool when there is insufficient daylight... but otherwise I think you'd define that system normally.  The biggest potential hurdle with that approach might be extrapolating the actual efficiency/performance of the equipment (sans solar contributions) from the manufacturer.

I might sooner use a 3rd party software, purpose built for estimating PV system performance, over eQuest though... eQuest is capable but frankly a bit unwieldy for average joes like me, lacking specialized and deep knowledge of PV technology.  I would avoid it through post-processing if possible, but if you do go a 3rd party PV analysis route and you MUST get that generation into your eQuest model, you can use the library entries for a PV generator alongside an electric sale meter to "back in" a generation profile aligning with your outside analysis.

I hope this is helpful!

~Nick



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From: Equest-users <equest-users-bounces at lists.onebuilding.org> On Behalf Of Damon Lapping via Equest-users
Sent: Friday, June 5, 2020 5:47 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Solar Thermal Energy Assisted Cooling


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Good Day,

Does anyone have experience in modelling solar thermal energy assisted cooling for HVAC? These systems use thermal energy collected from the solar collector and is converted into mechanical work, which is used then used to compress the working fluid in a vapor compression cycle directly. So the HVAC system achieves the required setpoint temperature with less energy required from the compressor than previously required.

I have heard on some online platform that it can be done in equest but can't seem to find that link anymore.

Can anyone help a brother out? :-)

Thanks

Regards

Damon

Regards

DAMON LAPPING, CEM(r)
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