[Equest-users] Solar Thermal Energy Assisted Cooling

Fri Jun 12 10:17:01 PDT 2020

Hi Nick,

Not solar powered but rather using thermal energy to assist the compressor
in the vapour compression cycle.

Regards

DAMON LAPPING, CEMR, CRMR

Managing Consultant

 <mailto:damon at greenlogik.co.za> damon at greenlogik.co.za

 <http://www.greenlogik.co.za/about.html> www.greenlogik.co.za  

T.    +27 (0) 87 470 0650    F.   +27 (0) 86 763 1323

C.   +27 82 339 3865

UNIDO Certified Energy Management Professional 

AEE CEM (Association of Energy Engineers Certified Energy Manager)

SA Green Building Council Existing Building Performance Accredited 

Professional 

From: Nicholas Caton <Nicholas.Caton at se.com> 
Sent: Friday, 12 June 2020 6:41 PM
To: Damon Lapping <damon at greenlogik.co.za>
Cc: equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Solar Thermal Energy Assisted Cooling

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

Nick Caton, P.E., BEMP

  Senior Energy Engineer

  Energy and Sustainability Services
  Energy Performance Contracting 

D  
M  
E  

913 . 564 . 6361

785 . 410 . 3317

 <mailto:nicholas.caton at se.com> nicholas.caton at se.com

15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219

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

[External email: Use caution with links and attachments]

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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, CEMR

Managing Consultant

 <mailto:damon at greenlogik.co.za> damon at greenlogik.co.za

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T.    +27 (0) 87 470 0650    F.   +27 (0) 86 763 1323

C.   +27 82 339 3865

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AEE CEM (Association of Energy Engineers Certified Energy Manager)

SA Green Building Council Existing Building Performance Accredited 

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