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CS-2009 EAp2:Minimum Energy Performance

Carrier air to water chiller (non standard (ARI) testing)

I would like to check if the Carrier model 30RQ0262 (COPc=2,62 according ARHI test 550/590 despite ASHRAE requires ARI 340/360) will meet that Mandatory Provisions in terms of Equipment Efficiency. after perform hole buidlign simulation, the result using this units is 30% reduction. Additionally we have checked the CIR ID#2305 +ID#10028+ ID#5938 – “Option 1 - Whole Building Simulation, offers the flexibility that the project team requires. Applicable Internationally.” Y “the project is requesting confirmation of non standard (ARI) testing methods for the proposed equipment efficiencies”

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Wed, 05/04/2016 - 15:40

Which table are you looking at in 90.1? I think this air cooled scroll chiller comes under Table 6.8.1C which does reference ARI 550/590.

Fri, 05/06/2016 - 10:27

Thanks Marcus, As this is a heat pump, cooling and heating, (air to water) [http://ahi-carrier.at/wp-content/uploads/2012/pdf/30rq/30RQ_PSD.pdf] in my view it should be considered according table 6.8.1.B in that case, Air Cooled, >70kW, all other, before (1/1/201), the minimum, that’s what I want to check, is 2.58 COPc? Which does reference ARI 340/360 instead of 550/590? Thanks
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 05/06/2016 - 18:35

I don't think this air to water heat pump is actually regulated at all by 90.1. The air cooled heat pump you reference is air to air. If you look at ARI 340/360 I am pretty sure it only covers air to air heat pumps. I would think that Carrier would understand the correct standard to test the equipment under. In my opinion the cooling side is addressed by 6.8.1C and the heating side is simply unregulated so it does not have a specific requirement.

Sat, 05/07/2016 - 22:17

Yes, in fact the ARI 340/360 only covers air to air heat pumps. Since the building occupancy is very low (12%) and the owner wants to upgrade the façade, lighting system, including C02 demand ventilation system, and also to include additional common areas into future tenant space, we have proposed them to pursue LEED CS. According the whole building simulation with the new elements and maintaining the two air to water heat pumps (replaced last May 2015) the overall savings will be about 30%. However we have the minimum energy efficiency mandatory provision 6.8.1C, but these two air to water heat pumps (replaced last May 2015), are “simply unregulated so it does not have a specific requirement.” In my view it will be very unsustainable to replace these two air to water heat pumps, to meet the minimum energy efficiency mandatory provision, even when the Whole Building simulation proves important saving and additionally these heat pumps are unregulated on 90.1. Does it make sense? Shall we maintain these heat pumps? thanks in advance for your apprecaited support
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Mon, 05/09/2016 - 13:21

I think you could use this equipment. You can make the case that this equipment is not regulated by 90.1. When a piece of equipment is not regulated its efficiency is not subject to compliance with the mandatory provision for minimum efficiency.You should provide the reviewer a narrative describing why the minimum efficiency does not apply.

Mon, 05/09/2016 - 14:08

Thanks Marcus, We will do it.

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