[Equest-users] Question regarding fuel use

Bishop, Bill bbishop at pathfinder-ea.com
Fri Jun 26 06:20:18 PDT 2015


Chris,
One thing you can check to help make sense of the conversions is the Fuel Meter Properties screen for your liquid fuel.
It shows the thermal value used in the model. For example, the default for diesel is 138,700 Btu/gallon, as shown in the screen shot below.

[cid:image003.png at 01D0AFF1.50704AE0]

Also, compare the PS-E report to BEPS. The quantities should match and you have the additional metric of EUI in KBTU/SQFT-YR based on the conditioned area shown elsewhere in the reports such as on LS-C. This shows you that MBTU on PS-E and BEPS is MMBTU or million BTU versus KBTU which is thousand BTU.

Hope that helps. Have a great weekend!
~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

[cid:image005.jpg at 01D0AFF1.50704AE0]  [cid:image007.jpg at 01D0AFF1.50704AE0]



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From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Chris Baker
Sent: Thursday, June 25, 2015 9:34 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Question regarding fuel use

My PS-F reports for fuel use is in Gallons with peak demand in Gallons/Minute.

My PS-E reports for fuel use is in MBTU with peak demand in MBTU/Hr.

The dropdown menus in the LEED online forms don't give you the option to input fuel capacities in Gallons or MBTU.  Hence my confusion.

For LEED online
My units of energy = kbtu
My units of demand = MBH

SO the conversions need to be done as follows for entry to leed online...

fuel use:  5893.5 MBTU - kbtu
The conversion for demand:  2.0 MBTU/HR - MBH

At first I thought 1 MBTU = 1 million BTU's ??

But looking at my summary reports I see the MBTU fuel use at 5.8935 on the graph, then it sais: (x000,000,000)

This implies that 1 MBTU = 1 Billion BTU's but I'm not sure if this is correct?

Plus, my brain hurts.

Chris Baker
CCI CAD Drafter


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