[Equest-users] Question regarding fuel use

[Chris Baker]

Thank you Ari and Bill!

I figured MBTU was million BTU.  The thing that threw me off was that summary report showing 9 zeros!  But that was single digits too which means both translate to 5.8935 billion BTU’s.

Or 5,893.5 MBTU like you say!

See my  attached PSE report for Fuel Meter 1.  It sais..

MBTU                           5893
MAX MBTU/HR           2.0
MON/DY                     1/13
PEAK ENDUSE              2.0
PEAK PCT                      100

So wouldn’t this translate to 2.0 referring to MBTU/HR and not KBTU/HR?

It just doesn’t show the units of demand on BEPS or PS-E reports (just sais “peak enduse”).  But the number (2.0) is the same as max MBTU/HR so I assumed that to be the unit of demand.

I should note that this project is in Alaska so the fuel usage in the baseline is higher than normal.  The models go through -40 to -50 temperatures at one point for heating.

So it definitely puts a big demand on the PSZ systems.

Fortunately, I already had my “fuel meter type” to fuel-oil in both models and my BTU/unit is already good to go also (like Bill showed in his screen capture).

-Chris

From: Greenberg, Ari [mailto:AGreenberg at brplusa.com]
Sent: Friday, June 26, 2015 5:13 AM
To: Chris Baker
Subject: RE: Question regarding fuel use

Hi Chris –

Not sure if anyone responded yet, but I’ll give it a shot:

MBTU is million BTU, so 5893.5 MBTU = 5,893.5 million BTU or 5.8935 billion Btu (hence the graph).  If LEED requires kBtu = 1,000 Btu, divide MBTU by 1,000.
The brain-hurting one is that for demand MBH is kBtu/hr, not MBTU/hr (in this case old latin M = 1,000 thing, not M = million) – not quite sure where you got 2.0 MBTU/HR = MBH, it should be 1 MBtu/hr = 1000 MBH.

By the way, it is possible to choose your own units for your meters in the “Basic Specifications” of the fuel meter window.  The energy and demand “label” numbers correspond to the conversion table in the LV-M report.  For example 64 and 65 are KBTU/HR and KBTU, respectively – you would just have to input the correct Btu/unit (in that case 1,000).

Hope this helps,
Ari




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Ari Greenberg
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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<mailto: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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