Jim
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You are right. The HSPF is sensitive to climate. For residential unit (which is under 5 ton), the rated HSPF is based on the climate in Region IV. So it will not guarantee the same performance in other regions.
You can use the catalog data to calculate the local HSPF (the HSPF in region V in your case). Based on your calculation, you can choose the right equipment for you application.
Solomon
To: EnergyPlus_Support@xxxxxxxxxxxxxxx; bldg-sim-bounces@xxxxxxxxxxxxxxxxxxxxx
From: jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx
Date: Sun, 22 Sep 2013 12:29:39 -0500
Subject: [EnergyPlus_Support] HSPF in various climate zones
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To: EnergyPlus_Support@xxxxxxxxxxxxxxx; bldg-sim-bounces@xxxxxxxxxxxxxxxxxxxxx
From: jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx
Date: Sun, 22 Sep 2013 12:29:39 -0500
Subject: [EnergyPlus_Support] HSPF in various climate zones
Dear modeling communities,
We're busy trying to reach ASHRAE 90.1-specified HSPF values for a project that requires heat pumps in the baseline energy model and have constructed the calculation procedure in Excel (at least we think we have!)
It appears to be the case that reaching a specific HSPF value is dramatically more difficult in climate Zone V (where I live) than in Climate Zone II - due to heat pumps performing better in warmer climate regions.
Nonetheless, ASHRAE 90.1 makes no distinction for the required HSPF by climate zone
I'm not even sure that a heat pump is commercially available with HSPF of 7.7 for Climate Zone V! Have any of you investigated this? Have you found this to be true? Have you modeled HSPF for climate zone V and seen favorable savings for alternative systems?
The Building Performance Team
James V. Dirkes II, P.E., BEMP , LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
We're busy trying to reach ASHRAE 90.1-specified HSPF values for a project that requires heat pumps in the baseline energy model and have constructed the calculation procedure in Excel (at least we think we have!)
It appears to be the case that reaching a specific HSPF value is dramatically more difficult in climate Zone V (where I live) than in Climate Zone II - due to heat pumps performing better in warmer climate regions.
Nonetheless, ASHRAE 90.1 makes no distinction for the required HSPF by climate zone
I'm not even sure that a heat pump is commercially available with HSPF of 7.7 for Climate Zone V! Have any of you investigated this? Have you found this to be true? Have you modeled HSPF for climate zone V and seen favorable savings for alternative systems?
The Building Performance Team
James V. Dirkes II, P.E., BEMP , LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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