[Bldg-sim] WLHP primary secondary loop

[Karen Walkerman]

I would like to specify a heat exchanger efficiency between the ground loop
and the heat pump loop.  I have found a work-around in that I can use
"Supply Loss DT" instead.

Thanks,

~karen~


On 5/8/08, Aulbach, John <jaulbach at nexant.com> wrote:
>
>  Karin:
>
> What would be the purpose of two loops?
>
>  John R. Aulbach, PE, CEM
> *Project Manager*
> Nexant, Inc.
> 701 West Kimberly Ave., Suite 245
> Placentia, CA 92870-6342 USA
> Phone: 714-524-4402
> Fax: 714-524-4407
> email: jaulbach at nexant.com
>
>
>  ------------------------------
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Karen Walkerman
> *Sent:* Thursday, May 08, 2008 4:01 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] WLHP primary secondary loop
>
>
>  Hi All,
>
> Does anyone have experience setting up a primary/secondary loop with WLHP
> loops?  Is this possible?
>
> Thanks,
>
> ~karen~
>
>
>
> On Wed, May 7, 2008 at 3:09 PM, Kevin Warren <kevin at warren-energy.com>
> wrote:
>
>> We looked at balance temperature in my Master's Thesis at the UW-Madison
>> Solar Lab back in 1992. It was sponsored by the Wisconsin Center for
>> Demand
>> Side Research (now the Energy Center of Wisconsin). Balance temperature
>> was
>> not the main focus of our research, but we examined interval gas
>> consumption
>> for a sample of about 100 homes - all from a Midwestern city. The data was
>> on a 5-minute basis. I can't recall how the sample was determined, so I'm
>> unsure how representative was the mix of homes. They were from a variety
>> of
>> sizes, but it looks like most of them were built in the 80s, so they were
>> newish homes at the time. The average balance temp was about 65F. I'm not
>> sure the spread around that mean.
>>
>> Kevin Warren, P.E., CEM, LEED AP
>> Warren Energy Engineering, LLC
>> (610) 255-3798 ph
>> (610) 255-3406 f
>>
>> -----Original Message-----
>> From: equest-users-bounces at lists.onebuilding.org
>> [mailto:equest-users-bounces at lists.onebuilding.org]On Behalf Of Bishop,
>> Bill
>> Sent: Wednesday, May 07, 2008 9:29 AM
>>
>> To: Abaza Hussein; equest-users at lists.onebuilding.org;
>> bldg-sim at lists.onebuilding.org
>>
>>  Subject: Re: [Equest-users] [Bldg-sim] Balance point temperature for
>> houses
>>
>>
>> Hussein,
>>
>> I'll admit that I didn't even know what the balance point temperature
>> was.  I did some quick internet research and found this resource:
>>
>> http://arch.ced.berkeley.edu/vitalsigns/res/downloads/rp/balance_point/b
>> alance_point_big.pdf
>>
>> There is a lot of information about building heat gains and losses and
>> how degree days are calculated.  It mentions on p.55 that the 65F number
>> was determined in the 1940s, and that newer, better insulated homes have
>> a lower balance point, but it doesn't suggest a number.
>>
>> William Bishop, EIT, LEED(r) AP | Pathfinder Engineers LLP
>> Mechanical Engineer
>>
>> 3300 Monroe Ave., Suite 306
>> Rochester, NY  14618
>> TEL (585) 218-0730 Ext. 114
>> FAX (585) 218-0737
>> bbishop at pathfinderengineers.com
>>
>> www.pathfinderengineers.com
>> -----Original Message-----
>> From: bldg-sim-bounces at lists.onebuilding.org
>> [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Abaza
>> Hussein
>> Sent: Tuesday, May 06, 2008 3:53 PM
>> To: equest-users at lists.onebuilding.org; bldg-sim at lists.onebuilding.org
>> Subject: [Bldg-sim] Balance point temperature for houses
>>
>> Could you please help. Is there any recent data or survey about the
>> balance
>> point temperature of homes in the US. Is the 65F still applicable?
>> I appreciate any input.
>> Dr. H. Abaza
>> ECU
>>
>>
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>
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