[Equest-users] Outdoor swimming pool and heater

[Rehana Jiffrey]

Thanks all. Ideas were helpful.
Now trying to figure out how much energy energy can be saved if a pool
cover is installed. It is possible to model this in equest?.

Rehana.

On Mon, Mar 28, 2016 at 8:18 PM, Jayant Patil <jppatil at gmail.com> wrote:

> I use the methodology described in the below link. It is pretty much close
> to the ASHARE  method and EPA's energy star performance rating technical
> document.
>
>
> http://www.rlmartin.com/rspec/whatis/studies_outdoor_inactive.htm
>
> Jay
>
>
>
> On Mon, Mar 28, 2016 at 9:14 AM, Elizabeth Gillmor <
> elizabeth at energetics-eng.com> wrote:
>
>> I use bin calcs for this, though I am interested to hear if others have a
>> better way.  Total load = losses from evaporation + radiation +
>> convection.  Use 8760 data from your weather file to get OA DB, humidity,
>> solar radiation, wind speed etc.  Useful paper with equations here:
>> http://www.mmshah.org/publications/ASHRAE%202014%20Evaporation%20paper.pdf
>>
>> From my bin calcs I get a total annual load in Mbtu/year, then convert
>> that to Mbtu/hr for the days that the pool is open (which averages the load
>> across its operating period), and model that as a process load on a boiler
>> loop with an on/off schedule ("on" during the open season).  It's a
>> relatively OK estimate for a fuel rate that doesn't have a demand charge,
>> but might not be the best way for your electric pool heater if you have a
>> demand charge on your rate.
>>
>> *Elizabeth Gillmor  PE, BEMP, LC, LEED AP*
>>
>> *e n e r g e t i c s  **consulting engineers, llc*
>> energetics-eng.com | 303.619.0091
>>
>> On Mon, Mar 28, 2016 at 9:42 AM, Christian Kaltreider <
>> ckaltreider at sudassociates.com> wrote:
>>
>>> Rehana,
>>>
>>>
>>>
>>> Estimating the energy consumption of a pool heater can be very tricky.
>>> The dominant mode of heat loss is generally evaporation.  Some major
>>> influences include activity level of people using the pool
>>> (splashing/stirring increases evaporation), wind speeds, and the use of a
>>> pool cover.  The US DOE has some material on the subject:
>>> http://energy.gov/energysaver/gas-swimming-pool-heaters  There is a
>>> table on this page which I have used to back calculate and extrapolate
>>> heating requirements for a specific project as a sanity check.
>>>
>>>
>>>
>>> Also, ASHRAE HVAC Applications 2015 addresses pool heat loss starting on
>>> page 5.6.  The discussion is helpful and provides sound calculation
>>> methods, but they are more easily applied to indoor pools than outdoor
>>> pools.
>>>
>>>
>>>
>>> That’s all I have at the moment; hopefully you can find some additional
>>> resources.
>>>
>>>
>>>
>>> Good luck,
>>>
>>> Christian
>>>
>>>
>>>
>>> *From:* Equest-users [mailto:equest-users-bounces at lists.onebuilding.org]
>>> *On Behalf Of *Sunayana Jain
>>> *Sent:* Monday, March 28, 2016 8:23 AM
>>> *To:* Rehana Jiffrey; equest-users at lists.onebuilding.org
>>> *Subject:* Re: [Equest-users] Outdoor swimming pool and heater
>>>
>>>
>>>
>>> Rehana,
>>>
>>>
>>>
>>> You can model pool heater load on electric meter (see image below) with
>>> winter months schedule:
>>>
>>>
>>>
>>>
>>>
>>> Thanks,
>>>
>>>
>>>
>>> *Sunayana Jain CEM, LEED AP BD+C*
>>>
>>> *From:* Equest-users [mailto:equest-users-bounces at lists.onebuilding.org]
>>> *On Behalf Of *Rehana Jiffrey
>>> *Sent:* Saturday, March 26, 2016 11:21 AM
>>> *To:* equest-users at lists.onebuilding.org
>>> *Subject:* [Equest-users] Outdoor swimming pool and heater
>>>
>>>
>>>
>>> Dear All,
>>>
>>> I'm trying to model an outdoor swimming pool located at the roof top of
>>> a residential building. Pool heater (45Kw) operates from December to March
>>> (4 months).
>>>
>>> I was wondering if anyone could help me how to model this scenario, and
>>> where to input these consumption values.
>>>
>>> FYI, this is my first time modeling an outdoor pool and pool heater.
>>>
>>> Thank you,
>>>
>>> Rehana.
>>>
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>>
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>
>
> --
>
> ************************************************************************************************
> "I'd put my money on the sun and solar energy. What a source of power!
> I hope we don't have to wait till oil and coal run out before we tackle
> that."
> - Thomas Edison (1847-1931)
>
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