[Equest-users] Sea-Water Cooled Chiller Modeling

Tue Aug 15 07:30:31 PDT 2017

Hi Nick,
First of all, I can not assigned Lake/Well heat exchanger on CW loop. I 
can attach Lake/Well heat exchanger on Lake/Well type circulation loop 
and i can assign Lake/well circulation loop as chiller condenser loop. 
We assigned design constant sea water temperature with temperature 
schedule on equest ground loop heat exchanger tab as you can see at the 
attachment.
For example, i tryied this configuration on a simple model that include 
air cooled chillers. We thought that when we changed air cooled chiller 
with sea-water cooled chiller on same simple model, the cooling 
electrical consumption will be decreased. But the cooling consumption 
increased. Did we think mistake?

Thank you for kindly helping
Best Regards
Sefa

14.08.2017 20:03 tarihinde Nicholas Caton yazdı:
>
> Hi Sefa,
>
> Did Chris Jones’s suggestion from a few months ago to try a Lake/Well 
> heat exchanger on the associated  CW not work out?
>
> That would permit you to “force feed” the temperatures seen by the 
> chillers in a direct fashion via temperature scheduling.  Picture 
> follows for clarity.
>
> Please update your query with what you’ve tried and what seems to be 
> not working.  I have another suggestion which may offer some relative 
> simplicity from a custom performance curve development standpoint, but 
> intuitively I also would have tried the Lake/Well approach first to 
> see if that gets the job done.
>
> ~Nick
>
> *Nick Caton, P.E., BEMP*
>
> Senior Energy Engineer
> Regional Energy Engineering Manager
>
> Energy and Sustainability Services
> Schneider Electric
>
> 	
>
> D 913.564.6361
> M 785.410.3317
> F 913.564.6380
> E nicholas.caton at schneider-electric.com 
> <mailto:nicholas.caton at schneider-electric.com>
>
> 	
>
> 15200 Santa Fe Trail Drive
> Suite 204
> Lenexa, KS 66219
> United States
>
> *From:*Equest-users 
> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of 
> *Sefa Sahin via Equest-users
> *Sent:* Monday, August 14, 2017 6:36 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Sea-Water Cooled Chiller Modeling
>
> Our project building is located in Istanbul/Turkey. Cooling will be 
> provided by centralised two chillers. There is not a cooling tower. 
> The project building location is very close the sea and this chillers 
> will be fed by the sea-water condenser system.
> There is a titanium plate type heat exchanger between sea-water and 
> chiller condenser water. Sea water condenser flow and return 
> temperatures 22C(71.6F) and 27C(80.6F).
> Chiller condenser water flow and return temperatures 29C(84.2F) and 
> 23C(73.4F). In addition, condenser total water flow rate is 340 kg/hr 
> at 250 kPa.
> How can sea-water condenser system be modeled in eQuest?
>
> Thank you,
> Best Regards
>
> Sefa Sahin, LEED AP BD+C
> Mimta EcoYapı
> Hekimsuyu Cad. 559. Sk.
> No:39 34255 Küçükköy İstanbul Türkiye
> Tel: 90-212-617-2296
> Fax: 90-212-617-2297
>
> www.eco-yapi.com <http://www.eco-yapi.com/>
>
> www.facebook.com/mimtaecoyapi <http://www.facebook.com/mimtaecoyapi>
>
> www.linkedin.com/company/mimta <http://www.linkedin.com/company/mimta>
>
>
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> ______________________________________________________________________
>

-- 

Sefa Sahin, LEED AP BD+C
Mimta EcoYapı
Hekimsuyu Cad. 559. Sk.
No:39 34255 Küçükköy İstanbul Türkiye
Tel: 90-212-617-2296
Fax: 90-212-617-2297

www.eco-yapi.com <http://www.eco-yapi.com/>

www.facebook.com/mimtaecoyapi <http://www.facebook.com/mimtaecoyapi>

www.linkedin.com/company/mimta <http://www.linkedin.com/company/mimta>

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