[Equest-users] 答复: Thermal storage modeling issues: high cooling capacity and unmet hours

[Mayank Bhatnagar]

Thank you for valuable suggestions.

However, the model with thermal storage still have unmet hours. I checked
peak building load annually and monthly (LS-C and LS-D report) and found no
change in peak load.

Please guide me to overcome this problem.


On Fri, Apr 25, 2014 at 6:37 AM, Tan, Kevin Zong-Neng <tan.kevin at pbworld.com
> wrote:

> Mayank,
>
>
>
> Pls check your charging sch & discharging sch, this may help.
>
>
>
> Kevin
>
>
>
> *发件人:* Mayank Bhatnagar [mailto:mayank.23aug at gmail.com]
> *发送时间:* 2014年4月24日 13:29
> *收件人:* equest-users at lists.onebuilding.org
> *主题:* [Equest-users] Thermal storage modeling issues: high cooling
> capacity and unmet hours
>
>
>
> Dear eQuest users,
>
>
> I need help in thermal storage modelling. The issue which I have faced is:
>
> The project have 4 chiller (2200 TR each). To reduce peak load in day
> time, I have modeled thermal storage of 8000 TR-h (95 MBTU) with charging
> and discharging rate at 11.9 MBTU/h and 12 MBTU/h. To size each chiller
> capacity, I modeled chillers as autosize in both case (with and without
> thermal storage).
>
> When there is no thermal storage the chiller sizing is 2386 TR each (4
> chiller) with zero unmet hours and When I modeled thermal storage and a
> chiller dedicated to thermal storage and other three are working as
> supporting to thermal storage. The chiller size in this case are 3 chillers
> of 3496 TR and one chiller of 1026 TR and 5467 unmet hours.
>
>
> I am following procedure as mentioned in tutorial (attached). However, I
> got unmet hours and higher cooling tonnage than without thermal storage
> case.
>
> Please help me to sort out this problem.
>
> Regards,
> Mayank Bhatnagar
> Energy Analyst
>
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