[Bldg-sim] eQuest - Energy consumption increasing on reducing Glass U-Value

[Javed Iqbal]

In my past experiences, such problems were resolved by using detailed
spectral properties      (LBNL window output) in eQuest for an Indian
composite climate case.



Sent from mobile, pls excuse typos

On Nov 3, 2017 2:47 PM, "akshay gupta" <akshaykg at gmail.com> wrote:

> Hi Javed
>
> Thanks for helping. We were actually modelling using simplified glass
> inputs. But I can try with detailed glass model as well.
>
> Regards
>
>
> On 3 November 2017 at 18:51, Javed Iqbal <javedvit at gmail.com> wrote:
>
>> Thank you, Mr. Jim.
>>
>> Apart from internal loads, it's worth looking into window spectral
>> properties. Sometime simple inputs like U value, SHGC and Tvis is not
>> enough and recommended to use whole assembly window properties generated
>> through LBNL window software which could be imported directly into the
>> eQuest.
>>
>> It might help!!
>>
>> Regards,
>>
>> Sent from mobile, pls excuse typos
>>
>> On Nov 3, 2017 1:37 PM, "akshay gupta via Bldg-sim" <
>> bldg-sim at lists.onebuilding.org> wrote:
>>
>> Hi There
>>
>> I am facing an issue in eQuest in almost all simulation models for most
>> hot and composite indian climates. Whenever we reduce U-value of glass in
>> model, from Single Glazing U-Value of 1 Btu/hr Sqft F to 0.32 Btu/hr Sqft F
>> (or any other U-value lower than 1), we see an increase in energy
>> consumption.
>>
>> Can someone point out principal mistake that may be making in the model.
>>
>> Thanks in advance.
>>
>> Regards
>>
>> Akshay Gupta
>>
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