[Equest-users] Central PV system contribution to single-building

[Keith Swartz]

How about allocating the fraction of the PV capacity based on the square footage of each of the buildings on the system?

Keith Swartz, PE | Senior Energy Engineer
Seventhwave | Madison.Chicago.Minneapolis
608.210.7123 seventhwave.org

From: Sharad Kumar [mailto:sharadcapricious at gmail.com]
Sent: Sunday, November 22, 2015 1:20 AM
To: 赵永青 <503271081 at qq.com>
Cc: equest-users <equest-users at lists.onebuilding.org>
Subject: [Equest-users] Central PV system contribution to single-building

Hi Zara zhou,

I think that you have changed the question.
I will give a try.The PV power generated will be distributed to each building as per their total energy consumption and this PV generated energy can be a big part, whole part or small part as per the building type, usage and demand.
See, there is no rigorous way to find out the balance as it can be anything as estimated by the electrical consultant.
So you can do one thing is to have the building's total energy consumption as per the building usage and distribute it as per the suitability or purpose of the demand of the building.

I mean to say is that it has to be as per the project requirement and building demand.
Another factor can be the site or roof part on which the PV cells are installed.
Hence if the PV plant reach-ability factor is there as the power generated and distributed  will be resolved like that.

Also, at last the most easy and no harm and comfortable way can be is to supply any PV generated power to any building as the energy unit is kWh and is immaterial of the way it is supplied.

I meant to say building usage is a factor as the building may require 24 hour or 12 hour or 8 hour energy supply so based on that, the PV generated power may be supplied.

Also PV generated power can't be for whole year so keeping in mind all these factors one can decide the way to have the energy supply.

I will suggest you can contact your electrical consultant to resolve the issue as i am unknown about the project site and purpose of the project.
May be this can be helpful.


Thanks,
Sharad.Kumar
Green Horizon Consulting LLP
Gurgaon
India.

On Sun, Nov 22, 2015 at 8:48 AM, 赵永青 <503271081 at qq.com<mailto:503271081 at qq.com>> wrote:
Zara zhou's question is how to distribute a central PV generation to each building.However，all the answers are how to calculate PV generation.
---原始邮件---
发件人: "Sharad Kumar"<sharadcapricious at gmail.com<mailto:sharadcapricious at gmail.com>>
发送时间: 2015年11月22日 09:01:14
收件人: "equest-users"<equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>>;
主题: Re: [Equest-users] Central PV system contribution to singlebuilding?

Hi Zhouzarah,

I have done some calculations as per my understanding.
I have done certain assumptions like:
1.  Solar PV area and
2.  Number of months for solar insolation in India.
Insolation is nothing but the direct solar radiation energy per PV sq. meter per day.It can be over the ground surface  also.
For India the average insolation can be from 4 to 6.5 kWh/ sq. meter/ day.
It varies from country to country.[Inline image 1]

Total solar energy generated as electricity per year = Solar insolation (kWh/ sq. meter/ day)X solar PV area X total number of days for proper solar insolation X efficiency of the the solar PV cell.
The efficiency of solar PV varies from 8 to 13 %age for mono crystalline to poly crystalline PV
Hence i have done the calculations.
Even IES-VE has the module to have the solar PV calculations.
This energy can be deducted from the proposed case energy consumption to have the savings.


Thanks,
Sharad.Kumar
Green Horizon Consulting LLP
Gurgaon
India.



---------- Forwarded message ----------
From: zhouzarah <zarahzhou at hotmail.com<mailto:zarahzhou at hotmail.com>>
To: "equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>" <equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>>
Cc:
Date: Fri, 20 Nov 2015 02:10:45 +0000
Subject: [Equest-users] Central PV system contribution to single building‏
Dear eQuesters,

I am working on a LEED certification for one building in an industry park. The park has a solar PV system serving several buildings. So I do not think I can simulate the PV systems directly in eQUEST to get its share to the LEED target building.  My question is how to estimate the PV generated electricity to my building? Should I prorate the PV electricity based on those buildings' energy use, or there is a better way to do the calculation/estimation in the design phase? Any comment is appreciated!

Best regards,

Zarah









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