We will be performing a major infrastructure and web site ugprades on Friday, September 27th 8:00 am - 5:00 pm MST (UTC -7).

The website will be down during that time.

Annual water usage

  • mokhtar.ghod@gmail.com
  • Topic Author
More
14 Mar 2022 23:38 - 15 Mar 2022 16:41 #10683 by mokhtar.ghod@gmail.com
Annual water usage was created by mokhtar.ghod@gmail.com
Dear Professors,

How are you all? I hope you are fine and in good health.

I would like to ask you how to calculate the annual water usage in DSG Linear Fresnel power plants, as I have compared three DSG LFR power plants in different places, and I found that the higher the production of the electrical station, the higher the annual water usage consumption. I would like to know what is the relationship between them? I've even read many of your articles but can't find an answer (sam.nrel.gov/component/search/?searchword=annual%20water%20usage&searchphrase=all&Itemid=282).

So, is there a specific equation or method that I can numerically prove the calculation I came up with?

The same observation I found with the Net capital cost, is there an explanation for that? As the production of the DSG LFR power plant increases, the Net capital cost increases with it (note that the stations are completely similar in their installation).

Please let us know your valuable information on this issue.

Thank you in advance, and we thank you very much for all your valuable efforts.

With best regards.
Last edit: 15 Mar 2022 16:41 by pgilman.

Please Log in or Create an account to join the conversation.

  • pgilman
More
15 Mar 2022 16:53 #10691 by pgilman
Replied by pgilman on topic Annual water usage
Hi Mohktar,

For the Direct Steam Linear Fresnel and other CSP models, the water usage depends on 1) the mirror washing inputs on the Solar Field page, and 2) the condenser type for plant cooling on the Power Cycle page.

The source code for plant cooling water loss is here:

github.com/NREL/ssc/blob/ca964fc280268b4e4efe686dc66c3c01ad555430/shared/lib_powerblock.cpp#L1370

Water usage for mirror washing is calculated as following:

Water Usage (L/yr) = Water Usage per Wash (L/m2) * Washes per Year (1/yr) * Actual Aperture (m2)

You can see how the Net Capital Cost is calculated by going to the Cash Flow tab of the Results page and clicking Send to Excel with Equations (Windows only). SAM opens a special Excel file that shows how the financial model calculations work:



Best regards,
Paul.
Attachments:

Please Log in or Create an account to join the conversation.

  • mokhtar.ghod@gmail.com
  • Topic Author
More
15 Mar 2022 20:44 #10695 by mokhtar.ghod@gmail.com
Replied by mokhtar.ghod@gmail.com on topic Annual water usage
Dear Prof. Dr. Paul,
How are you? I hope you are fine and in good health.
Thank you very much for your very valuable and useful explanations.
With best regards.
***
M. Ghodbane

Please Log in or Create an account to join the conversation.

Moderators: pgilman
Powered by Kunena Forum

NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC.

NREL Home

NREL Research

Follow NREL

NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC.