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Re: [TRNSYS-users] Tank loss

The tank loss coefficient dictates the heat loss from the tank.  The losses from the tank are simply:

Tank Loss Coefficient * Tank Surface Area * (Tank temperature - Environment temperature)

Refer to the mathematical description manual for questions like this as the manual gives the governing equations for the models and helps answer questions like this.  The lower the tank loss coefficient the lower the thermal losses from the tank and the longer the fluid in the tank will remain above your critical threshold temperature.

Jeff Thornton
President - TESS, LLC

22 North Carroll Street - Suite 370
Madison WI 53703 USA

Phone: 608-274-2577
Fax: 608-278-1475
E-mail: thornton@tess-inc.com
Web: www.tess-inc.com



----- Original Message -----
From: "Muhammad Farooq" <engr_farooq85@yahoo.com>
Sent: Tue, August 16, 2011 20:18
Subject: [TRNSYS-users] Tank loss

Hi,

      can u please tell me about the parameter 11"tank loss coefficient" of thermal storage  tank type 60 No heat (Detailed fluid storage tank vertical cylinder with uniform losses, 2 inlets and 2 outlets).

What effect it has on the heat loss from the tank.As i am optimizing coupled solar thermal collector and heat pump for domestic hot water heating.I want the heating period of the storage tank to be 4 hours meaning the hot water must be at 55 deg centigrade for! 4 hours.

what effect has this parameter on the heating period o f the storage tank.

                                                                                             Muhammad Farooq

                                                                                           Loughborough University

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