[esp-r] Re: Strange plant results for very simple model

[Nicolas Kelly]

Radu - the problem is likely to be the fan model. Check the component's data - especially the rated flow rate. If this is significantly less than the rate you've assignmed to the component then the model generates a significant amount of heat. To get rid of the problem - increase the rated flow value to the assigned flow value for the component.

Regards.

Nick Kelly

________________________________________
From: esp-r-bounces at lists.strath.ac.uk [esp-r-bounces at lists.strath.ac.uk] On Behalf Of Radu Trimbitas [radu_trm at yahoo.com]
Sent: 02 December 2009 23:25
To: esp-r at lists.strath.ac.uk
Subject: [esp-r]  Strange plant results for very simple model

Hello,

I have a very simple model with:
-one zone where nothing happens (no windows, no doors, yet attributed)
-one simple plant [ambient => duct => zone => out fan =>  duct] linked to that zone.
There's no heater, aside the sun.
Yet after running a simulation for 10-15of January (climate = France/Paris/Orly) res displays air at +70 C at plant fan air node.

I've tried to get inspired/compare with various examples included with esp-r but I don't see where's the fault. Given the model is small, I attach it here - I hope its not against list's policy.
I hope somebody can spot and point me to the mistake(s) I've made.

Using esp-r 11.7 on Ubuntu 9.10.

Thank you!

Regards,
Radu

PS I only have the esp-r cookbook for documentation - I might be a little slow, but I feel it's not enough. I've seen a book 'Energy Simulation in Building Design, Second Edition' of M. J. Clarke. I doubt I have to mention, I'm new to simulation, esp and I don't have a strong background in thermodynamics. Is there any chance that I can find useful things for me? Just wondering if not too advanced for poor me.