Hi
I am brand new to this site and a novice with the VE software. IES support suggested joining here for help with a problem. When I run apache sim the temperatures in my rooms a very high, up around 60/70 degree range. I am pretty sure the model is sound and can only think problem lies in thermal templates which also look sound but I am obviously gone wrong somewhere.
I would greatly appreciate any help as I am under pressure to get assignment in.
Temperatures
Re: Temperatures
HI Craig,
Nice to have you on here.
First thing to do would be to grab a room which is reaching these temperatures and have a look at the room variables in VistaPro. If you run the simulation with the detailed simulation outputs switched on for the rooms and the internal gains breakdown ticked on (simulation settings) then we can get a lot of detail of what is happening with the heat balance at the times of peak temperatures.
There are a set of basic room variables you can plot which will be heating load, cooling load (assuming there is no conditioning going on at these times to cause this but worth checking) then you want to view; lighting gain, people gain, misc gain, any other gains, aux vent gain, infiltration gain, nat vent gain, int and ext macroflo gains if applicable to your sim, int and ext conduction gains.
These will show you heat gains into the room (or if negative losses) that you can easily trace back to your model inputs via thermal templates, systems, constructions, adjacent conditions etc. Most typically a large heat gain will be a result of entering a gain as W/sqm but entering the absolute number for the space but without doubt it will be some setting in the model and this basic process is the start of troubleshoooting, analysing and understanding any simulation result you could ever have.
This PDF isn't your exact question but gives another idea to help you find your way around these variables and VistaPro http://www.iesve.com/support/faq/pdf/fa ... around.pdf
Also for descriptions of the variables see the VistaPro User Guide via Help >> User Guides >> Thermal category
Phil
Nice to have you on here.
First thing to do would be to grab a room which is reaching these temperatures and have a look at the room variables in VistaPro. If you run the simulation with the detailed simulation outputs switched on for the rooms and the internal gains breakdown ticked on (simulation settings) then we can get a lot of detail of what is happening with the heat balance at the times of peak temperatures.
There are a set of basic room variables you can plot which will be heating load, cooling load (assuming there is no conditioning going on at these times to cause this but worth checking) then you want to view; lighting gain, people gain, misc gain, any other gains, aux vent gain, infiltration gain, nat vent gain, int and ext macroflo gains if applicable to your sim, int and ext conduction gains.
These will show you heat gains into the room (or if negative losses) that you can easily trace back to your model inputs via thermal templates, systems, constructions, adjacent conditions etc. Most typically a large heat gain will be a result of entering a gain as W/sqm but entering the absolute number for the space but without doubt it will be some setting in the model and this basic process is the start of troubleshoooting, analysing and understanding any simulation result you could ever have.
This PDF isn't your exact question but gives another idea to help you find your way around these variables and VistaPro http://www.iesve.com/support/faq/pdf/fa ... around.pdf
Also for descriptions of the variables see the VistaPro User Guide via Help >> User Guides >> Thermal category
Phil
IES Worldwide Technical Support
-
craig 1977
- VE Newbie
- Posts: 2
- Joined: Mon Sep 07, 2015 11:14 am
Re: Temperatures
Hi Phil,
I managed to solve the problem before your reply but none the less you are right. The problem was among those you pointed out. I had values in W/m2 when it should have Watts. I had 4200 W for the space but I entered as 4200 w/m2, massive heat gain as can imagine. Easy mistake that will not be repeated!
Thank you very much for your reply, I appreciate you giving your time for it
Craig
I managed to solve the problem before your reply but none the less you are right. The problem was among those you pointed out. I had values in W/m2 when it should have Watts. I had 4200 W for the space but I entered as 4200 w/m2, massive heat gain as can imagine. Easy mistake that will not be repeated!
Thank you very much for your reply, I appreciate you giving your time for it
Craig