|
Hi Adnan, Further to Jakob’s reply, I have done some experiments on a real building to determine the relationship between infiltration rate and wind speed. I found for this particular
building a very linear relationship between the two variables. I performed a gas tracer decay experiment to calculate the infiltration rates at various wind speeds. Once you have an idea of the magnitude of infiltration rates for several wind speeds, you can
use wind speed as an input to the infiltration in TRNBuild using your derived linear coefficients. And similarly for the convective heat transfer rates on the external walls. Let me know if you want any further advice on your particular project. Kind regards,
Alastair McDowell
Engineering Consultant
Energy Analysis & Engineering – Enabling innovation for a sustainable future
T: +61 450 600 842
E: alastair.mcdowell@energyae.com
608 Harris St Sydney NSW 2007 Australia | http://www.energyae.com From: TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org]
On Behalf Of hotline via TRNSYS-users Dear Adnan, increase of wind speed influences the energy loss of a building in two ways: 1.
Higher convective heat transfer coefficient at the outside of external walls 2.
Higher infiltration rates You can simulate theses effects in TRNSYS like this: 1.
Open the wall type manager in TRNBuild and use an input for back side convective heat transfer coefficient. Correlate it with the wind speed via equations 2.
Use TRNFlow Best __________________________________________________________________________________________________ Jakob Merk M.Sc. Transsolar Energietechnik GmbH Curiestraße 2 70563 Stuttgart Telefon: +49 711 67976-47 Transsolar: KlimaEngineering- Technologien für energieeffizientes Bauen und Nutzerkomfort in
Gebäuden Stuttgart – München – New York – Paris
Geschäftsführer :Diplom-Ingenieur Matthias Schuler, Diplom-Ingenieur Thomas Auer, Diplom-Physiker Stefan Holst, Diplom-Betriebswirt Dieter Schnelle Eingetragen beim Amtsgericht Stuttgart HRB 23347,
Steuernummer: 99073/00911,USt-IdNr.: DE 152272639 Von: TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org]
Im Auftrag von adnan rasheed via TRNSYS-users Hello users, I have a building, for which i am calculating its energy loss through windows i am using TYPE 56 for the building energy simulation. I want to simulate the effect of fix wind velocity outside of the building and want to see the effect of increasing wind velocity on energy loss. I am using QCOMO output to calculate heat transfer through windows. And I
am using equation as an input of wind velocity in TYPE-56, but no change in Heat loss or heat required. Can anybody help me? Regards Adnan Rasheed |