A paper of the Graz University of Technology dealing with concrete core activation is now available on the HTflux website. The article summarizes the main findings of the study carried out in the scope of the diploma thesis of Wolfgang Gappmaier. (more…)
The English translation of this great book by Hermann Kaufmann, Stefan Krötsch and Stefan Winter and many others is now available. I’m glad I had the opportunity to contribute a small chapter on summertime overheating to this great book. (more…)
Thanks to the kind support of Ana Teresa Vaz Ferreira Ramos the HTflux user-interface is now fully translated into Portuguese! (more…)
This example taken of the diploma thesis of Mr. Wolfgang Pöll shows how HTflux can be used to optimize timber construction details. With the very comprehensive approach of HTflux it is possible to address condensation risk and heat loss at the same time.
Great interest and feedback on my presentation on “Summertime-Overheating in Buildings” held at the Holzhaustage in Bad Ischl. Using videos of dynamic thermal simulations created with HTflux it was easy to vividly illustrate the function of thermal mass.
I’ll be happy to share my views on this issue of growing importance elsewhere… 😉 (more…)
The new version of HTflux V1.10 is currently being rolled-out. This means HTflux will suggest to update upon the next program launch. We do recommend to proceed the update as soon as possible. The new version of HTflux offers many new features, improvements as well as bug-fixes. (more…)
To demonstrate the usefulness of the new fluid-dynamic calculation tool, we present a simple but very interesting application. Of course, the method and tool described can be used to simulate the heat transfer of flows of all kinds of fluids such as air, gas, water, oil, refrigerant etc. (more…)
Everything you always wanted to know about your heating system…
In the following example two underfloor heating systems are simulated using the dynamic simulation feature of HTflux. Based on these transient simulations we will reveal the differences in the dynamic behavior between these two systems. (more…)
In his bachelor’s thesis Andreas Schmid of the East Bavarian Technical University of Applied Sciences Amberg-Weiden used HTflux for the hygrothermal assessment and optimization of construction details under exceptional climate conditions. (more…)
The following short demo shows a project created during an HTflux online training session. The capabilities of HTflux regarding dynamic simulation were shown with a simple simulation of a wall-heating system. (more…)
Appropriate for the season and the current cold weather conditions in Europe a new feature has been integrated in to HTflux. The new feature will be available in next version of HTflux (1.10) which will be rolled out soon. It allows the simulation of freezing soil considering latency heat while freezing, as well as the change in thermal conductivity and heat capacity of the frozen ground. (more…)
Invited by the Berne University of Applied Sciences I was able to speak at the 22nd International Timber Construction Forum in Garmisch-Partenkirchen (Germany) with a presentation on “Summertime overheating risks and climate change”. (more…)
Thermal bridge optimization raised to the power of two! We proudly announce the cooperation with the world’s leading supplier of innovative thermal insulation solutions. In cooperation with Schöck Bauteile Ges.m.b.H, Vienna we were able to create a comfortable tool that allows users to easily process individual thermal simulations with ISOKORB® elements. (more…)
The following practical example demonstrates how HTflux can be used to efficiently analyze even complex details with little effort. The details shows the connection of a PVC window to a timber frame wall. A comprehensive assessment regarding the condensation risk of the detail can easily be performed using HTflux unique Glaser-2d function. (more…)
A research report on summer overheating is available now. The report summarizes the findings of a research project carried out within the scope of the building science lab of the Graz University of Technology. (more…)
Due to a migration of our servers you might be unavailable to launch HTflux and to reach our website for several hours. The migration will take place at local night-time, starting at August 30th 20:00 CEST (18:00 UTC) and can take until August, 31th 8:00 CEST (6:00 UTC). We apologize for any inconvenience you might experience.
The new beta version V1.00 of HTflux is out now. We highly recommend updating as the new version offers new features and small bug fixes. Due to organisational issues the beta phase will be extended. All licences were automatically extended until May.
The following example demonstrates how efficiently HTflux can be used to calculate precise thermal key figures of an inhomogeneous construction element, e.g. a timber-frame wall. Not only will the thermal transmittance (U-value) of the wall be calculated, but also the dynamic thermal performance figures.
Chile, being a country of climatic extremes, containing not only the driest place on earth, but also the coldest region of South America is also focusing on energy efficient and hygrothermally optimized buildings. (more…)
The timber research competence center “Holzbauforschung” at the Technical University of Graz uses HTflux to efficiently evaluate and compare CLT construction details.
More on www.holzbauforschung.at
The new beta version V0.99 of HTflux is out now. It will be the last beta version before to official release, coming very soon. We highly recommend updating as the new version offers new features and small bug fixes.
Thanks to the excellent cooperation and professional skills of Mr. Cristián Muñoz the entire user-interface of HTflux is now also available in a high quality Spanish translation. Mr. Cristián Muñoz is architect as well as expert for Energy Efficiency and Sustainability at the CITEC, University of Bio-Bio, Chile.
Balcony and cantilever floor insulation – a comparative study regarding thermal and energetic aspects
In the study various insulation methods of a cantilevered slab (e.g. a balcony) are being compared. The study covers only the energetic (heat loss) and thermal aspects of the different cases. Economic, aesthetic and constructive aspects will also have to be considered, but are not part of this review.
We would like to inform you about the release of the new beta version V0.98 of HTflux. We highly recommend the update as the new version offers new features and small bug fixes. (more…)
A new feature of HTflux allows you to easily create and calculate insulated glazing units (IGUs). The new tool offers a lot of features:
The following example demonstrates the possibilities of using the HTflux heat source feature. The task was to optimize a window frame heating for an indoor pool area. The aim of the heating cable design was firstly to avoid condensation at the floor section of the sliding door frame and secondly to prevent damage of the frame caused by freezing. (more…)
HTflux latest feature enables you to process transient thermal simulations. Using the built-in video encoder you can easily create high-resolution videos of the temperature as well as of the heat-flux view or you can export the time-resolved data of the measuring tools (such as temperatures, total heat flux,…) for further analysis. This enables you to calculate dynamic thermal characteristics of your assembly (e.g. periodic thermal transmittance, time shifts, decrement factor,…)
The video shows a simulation of underground cable array exposed to a cyclic daily clear sky photovoltaic load (maximum PV-load). The boundary conditions have been chosen to largely comply with the relevant standard VDE 0276 (20°C surface temperature, adiabatic boundaries below surface). (more…)
HTflux is highly suitable for designing, optimizing or assessing timber constructions. The design of timber constructions can be very demanding from a hydrothermal point of view. HTflux will give you the information you need for this task. It provides precious information for passive house planners, but it’s ease of use make it suitable for the whole construction industry. As an example we present a pitched roof junction detail of a timber frame construction. (more…)