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## World UTCI and MRT

A "new" database has been made available by the EU, from the Copernicus project (free access, login required).

UTCI and $T_{MRT}$ , August 31st, 2018

This dataset provides a complete historical reconstruction of the UTCI (Universal Thermal Confort Index, a thermal comfort index as well as the MRT (Mean Radiant Temperature, essential for the thermal comfortestimation), from 1979 up to today. Those parameters are computed by the ERA5-HEAT (Humen thErmAl comforT) model. It is based upon a reanalysis of observations from across the world, to provide a globally complete and consistent description of the Earth’s climate and its evolution in recent decades.

Technical data:

DATA DESCRIPTION
Data type Gridded
Horizontal coverage Global except for Antarctica (90N-60S, 180W-180E)
Horizontal resolution 0.25° x 0.25°
Vertical resolution Surface level
Temporal coverage 1979-01-01 to near real time for the most recent version.
Temporal resolution Hourly data
File format NetCDF
Conventions Climate and Forecast (CF) Metadata Convention v1.6
Versions UTCI v1.0
Update frequency Intermediate dataset updated daily in near real time, Consolidated dataset monthly updates with 2-3 month delay behind real time.

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## IBPSA 2019

Thermal comfort and the simulation of natural ventilation, for us that means a lot! Our researchers Edouard WALTHER and Antoine HUBERT presented their latest advances at the IBPSA World #bs2019 conference in partnership with École Normale Supérieure Paris-Saclay.

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## 160 Cores dedicated to building physics

Since 2017, The Hypercube has been performing detailed airflow simulations and implementing numerical optimization procedures. These methods require significant computing power, which until now has been provided by "virtual machines" in Microsoft's Azure cloud. The team thus had 24 bodybuilt "machines" (8 ultra-clocked logic cores and 56 to 112 GB of RAM), switched on on demand and allowing a high reactivity.

This solution, which has been in use for 2 years, limited us in terms of reactivity (IT maintenance) and connectivity (data transfer speed) with a non-negligible associated cost.

The question then arose, with the AREP IT team, of an opportunity to invest in an "on-premises" calculation server... It is now done! It has just been delivered, in kit form.

It is therefore a computing rack with 4 processors, 20 cores each capable of hyperthreading (virtualization of a second core), in other words, 160 cores dedicated to simulating building physics phenomena! This represents the equivalent of more than 25 high-performance computers (for example for 3D visualization).

Today, this "beast", with 256 GB of RAM memory, extensible up to 3TB, runs on the open source Linux operating system (Debian 9).

Many thanks to AREP IT Services for their advice, support and energy!

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## An autonomous measuring station for diagnosis

Resulting from a partnership of more than two years between AREP and the electrical engineering speciality of the INSA of Strasbourg, here is an autonomous measuring station, started during previous projects (see L'Hypercube references) which was finalized in January 2019 thanks to the Technological Research Project of François-Alexandre Fournier, a GE5 engineering student at INSA: we thank him here for his unequalled investment!

Including a Raspberry PI base and low power wireless sensors Whisper node from WISEN, this station was custom developed for AREP's needs and includes a dozen temperature and humidity probes as well as a CO2 sensor. Particular attention was paid to energy consumption and robustness of operation during the project. Field tests are planned for 2019.

[ Autonomous station: Raspberry PI + 868 MHz communication with wireless sensors]