Project management:            Marco Gölz, marco.goelz[at]hs-esslingen.de
Project duration:            01.04.2023 – 31.03.2025

Minimise, substitute, compensate; this is not only the strategic triad on the way to a (net) greenhouse gas-neutral state administration by 2030 or as an entire society by 2045, but also indicates a priority. Increasing energy efficiency in building and equipment technology and their utilisation is the central approach.

When it comes to supplying our state-owned university buildings with space heating, a heating (body) surface is the central interface between the building with the system technology and the users in almost every case.

LiLEta aims to systematically analyse this interface in both directions (building/technology and users) for information that can be used to increase usage and system efficiency.

The application is a central component of this endeavour, as greenhouse gases can only be reduced in the application. Simulation and experimental laboratory work will first be used to develop the necessary framework information and build a model. This is then used in a prototype field measurement in office and lecture rooms at the university. The project duration over two heating periods allows for very good informative value and functional maturity. At the end of the project, in addition to scientific publications, an exemplary prototype for corresponding facilities should also be available.

Through the EMAS network and, as a cluster university, the state network of climate protection managers of the Baden-Württemberg Ministry of Science, Research and the Arts (MWK), Esslingen University of Applied Sciences maintains very good contact with the facility management departments of other universities and the state building administration. In the current project, these contacts can be used to present the project and to enquire about special lecture theatre situations at other universities in order to detail the transferability study.

LiLEta is funded by the Baden-Württemberg Climate Protection Foundation as part of the ‘Climate Protection on Campus’ programme with €228,750. The project is being carried out as part of a doctoral thesis at Esslingen University of Applied Sciences in the Faculty of Natural Sciences, Energy and Building Technology and is being supervised by Prof Dr Markus Tritschler.

The ‘LivingLab’:

In the LivingLab, the experimental set-ups of the LILETA project are analysed and tested in detail. It is a realistic test environment in the office and lecture rooms at Esslingen University of Applied Sciences. The LILETA room sensors perform the following measurement tasks:

• Radiator and wall temperature: Using a non-contact infrared method, the radiator temperatures and, in some cases, the external wall temperatures are recorded in real-life usage scenarios.
• Room humidity and CO₂ concentration: In addition to the room temperature, the room humidity and CO₂ concentration in the room are also recorded.
• People counting: In order to obtain an indication of the number of people present, especially in the lecture rooms, the number of distinguishable MAC addresses of the end devices in the vicinity of the sensors with activated WLAN and Bluetooth is counted (the MAC addresses are not saved, only the number).