Fraunhofer Institute for Solar Energy Systems ISE
In order to operate buildings, we have to reduce energy requirements and then cover these as far as possible with renewable energies in a cost-, energy- and resource-efficient manner. This is where our work in the field of efficient ventilation, air conditioning and refrigeration technology comes in.
Heat pumps are our main focus for the heat supply of buildings. We offer the entire value-added chain for this technology: from component development in the refrigeration circuit, through equipment and system development, to quality assurance in real operation. The focus is on the optimization of heat exchangers and the use of climate-friendly and natural refrigerants, such as propane.
Our focus in the field of heat exchanger development is the targeted identification of structure/material and coating combinations depending on the system requirements. This enables us to identify new potentials for material savings and COP (Coefficient of Performance) increase for aligned 3D structures (fibers, wires, fabrics). In addition, a suitable combination of hydrophilic/hydrophobic surface coating can be used to prevent condensate blocking and reduce ice formation when used as evaporators.
We place a special focus on the development and evaluation of comfort-oriented and energy-efficient ventilation for residential and office buildings. For this purpose, air quality, air temperature and air humidity as well as their spatial distribution must be combined with efficient heat recovery concepts and suitable flow control. Energetic aspects are considered as well as the evaluation of indoor air quality with regard to comfort and user behavior.
The provision of fresh supply air for residents and users that is adjusted in terms of temperature and humidity as well as highly efficient heat recovery are further focal points of our work.
The energetic evaluation is based on simulations and experimental characterization. This also enables us to develop and evaluate new types of heat exchangers. When it comes to dehumidification, we use our extensive expertise in the development, characterization and processing of sorption materials.
