The basis of energy conservation is the newly developed counter-current heat exchanger layer (GWST®-Gegenstrom-Schicht-Wärmeaustauscher) and the resulting GWST®-technology. This heat exchanger technology makes the counter-current principle feasible and economical. Exchange temperature rates of up to 90% are achieved simultaneously for both media, which retains the value of the energy. The temperature exchange is due to an innovative arrangement of the heat exchanger surfaces in the counter current principle and the given temperature difference. The entire heat exchanger is constructed from a large number of functional heat exchange layer modules. This ensures on one hand easy installation, particularly for renovation and retrofitting, and on the other hand high redundancy and reliability. Furthermore, this design guarantees automatic venting of the heat exchanger.
The GSWT®-technology used successfully since 1984 for all heat transfer processes between water and air, particularly in air-conditioning technology. Other applications include natural cooling systems, re-cooling plants and air coolers/heaters.
The resulting heat recovery systems in the circulation system work with minimal energy consumption and are thus highly efficient. The efficiency was further increased when the systems were used multifunctional. 1984/85 the integrated reheating and sub-cooling was launched. In this process the circulatory fluid is post-conditioned and therefore the air-side heat exchanger can be dispensed with. 1986, saw the first use of indirect adiabatic evaporative cooling to improve the use of a heat recovery system in the summer months, additional features established on the market were for example pre-heating service water, free cooling, zone technology, dehumidifying cooling heat recovery, refrigeration re-cooling, solar heat, cool night use or integration of current-carrying CHPs. This makes efficiency values of 1:20 to about 1:100 possible, i.e. with 1 part electricity 20 to 100 parts of heat, cold and re-cooling is generated. In 1998 SEW® was the first company awarded with the Faktor-4Plus prize by Prof. Ernst Ulrich von Weizsäcker. The amortization of such energy-saving systems is possible by the high energy savings in the shortest time. Due to the high redundancy of GSWT®-technology a multiple return on investment through cost savings in other buildings or structures is possible. In addition to highly efficient energy savings SEW® supports the high quality design of air-conditioning systems for a maximum of air quality and uses the GSWT®-technology to achieve reduced CO ² emissions.
SEW® is a member of the associations/organisations: Bundesfachverband öffentliche Bäder (BÖB) / Federal Association of Public Baths, Deutsche Gesellschaft für Nachhaltiges Bauen (DGNB) / German Sustainable Building Council, Internationaler Arbeitskreis Sport- und Freizeiteinrichtungen (IAKS) / International Working Group on Sport and Leisure Facilities, Fachvereinigung Krankenhaustechnik (FKT) / Professional Association Hospital Technology, FachinstitutGebäude-Klima (FGK) / Institute of Building Air Conditioning, Wissenschaftliche Gesellschaft Krankenhaus-technik (WGKT) / Society Clinical Engineering and TÜV Rheinland.
Company Information -
- Real estate: 9400 m²
- Office and assembly areas: 4340 m²
- Employees: 80
- Turnover 2011: € 12 million