Combined storage
A combination storage tank combines hot water storage both for central heating backup and for DHW heating in a larger container. This means that warm water, typically with solar thermal energy , is temporarily stored for both purposes for later consumption. This means that breaks in the sun can be bridged without any additional heating, depending on the heating requirement and storage tank size. Overall, this takes up less space than two individual buffer tanks and thermal losses are reduced. Most of these storage tanks are insulated on the outside and designed for the lowest possible heat loss. It is usually a tank-in-tank system, i.e. a two-container system arranged one inside the other. So it is a combined buffer storage with a heat exchange plate in between. At the top there is a smaller inner tank for drinking water, i.e. with water for showering, washing, etc. and around the outside the significantly larger storage volume for heating water for room heating.
An alternative is the stratified charge storage system, with the warmest storage layer at the top of the tank and colder layers below. This has the advantage that the different temperatures do not mix and that warm water can be drawn off for longer. The stratified storage tank is currently the most modern form of storage in this area. A fresh water station based on the continuous flow principle with a heat exchanger is used to heat the drinking water , which reduces the risk of legionella and is therefore even more hygienic. Together with an intelligent loading and unloading control, this leads to an efficiency optimization .
Both are particularly useful if they are combined with a so-called low - temperature heating system and good building insulation, so that the energy can be used even more effectively.
literature
- Thermal energy storage. In: K. Oberzig: Electricity and heat for my house: new building and modernization , Stiftung Warentest, Berlin 2013, ISBN 978-3-86851-070-6 , pp. 74-77
- Combined system for DHW heating and room heating. In: K. Oberzig: Electricity and heat for my house: new building and modernization , Stiftung Warentest, Berlin 2013, ISBN 978-3-86851-070-6 , pp. 99-107
- Combined system for DHW heating and room heating. In: K. Oberzig: Solar heat - heating with the sun , Stiftung Warentest, 2nd updated edition from 2014, ISBN 978-3-86851-407-0 , pp. 88-101
- Combined storage. In: Siegfried Blickle et al .: Expertise in installation and heating technology , Europa-Lehrmittel, 5th edition from 2014, ISBN 978-3-8085-1527-3 , p. 563
- Chapter: Storage types and functions. In: K. Oberzig: Solar heat - heating with the sun , Stiftung Warentest, 2nd updated edition from 2014, ISBN 978-3-86851-407-0 , pp. 56–66
- Chapter 3.3 .: Storage. In: T. Schabbach , P. Leibbrandt: Solarthermie: How the sun becomes heat , Springer-Vieweg, Berlin / Heidelberg 2014, ISBN 978-3-642-53906-0 , pp. 50–57
- Chapter 10: Thermal energy storage. In: M. Sterner, I. Stadler: Energy Storage - Demand, Technology, Integration , Springer-Vieweg, Heidelberg 2014, ISBN 978-3-642-37379-4 , pp. 535-574
- Leukefeld , Baer, Hüttmann: Modern heating with solar thermal energy: Safety in the changing energy technology , Publisher: Solare Zukunft, 2nd edition from 2015, ISBN 978-3-933634-44-3 , pp. 57–59