Abstract

A thermal energy storage arrangement comprises a storage vessel for storing liquid, a heat exchanger, a variable-speed pump, a temperature sensor and a control system. The storage vessel comprises a vessel liquid inlet and a vessel liquid outlet. The heat exchanger comprises a primary liquid inlet and a primary liquid outlet, wherein the primary liquid inlet is connected to the vessel liquid outlet and the primary liquid outlet connected to the vessel liquid inlet so as to form a primary liquid circuit. The heat exchanger also comprises a secondary liquid inlet and a secondary liquid outlet for connecting to a secondary liquid circuit. The variable-speed pump pumps liquid through the primary liquid circuit. The temperature sensor detects the temperature of liquid within the secondary liquid circuit. The control system controls the pumping speed of the variable-speed pump based on an output of the temperature sensor.

IPC Classes  ?

• F24H 15/34 - Control of the speed of pumps
• F24H 15/215 - Temperature of the water before heating
• F24H 15/219 - Temperature of the water after heating
• F24D 3/08 - Hot-water central heating systems in combination with systems for domestic hot-water supply
• F24D 11/00 - Central heating systems using heat accumulated in storage masses
• F24D 17/00 - Domestic hot-water supply systems
• F24D 19/08 - Arrangements for drainage, venting or aerating
• F24D 19/10 - Arrangement or mounting of control or safety devices
• F24H 1/18 - Water-storage heaters
• F24H 1/20 - Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
• F24H 15/144 - Measuring or calculating energy consumption
• F24H 15/238 - Flow rate
• F24H 15/414 - Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based