Patent DE-102009036550-A1 (DE)
Title: Device for intermediate storage of thermal energy, comprises a first part area that is traversed by a tube guide system, and a second part area in which a thermal unloadable and reloadable storage medium is arranged
Inventor: BAHL CARSTEN
IPC: F28D20/00
Filed: 2009-08-10
Abstract: The device comprises a first part area that is traversed by a tube guide system (11) in which a process medium (14) flows to feed and discharge of thermal energy, a second part area in which a thermal unloadable and reloadable storage medium (6) is arranged, a current-guiding device for controlling and/or regulating fluid streams, and means for direct coating or discharging of storage medium with thermal energy. A fluid (15) flows to the first and second part areas of the device for the transmission of thermal energy between the tubular guide system and storage medium. The device comprises a first part area that is traversed by a tube guide system (11) in which a process medium (14) flows to feed and discharge of thermal energy, a second part area in which a thermal unloadable and reloadable storage medium (6) is arranged, a current-guiding device for controlling and/or regulating fluid streams, and means for direct coating or discharging of storage medium with thermal energy. A fluid (15) flows to the first and second part areas of the device for the transmission of thermal energy between the tubular guide system and storage medium during loading and/or unloading of the storage medium. The storage medium comprises flow spaces for flowing the fluid. The first and the second part areas are directly adjoined to each other within the device. The first part area is arranged along an axis and is surrounded over its circumference of the second part area. The first part area is arranged along a plain and the second part area is arranged along both sides of the first part areas. The areas limiting the flow areas comprise ribs or profiles for improving the heat transmission. The storage medium is formed by a body with steady external area. The body is formed as single-piece solid body and the flow areas are formed by flow channels (9) or flow slits in the solid body. The body is formed by form bodies with flow channels. The form bodies form flow gap through arrangement in mutual interval. The flow area comprises a meandering process. The form body possesses a distinct longitudinal direction and is arranged to each other under formation of flow gap in lateral interval. The plains adjoining the form bodies are laid over cross. The body consists of concrete, fireclay, stones, ceramics or solid salts. The body is formed by bulk material and forms intermediate area in the bulk material of the flow area. The bulk material consists of mineral material having uniforms grains. The bulk material consists of slag, metals or solid salts in processing temperature. The bulk material exists in fluid-traversed gabions. The body has solid additives in processing temperature for increasing thermal conductivity. The body is formed by a container that is filled with a fluid in processing temperature of the storage medium. The container is filled with fluid sulfur, fluid salt or thermo-oil. The process medium is formed from oil, water, steam or damp air. The tubes of the tube line systems are put over a part of its length in loop. The tubes of the tube guide systems comprise ribs or profiles at its external side for improving the heat transmission. The inlet and outlet of the tube guide systems are arranged at an upper side of the storage medium so that the tube guide system is removed towards the side of the device. The first part area of the fluid is flow throughable in vertical direction. The fluid and the process medium of the first part area flow in opposite directions. A forced or natural convection of the fluids is provided within the device. A circular flow of the fluid is present between the first and second part areas. In the first part area, a further tube guide system is arranged. The tube guide system is determined for loading the storage medium with thermal energy. The device is surrounded by a thermal insulation.