Strains and stresses in the rock around and unlined hot water cavern |
| |
| Authors: | Göran Rehbinder |
| |
| Institution: | (1) Swedish Rock Engineering Research Foundation, Stockholm, Sweden |
| |
| Abstract: | Summary Hot water stored in an unlined rock cavern is an efficient energy storage. A research program has been carried out with a test plant at the city of Avesta, Sweden. The plant consists of a rock cavern, the volume of which is 15000 m3, which serves as an energy buffer in the district heating system of the city. The water is heated from a garbage incinerator located close to the cavern.During the first test period the temperature of the stored water has varied between 40°C and 95°C. The heating of the rock causes strains and stresses in the rock. The measurements show that the state in the rock does mainly respond to the average temperature and not to the fluctuations. The maximum thermal stress is 9 MPa occurring at the wall of the cavern. The heave of the ground is less than 5 mm.The development of stress and strain will continue after the first test period since thermal equilibrium was not reached during this period. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
