| 摘要 |
A method and an apparatus for storing heat energy in a hybride heat storage apparatus comprising a first and a second material are disclosed, the first and the second materials having different melting temperatures and different densities and being non-mixable. When heat is discharged from the heat storage apparatus, the first material, which has the lower melting temperature, is brought into direct heat exchanging contact with the second material which is essentially in a liquid state by causing droplets of the first material having a lower temperature than the melting temperature of the second material to pass through the second material, whereby the droplets of the first material are heated and may be used in order to give off the heat in an outer circuit, while the second material sets essentially in droplet form. When heat is supplied to the heat storage apparatus, liquid flow channels are formed through the second material, which is essentially in a solid state, whereupon droplets of the first material, which have a higher temperature than the melting temperature of the second material are caused to pass through the flow channels whereby the second material around the flow channels are caused to melt by direct heat exchange. Preferably, the first material has a higher density than the second material, the first material being sprayed or showered onto the material. The hybride heat storage apparatus comprises a vessel containing the first and the second material, the said materials being located in layers on top of each other; supply line which comprises a droplet forming apparatus, whereby the first material, which has the lower melting temperature, is divided into droplets; and a discharge line for the first material. |
