Salt mixture

The present invention relates to a mixture of inorganic nitrate salts comprising sodium nitrate and potassium nitrate in certain proportions which can be used both for the storage of thermal energy and as heat transfer fluid, for example within concentrated solar power (CSP) plants. Preferably the present invention may be used in thermodynamic solar systems with point-focusing, receiver-type power towers using helio-stat mirror geometries on-ground. The present invention may furthermore be used as heat transfer fluid in a number of applications for industrial processes involving heat exchanges in a wide range of temperatures. In accordance with the invention there is provided an anhydrous, binary salt mixture, comprising potassium nitrate KNO3 and sodium nitrate NaNO3 wherein the KNO3 content ranges from 60% by weight to 75% by weight, preferably from 63% by weight to 70% by weight and more preferably from 65% by weight to 68% by weight. 本发明涉及包括定比例的硝酸钠和硝酸钾的无机硝酸盐混合物，其可用于热能储存以及用作传热流体，例如在集中太阳能(CSP)发电厂中。本发明优选地可应用