Utilization of Low-Temperature Gradient Heat Resources especially by Concentration Eergy System of Liquid Solutions

Abstract

We are sorrounded by so many natural heat resources of low temperature gradient as solar heat, ocean heat, atomospheric heat, geo-thermal heat etc. These resources are hoped to be utilized in to general uses more and more in future.In order to accumulate, storage, transport, and utilize these thermal energy resources, the author is going to propose a new energy system which utilize the concentration energy of liquid solution of salts, or organic liquids.Liquid solutions, especially highly concentrated water solutions have an ability of absorption of water vapour, liberating latent heat of condensation at elevated boiling temperature, as used in absorptional refrigerators and room heaters.The concentration energy system proposed here, is a large scale absorption cycle, which accumulate solar heat and other thermal resouces by increasing concentration of water solutions, accumulate the solutions in big tank, distribute and transport the solutions, and utilize them at final users for heating, and power.The temperature of final solutions can be increased by superposing of boiling temperature rise.The feature of this system is the very high ability of energy storge capacity of solutions. An 1kg water solution will absorb 0 .5 kg water vapour which liberates about 300 Kcal latent heat, so the energy capacity of water solution can be said to be 300 Kcal/1kg which is far higher than any other thermal energy storage devises.In future, after patient development efforts, this system will be one of the necessary energy system that can utilize any natural thermal energy resources sorrounding earth evently.