... energy storage concept for solar power towers is being developed, in which quartz sand serves as a storage medium. Sand is suitable due to its properties such as high thermal stability, specific heat capacity, and low-cost availability. Compared with storages based on ceramic bodies, the use of sand...

..., such important parameters as subcooling and superheat, evaporating and condensing pressure are not well controlled because the flow rate is passively determined by the tube size, pressure difference, and degree of subcooling, etc. 5 . heat pumps refrigerants thermal expansion specific heat valves...

... , have been investigated as solar thermochemical processes by some research groups worldwide for more than two decades. Hydrogen production Solar heat Thermochemical conversion Natural gas reforming Reforming catalyst solar absorber-convertors specific heat hydrogen economy chemical...

...: V. Mei. 01 May 2000 01 July 2001 01 08 2002 refrigeration adsorption condensation evaporation carbon ammonia cooling specific heat Activated Carbon Ammonia Mass Recovery Heat Recovery Adsorption Refrigeration Cycle Solid sorption refrigeration...