Heat Storage in Hot Rocks, Concrete, Pebbles Etc
Water has one of the highest thermal capacities Heat capacity - 4.2 J/(cm³·K) whereas concrete has about one third of that. On the other hand concrete can be heated to much higher temperatures – 1200 °C by e.g. electrical heating and therefore has a much higher overall volumetric capacity. Thus in the example below, an insulated cube of about 2.8 m would appear to provide sufficient storage for a single house to meet 50 % of heating demand. This could in principle be used to store surplus wind or pv heat due to the ability of electrical heating to reach high temperatures. At the neighborhood level, the Wiggenhausen-Süd solar development at Friedrichshafen has received international attention. This features a 12,000 m³ (420,000 cu ft) reinforced concrete thermal store linked to 4,300 m² (46,000 sq ft) of solar collectors, which will supply the 570 houses with around 50 % of their heating and hot water.
Read more about this topic: Thermal Energy Storage
Famous quotes containing the words heat, storage, hot and/or pebbles:
“Friendship is evanescent in every man’s experience, and remembered like heat lightning in past summers.”
—Henry David Thoreau (1817–1862)
“Many of our houses, both public and private, with their almost innumerable apartments, their huge halls and their cellars for the storage of wines and other munitions of peace, appear to me extravagantly large for their inhabitants. They are so vast and magnificent that the latter seem to be only vermin which infest them.”
—Henry David Thoreau (1817–1862)
“I am ashamed
That thou hast power to shake my manhood thus,
That these hot tears, which break from me perforce,
Should make thee worth them.”
—William Shakespeare (1564–1616)
“Phenomenal nature shadows him wherever he goes. Clouds in the staring sky transmit to one another, by means of slow signs, incredibly detailed information regarding him. His inmost thoughts are discussed at nightfall, in manual alphabet, by darkly gesticulating trees. Pebbles or stains or sunflecks form patterns representing in some awful way messages which he must intercept. Everything is a cipher and of everything he is the theme.”
—Vladimir Nabokov (1899–1977)