Thermal Mass - Revision history

Marcin at 01:33, 17 December 2020

2020-12-17T01:33:22Z

← Older revision		Revision as of 01:33, 17 December 2020
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	A practical storage medium could thus be rock/water mix, where the water has good heat exchange qualities. This is for seasonal storage.		A practical storage medium could thus be rock/water mix, where the water has good heat exchange qualities. This is for seasonal storage.

			Since water-tight vessels at high temperature are not low-cost - an easier route to seasonal heat storage may be an insulated volume of higher temperature rock. For example, if we increase the temperature of the rock to 200C or so - then we have achieved a low cost way to store heat in materials using the same volume of material as water. This route would require that we insulate the heat-containing vessel, so there is additional cost involved with insulation.

			Here is a constant interplay of excess energy being available in the summer - compared to winter - though the winter insolation only works in case of having a larger power generation system such as more PV.

	=Notes=		=Notes=

Marcin: /* Effectiveness of Materials */

2020-12-17T01:16:37Z

Effectiveness of Materials

← Older revision		Revision as of 01:16, 17 December 2020
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	=Effectiveness of Materials=		=Effectiveness of Materials for Seasonal Heat Storage=
	Water is the most robust, bulk heat storage medium, 5x the specific heat capacity of rock - and 2.5 the heat capacity by volume since rock is more dense than water (rocks sink).		Water is the most robust, bulk heat storage medium, 5x the specific heat capacity of rock - and 2.5 the heat capacity by volume since rock is more dense than water (rocks sink).

Marcin at 01:16, 17 December 2020

2020-12-17T01:16:20Z

← Older revision		Revision as of 01:16, 17 December 2020
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			=Effectiveness of Materials=
			Water is the most robust, bulk heat storage medium, 5x the specific heat capacity of rock - and 2.5 the heat capacity by volume since rock is more dense than water (rocks sink).

			A practical storage medium could thus be rock/water mix, where the water has good heat exchange qualities. This is for seasonal storage.

			=Notes=
	*830J/kgC specific heat of sand.		*830J/kgC specific heat of sand.
	*830kJ/tonC. Assume a 140 to 90F drop, or 30C.		*830kJ/tonC. Assume a 140 to 90F drop, or 30C.

AbeAnderson at 22:16, 2 January 2018

2018-01-02T22:16:12Z

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	*3 cubic yards are 6 kg of wood.		*3 cubic yards are 6 kg of wood.
	*Conductivity of sand - .25W/MK.		*Conductivity of sand - .25W/MK.
			*4.186J/gC° specific heat of water.

Marcin at 21:15, 29 December 2017

2017-12-29T21:15:31Z

← Older revision		Revision as of 21:15, 29 December 2017
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	*Equivalent heat of 2 kg of wood		*Equivalent heat of 2 kg of wood
	*3 cubic yards are 6 kg of wood.		*3 cubic yards are 6 kg of wood.
			*Conductivity of sand - .25W/MK.

Marcin: Created page with "830J/kgC specific heat of sand. 830kJ/tonC. Assume a 140 to 90F drop, or 30C. 25,000kJ/ton30C 25MJ/ton of storage for normal conditions. Sand weighs 1.3 ton/cubic yard 3..."

2017-12-29T21:13:02Z

Created page with "*830J/kgC specific heat of sand. *830kJ/tonC. Assume a 140 to 90F drop, or 30C. *25,000kJ/ton30C *25MJ/ton of storage for normal conditions. *Sand weighs 1.3 ton/cubic yard *3..."

New page

*830J/kgC specific heat of sand.
*830kJ/tonC. Assume a 140 to 90F drop, or 30C.
*25,000kJ/ton30C
*25MJ/ton of storage for normal conditions.
*Sand weighs 1.3 ton/cubic yard
*32 MJ/yard
*Wood is 16MJ/kg
*Equivalent heat of 2 kg of wood
*3 cubic yards are 6 kg of wood.