Penny a kWh - Revision history

Hkhenson: /* Thermal alternative to PV */

2012-05-21T22:42:39Z

Thermal alternative to PV

← Older revision		Revision as of 22:42, 21 May 2012
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	==Thermal alternative to PV==		==Thermal alternative to PV==

	Most power satellite work has assumed PV cells because they are already well proved in space. Having no moving parts helps for communication satellite that cannot be serviced at all. For 10 GW scale power satellites thermal turbines may be attractive. They would probably need to be installed in counter rotating pairs to minimize angular momentum problems.		Most power satellite work has assumed PV cells because they are already well proved in space. Having no moving parts helps for communication satellite that cannot be serviced at all. For 10 GW scale power satellites thermal turbines may be attractive. They would probably need to be installed in counter rotating pairs to minimize angular momentum problems. The Excel file here [radiator_temperature_extended.xls‎] shows minimum mass at ~130 deg C.

	'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])		'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])

Hkhenson: /* Cost of Space Based Solar Power */

2012-05-21T22:37:22Z

Cost of Space Based Solar Power

← Older revision		Revision as of 22:37, 21 May 2012
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	Allocating $200/kW to the rectenna, $900/kW ($450/kW before 50% transmission loss) to buying power sat parts and $500/kW for lift to GEO, then the lift cost cannot exceed $100/kg for 5kg/kW power sats.		Allocating $200/kW to the rectenna, $900/kW ($450/kW before 50% transmission loss) to buying power sat parts and $500/kW for lift to GEO, then the lift cost cannot exceed $100/kg for 5kg/kW power sats.

			==Thermal alternative to PV==

			Most power satellite work has assumed PV cells because they are already well proved in space. Having no moving parts helps for communication satellite that cannot be serviced at all. For 10 GW scale power satellites thermal turbines may be attractive. They would probably need to be installed in counter rotating pairs to minimize angular momentum problems.

	'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])		'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])

Hkhenson: /* Cost of Space Based Solar Power */

2012-03-08T17:15:56Z

Cost of Space Based Solar Power

← Older revision		Revision as of 17:15, 8 March 2012
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	Energy cost (in cents/kWh) would be production cost in $/kW divided by 800.		Energy cost (in cents/kWh) would be production cost in $/kW divided by 800.

	To get penny a kWh, the production cost of the power satellite cannot be more then $800 per installed kW. (Compare with current estimates for nuclear power of about $8000 per kW.)		To get penny a kWh, the production cost of the power satellite cannot be more then $800 per installed kW. (Compare with current estimates for nuclear power of about $8000 per kW.) The target here will be 2 cents per kWh with off peak power eventually being sold for 1 cent per kWh to make hydrogen.

	~~The [[rectenna]] estimate is $200/kW based on [[~~power ~~inverter\|inverter]]s costing~~ $60/~~kW (same as PC~~ power ~~supplies which have the same parts). We can spend $600-700 per kW on parts~~, ~~lifting them~~ to ~~[[geosynchronous orbit\|GEO]]~~ and ~~assembly~~.		(Because power satellites at $1600/kg and no fuel cost are the least expensive source of power, they will eventually be built out to peak demand. The difference between peak demand and baseload will be fed to hydrogen electrolizers.)

	Allocating 1/4 to the rectenna, 1/4 to buying parts and 1/2 for lift to GEO, then the lift cost cannot exceed ~~$200/kg for 2kg/kW power sats and~~ $100/kg for ~~4kg~~/kW power sats.		The [[rectenna cost]] estimate is $200/kW based on [[power inverter\|inverter]]s costing $60/kW (same as PC power supplies which have the same parts). We can spend $1400 per kW on parts, lifting them to [[geosynchronous orbit\|GEO]] and assembly.

			Allocating $200/kW to the rectenna, $900/kW ($450/kW before 50% transmission loss) to buying power sat parts and $500/kW for lift to GEO, then the lift cost cannot exceed $100/kg for 5kg/kW power sats.

	'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])		'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])

Hkhenson: /* Cost of power sat energy */

2011-08-29T21:57:37Z

Cost of power sat energy

← Older revision		Revision as of 21:57, 29 August 2011
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	As the cost of power declines to a '''penny a kWh''', space-based power picks up the entire oil and gas markets. The only source that competes is installed [[hydroelectric power\|hydro]].		As the cost of power declines to a '''penny a kWh''', space-based power picks up the entire oil and gas markets. The only source that competes is installed [[hydroelectric power\|hydro]].

	==Cost of ~~power sat energy~~==		==Cost of Space Based Solar Power==

	The rough cost of ~~power sat~~ energy based on		The rough cost of energy from pace is based on:

	1. 8000 hr/year		1. 8000 hr/year (90% on time)

	2. payback of ten years (ten percent of cost per year in revenue).		2. payback of capital in ten years (ten percent of cost per year in revenue).

	So the entire production cost is to be paid by 80,000 hours of revenue.		So the entire production cost is to be paid by 80,000 hours of revenue.
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	To get penny a kWh, the production cost of the power satellite cannot be more then $800 per installed kW. (Compare with current estimates for nuclear power of about $8000 per kW.)		To get penny a kWh, the production cost of the power satellite cannot be more then $800 per installed kW. (Compare with current estimates for nuclear power of about $8000 per kW.)

	The [[rectenna]] estimate is $~~100-~~200/kW based on [[power inverter\|inverter]]s costing $60/kW (same as PC power supplies which have the same parts). We can spend $600-700 per kW on parts, lifting them to [[geosynchronous orbit\|GEO]] and assembly.		The [[rectenna]] estimate is $200/kW based on [[power inverter\|inverter]]s costing $60/kW (same as PC power supplies which have the same parts). We can spend $600-700 per kW on parts, lifting them to [[geosynchronous orbit\|GEO]] and assembly.

	Allocating 1/4 to the rectenna, 1/4 to buying parts and 1/2 for lift to GEO, then the lift cost cannot exceed $200/kg for 2kg/kW power sats and $100/kg for 4kg/kW power sats.		Allocating 1/4 to the rectenna, 1/4 to buying parts and 1/2 for lift to GEO, then the lift cost cannot exceed $200/kg for 2kg/kW power sats and $100/kg for 4kg/kW power sats.

	'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])		'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])

67.170.206.231: /* Penny a kWh electricity */

2008-09-17T16:05:04Z

Penny a kWh electricity

← Older revision		Revision as of 16:05, 17 September 2008
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	In the early years, extra [[rectenna]]s will allow a premium for switching blocks of peaking power around. Later, North American off-peak power in excess of base load can be switched to Canada to make hydrogen to upgrade tar sands oil. This would raise the effective amount of oil since current extraction/upgrades burn one barrel for each 3 produced.		In the early years, extra [[rectenna]]s will allow a premium for switching blocks of peaking power around. Later, North American off-peak power in excess of base load can be switched to Canada to make hydrogen to upgrade tar sands oil. This would raise the effective amount of oil since current extraction/upgrades burn one barrel for each 3 produced.

	As the cost of power declines to a ''penny a kWh'', space-based power picks up the entire oil and gas markets. The only source that competes is installed [[hydroelectric power\|hydro]].		As the cost of power declines to a '''penny a kWh''', space-based power picks up the entire oil and gas markets. The only source that competes is installed [[hydroelectric power\|hydro]].

	==Cost of power sat energy==		==Cost of power sat energy==

67.170.206.231: /* Cost of power sats */

2008-09-14T21:03:57Z

Cost of power sats

← Older revision		Revision as of 21:03, 14 September 2008
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	As the cost of power declines to a ''penny a kWh'', space-based power picks up the entire oil and gas markets. The only source that competes is installed [[hydroelectric power\|hydro]].		As the cost of power declines to a ''penny a kWh'', space-based power picks up the entire oil and gas markets. The only source that competes is installed [[hydroelectric power\|hydro]].

	==Cost of power ~~sats~~==		==Cost of power sat energy==

	~~Penny a kWh power sells for $80/kW/year. Using a simple payoff in ten years, that requires building [[solar power satellite\|~~power sat~~]]s for $800 a kW or less. The [[rectenna]] estimate is $100-200/kW~~ based on ~~[[power inverter\|inverter]]s costing $60/kW (same as PC power supplies which have the same parts). We can spend $600-700 per kW on parts, lifting them to [[geosynchronous orbit\|GEO]] and assembly.~~		The rough cost of power sat energy based on

	~~If you assume 2kg~~/kW power ~~sats~~, ~~then we can spend~~ $~~300-350 a~~ kg to ~~buy parts~~, ~~lift them to GEO and install them~~. At ~~4kg~~ per kW, (the ~~upper end~~ of the power ~~sat mass range~~) we can spend $~~175~~ per ~~kg for~~ parts and ~~transport~~. ~~Assuming 4kg~~/kW, $75/kg for ~~parts (perhaps solar cells)~~ and ~~installation leaves~~ $100/kg for ~~transport~~.		1. 8000 hr/year

			2. payback of ten years (ten percent of cost per year in revenue).

			So the entire production cost is to be paid by 80,000 hours of revenue.

			A power sat production cost per kW is $/kW for the rectenna plus $/kW cost for the power sat parts, plus kg/kW x $/kg to GEO

			This ignores production labor even at GEO. If the construction rate is a million kW/day, a labor cost of a million dollars a day is only a dollar/kW. At around $1000 per installed kW, that's about 0.1%

			The key here is that kg/kW is just as important as lift cost.

			Energy cost (in cents/kWh) would be production cost in $/kW divided by 800.

			To get penny a kWh, the production cost of the power satellite cannot be more then $800 per installed kW. (Compare with current estimates for nuclear power of about $8000 per kW.)

			The [[rectenna]] estimate is $100-200/kW based on [[power inverter\|inverter]]s costing $60/kW (same as PC power supplies which have the same parts). We can spend $600-700 per kW on parts, lifting them to [[geosynchronous orbit\|GEO]] and assembly.

			Allocating 1/4 to the rectenna, 1/4 to buying parts and 1/2 for lift to GEO, then the lift cost cannot exceed $200/kg for 2kg/kW power sats and $100/kg for 4kg/kW power sats.

	'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])		'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])

67.170.206.231: /* Penny a kWh electricity */

2008-09-14T20:47:14Z

Penny a kWh electricity

← Older revision		Revision as of 20:47, 14 September 2008
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	In the early years, extra [[rectenna]]s will allow a premium for switching blocks of peaking power around. Later, North American off-peak power in excess of base load can be switched to Canada to make hydrogen to upgrade tar sands oil. This would raise the effective amount of oil since current extraction/upgrades burn one barrel for each 3 produced.		In the early years, extra [[rectenna]]s will allow a premium for switching blocks of peaking power around. Later, North American off-peak power in excess of base load can be switched to Canada to make hydrogen to upgrade tar sands oil. This would raise the effective amount of oil since current extraction/upgrades burn one barrel for each 3 produced.

	As the cost of power declines to a penny a kW, space-based power picks up the entire oil and gas markets. The only source that competes is installed [[hydroelectric power\|hydro]].		As the cost of power declines to a ''penny a kWh'', space-based power picks up the entire oil and gas markets. The only source that competes is installed [[hydroelectric power\|hydro]].

	==Cost of power sats==		==Cost of power sats==

Hkhenson: /* Penny a kWh electricity */

2008-09-12T23:37:13Z

Penny a kWh electricity

← Older revision		Revision as of 23:37, 12 September 2008
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	* At '''four cents''', SBSP gets most of the electrical power of the US, about 400 GW plus the rest of the world for another 1600 GW. (Half average price for power. Distributing electricity costs too.) Building 2000 GW (four hundred 5 GW power sats) takes 4-5 years. Gross income from power sales (the power satellites could also be sold) at 4 cents per kWh would be would be 2,000 GW x 4 x $80 M/yr/GW or $640 B a year, though some of this would have to be sold for less as off peak power.		* At '''four cents''', SBSP gets most of the electrical power of the US, about 400 GW plus the rest of the world for another 1600 GW. (Half average price for power. Distributing electricity costs too.) Building 2000 GW (four hundred 5 GW power sats) takes 4-5 years. Gross income from power sales (the power satellites could also be sold) at 4 cents per kWh would be would be 2,000 GW x 4 x $80 M/yr/GW or $640 B a year, though some of this would have to be sold for less as off peak power.

	In the early years, extra [[rectenna]]s will allow a premium for switching blocks of peaking power around. Later, North American off-peak power in excess of base load can be switched to Canada to make hydrogen to upgrade tar sands oil. This would raise the effective amount of oil ~~by 3 times~~ since current extraction/upgrades burn ~~two barrels~~ for each ~~one~~ produced.		In the early years, extra [[rectenna]]s will allow a premium for switching blocks of peaking power around. Later, North American off-peak power in excess of base load can be switched to Canada to make hydrogen to upgrade tar sands oil. This would raise the effective amount of oil since current extraction/upgrades burn one barrel for each 3 produced.

	As the cost of power declines to a penny a kW, space-based power picks up the entire oil and gas markets. The only source that competes is installed [[hydroelectric power\|hydro]].		As the cost of power declines to a penny a kW, space-based power picks up the entire oil and gas markets. The only source that competes is installed [[hydroelectric power\|hydro]].

Woozle: Penny a kW moved to Penny a kWh: Apparently the title which was intended

2008-08-31T16:15:52Z

Penny a kW moved to Penny a kWh: Apparently the title which was intended

← Older revision	Revision as of 16:15, 31 August 2008
(No difference)

Hkhenson: /* Cost of power sats */

2008-08-31T15:39:11Z

Cost of power sats

← Older revision		Revision as of 15:39, 31 August 2008
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	==Cost of power sats==		==Cost of power sats==

	Penny a kWh power sells for $80/kW/year. Using a simple payoff in ten years, that requires building [[solar power satellite\|power sat]]s for $800 a kW or less. The [[rectenna]] estimate is $100-200/kW based on [[power inverter\|inverter]]s costing $60/kW (same as PC power supplies). We can spend $600-700 per kW on parts, lifting them to [[geosynchronous orbit\|GEO]] and assembly.		Penny a kWh power sells for $80/kW/year. Using a simple payoff in ten years, that requires building [[solar power satellite\|power sat]]s for $800 a kW or less. The [[rectenna]] estimate is $100-200/kW based on [[power inverter\|inverter]]s costing $60/kW (same as PC power supplies which have the same parts). We can spend $600-700 per kW on parts, lifting them to [[geosynchronous orbit\|GEO]] and assembly.

	If you assume 2kg/kW power sats, then we can spend $300-350 a kg to buy parts, lift them to GEO and install them. At 4kg per kW, (the upper end of the power sat mass range) we can spend $175 per kg for parts and transport. Assuming 4kg/kW, $75/kg for parts (perhaps solar cells) and installation leaves $100/kg for transport.		If you assume 2kg/kW power sats, then we can spend $300-350 a kg to buy parts, lift them to GEO and install them. At 4kg per kW, (the upper end of the power sat mass range) we can spend $175 per kg for parts and transport. Assuming 4kg/kW, $75/kg for parts (perhaps solar cells) and installation leaves $100/kg for transport.

	'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])		'''Next''': [[Hundred dollars a kg]] (cost to [[geosynchronous orbit\|GEO]])