US3697665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power line system and method for the transmission of electric energy over low temperature electric conductors
Assignee: Forschungszentrum Jülich
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Filing: 1970-12-15
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Granted: 1972-10-10
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Expires: 1990-12-15
Abstract
Abstract In a power line system for transmitting electric energy over electric conductors cooled by a coolant flowing in conduits associated with the conductors which, in turn, are surrounded by a radiation shield cooled by a coolant flowing in conduits associated with the radiation shield; the flow rate of the coolant through any cross-sectional area laid across all the first-named conduits, as well as the flow rate of the coolant through any cross-sectional area laid across all the second-named conduits is unequalized. Further, the power line system includes refrigeration machines to set to the optimal operating temperatures the coolant associated with the conductors and the coolant associated with the radiation shield.
Inventors
- 👤 Conrad Doose
- 👤 Wolfgang Sassin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:04
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/34; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H02J; H02J1/00; H02J1/06; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/884; Y10S505/885; Y10S505/886
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
216 words
A method of circulating coolant in a power line system wherein electric energy is transmitted over cooled electric conductors, said power line system includes coolant conduits associated with said electric conductors for cooling the latter and coolant conduits associated with a radiation shield for cooling the latter, a vacuum casing containing said conduits, said electric conductors and said radiation shield, with said power line system there are associated refrigerating machines having compressor means, expansion means and heat exchanger means, comprising the steps of A. maintaining unequalized the flow rate of the coolant through any cross-sectional area laid across the totality of the conduits for cooling the electric conductors, B. maintaining unequalized the flow rate of the coolant through any cross-sectional area laid across the totality of the conduits for cooling the radiation shield, C. increasing to the temperature value necessary for the cooling said radiation shield, the temperature of a partial stream of the coolant subsequent to its passing through at least one portion of the power line system for cooling the electric conductors, and D. decreasing to the temperature value necessary for the cooling said electric conductors, the temperature of a partial stream of the coolant subsequent to its passing through at least one portion of the power line system for cooling the radiation shield.
Claim 2
Independent Claim
216 words
A method of circulating coolant in a power line system wherein electric energy is transmitted over cooled electric conductors, said power line system includes coolant conduits associated with said electric conductors for cooling the latter and coolant conduits associated with a radiation shield for cooling the latter, a vacuum casing containing said conduits, said electric conductors and said radiation shield, with said power line system there are associated refrigerating machines having compressor means, expansion means and heat exchanger means, comprising the steps of A. maintaining unequalized the flow rate of the coolant through any cross-sectional area laid across the totality of the conduits for cooling the electric conductors, B. maintaining unequalized the flow rate of the coolant through any cross-sectional area laid across the totality of the conduits for cooling the radiation shield, C. increasing to the temperature value necessary for the cooling said radiation shield, the temperature of a partial stream of the coolant subsequent to its passing through at least one portion of the power line system for cooling the electric conductors, and D. decreasing to the temperature value necessary for the cooling said electric conductors, the temperature of a partial stream of the coolant subsequent to its passing through at least one portion of the power line system for cooling the radiation shield.
Claim 3
Dependent Claim
86 words
A method as defined in claim 1, including the step of admitting a partial stream of a coolant emerging from a refrigerating machine to all those conduits associated with the electric conductors and to all those conduits associated with the radiation shield which form a portion of said power line system that joins a refrigerating machine in the planned direction of coolant flow and admitting both last-named partial streams to the downstream successive refrigerating machine after flowing through said last-named portion of the power line system.
Claim 4
Dependent Claim
173 words
A method as defined in claim 1, including the following steps: A. admitting the coolant, emerging as partial streams, both to one part of those conduits associated with the electric conductors and to one part of those conduits associated with the radiation shield which form the ends of portions of said power line system; said ends joining a refrigerating machine, B. subsequently directing said coolant to those downstream adjacent refrigerating machines which are connected with the other ends of said last-named portions of said power line system; and C. admitting a partial stream of the coolant, emerging in partial streams from the adjacent refrigerating machines, both to the remaining part of those conduits associated with the electric conductors and to the remaining part of those conduits associated with the radiation shield which form portions of the power line system; the partial streams of the last-named step (B) return in a counterflow with respect to the partial streams of the last-named step (A) to the refrigerating machine from which emerge the last-named partial streams.
Claim 5
Dependent Claim
28 words
A method as defined in claim 2, directing the coolant, with the absence of return flow, to successive downstream refrigerating machines in a closed loop power line system.
Claim 6
Dependent Claim
88 words
A method as defined in claim 3, including the following steps: A. providing, between adjacent refrigerating machines, a circulating flow of the partial coolant streams passing through those portions of the power line system which extend to and from the refrigerating machines and which interconnecT the same and B. giving the coolant flowing through conduits associated with the electric conductors and the coolant flowing through conduits associated with the radiation shield the required operating temperatures in the refrigerating machines for cooling the electric conductors and the radiation shield.
Claim 7
Dependent Claim
185 words
A method as defined in claim 1, including the following steps: A. admitting a first partial coolant stream with a temperature T1 from one of the refrigerating machines into conduits associated with the electric conductors, B. admitting a second partial coolant stream with a temperature T3 from the same refrigerating machine into conduits associated with the radiation shield; the temperature T3 is higher than the temperature T1, C. admitting said first partial coolant stream with a temperature T2 to the downstream adjacent refrigerating machine subsequent to its passing through the conduits associated with the electric conductors; the temperature T2 is higher than the temperature T1, D. admitting said second partial coolant stream with a temperature T4 to the downstream adjacent refrigerating machine subsequent to its passing through the conduits associated with the radiation shield; the temperature T4 is higher than the temperature T3, E. directing in a heat exchanging counterflow the partial coolant streams in the heat exchangers of the last-named refrigerating machine, and F. combining the entering, partial coolant streams after the colder partial stream is warmed to a temperature T4 in step (E).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |