| US 7,602,085 B2 | ||
| Coal energy utilization system having superconducting power transmission | ||
| Kuniaki Kawamura, Koto-ku (Japan); Masamitsu Ikeuchi, Koto-ku (Japan); and Akito Machida, Koto-ku (Japan) | ||
| Assigned to Mayekawa Mfg. Co., Ltd., (Japan) | ||
| Filed on Aug. 03, 2005, as Appl. No. 11/195,853. | ||
| Application 11/195853 is a continuation of application No. PCT/JP2004/004685, filed on Mar. 31, 2004. | ||
| Claims priority of application No. 2003-093954 (JP), filed on Mar. 31, 2003. | ||
| Prior Publication US 2006/0056120 A1, Mar. 16, 2006 | ||
| Int. Cl. G05F 3/06 (2006.01) | ||
| U.S. Cl. 307—147 [307/151] | 3 Claims |
| 1. A system for utilizing coal energy located at a first location corresponding to a coal source to supply enemy to a demand
end located at a second location separate from the first location, the system comprising:
means for thermal power generation located at the first location that converts coal energy to electric energy by thermal power
generation;
an alternating current load located at the demand end; and
means for electric power transmission that transmits electric enemy from the means for thermal power generation to the alternating
current load;
wherein the means for electric power transmission includes a combination of a super conductive power transmitting system that
transmits direct current electricity utilizing at least one super conductive power transmitting cable, and a conventional
alternating current power distribution network operating at normal temperatures;
wherein electric energy is transmitted to the demand end through the alternating current power distribution network by converting
the direct current transmitted by the super conductive power transmitting system to alternating current at a connecting end
of the alternating current power distribution network where the super conductive power transmitting system is connected to
the alternating power distribution network;
wherein the super conductive power transmitting system includes first current conversion means for converting alternating
current to direct current provided at an input side connecting end of the super conductive power transmitting system, second
current conversion means for converting direct current to alternating current provided at a demand side connecting end of
the super conductive power transmitting system, a super conducting cable for transmitting direct current provided therebetween,
and a power load adjusting means for regulating an appropriate power transmitting amount of the super conductive power transmitting
system in collaboration with the alternating current power distribution network;
wherein a cooling energy base is provided at installation sites of the first and second current conversion means, and in an
installation site of the power load adjusting means, the cooling enemy base including a low temperature refrigerator that
provides a cooling agent that cools the super conductive transmitting cable, a cooling agent storage tank that stores the
cooling agent, and a supplying pump disposed at the storage tank;
wherein the low temperature refrigerator utilizes carbon dioxide as a refrigerant to cool the cooling agent, and wherein the
low temperature refrigerator also functions as a heat supplying station that supplies heat from a condenser; and
wherein the cooling agent comprises slush nitrogen that includes a mixture of fine particles of solid nitrogen and liquid
nitrogen.
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