Mayekawa Mfg. Co., Ltd.

Masamitsu Ikeuchi

Akito Machida

Kouichi Matsuo

Kuniaki Kawamura

Kazuhiro Hattori

Hideharu Yanagi

A system for utilizing coal energy includes a thermal power generator near a coal field area that converts coal energy of the coal field area located remotely from a demand end to electric energy. It also includes an alternating current load at a demand end side, an alternating current power distribution network, and an electric power transmission mechanism that transmit electric energy from the thermal power generator to the power distribution network. The electric power transmission mechanism is a combination of super conductive power transmitting system that transmit direct current electricity with small transmission loss utilizing super conductive power transmitting cables and a conventional power distribution network operating at ambient temperatures.

Coal energy utilization system having superconducting power transmission

An apparatus for producing a slush fluid wherein a liquid and solid particles are mixed together, comprising product tank () for storing the slush fluid () in its saturated condition; liquid nitrogen supply nozzle () provided at an upper part of the product tank (); and compressor () for evacuating the interior of the product tank, which apparatus is adapted to spray a liquid in microparticulate form through the liquid nitrogen supply nozzle () into the product tank evacuated by the compressor () and to solidify the liquid particles by evaporative latent heat, thereby forming solid nitrogen (). Preferably, the apparatus has a circulatory system for circulating the gas discharged from the product tank () by the compressor () to the liquid nitrogen supply nozzle (), which circulatory system includes heat exchangers () for heating the discharged gas to ordinary temperature by heat exchange; the compressor () for compressing the heated gas to thereby produce high-pressure ordinary-temperature gas; the heat exchangers () for cooling the high-pressure ordinary-temperature gas to thereby produce high-pressure low-temperature gas; and auxiliary chilling refrigerator () and heat exchanger () for chilling the high-pressure low-temperature gas to thereby condense the same.

Process for producing slush fluid and apparatus therefor

Liquid nitrogen is filled in a low temperature vessel; an ejector that sucks liquid nitrogen by blowing a cooling agent (liquid or gas) such as low temperature helium gas or liquid helium of pressure higher than in the space within the vessel is disposed in the vessel; the liquid nitrogen blown with the cooling agent is cooled by the cooling agent to become fine particles of solid nitrogen which fall down; and gas in a space of the vessel is discharged out of the vessel so as to maintain the pressure of the space higher than the atmospheric pressure. A gaseous phase of liquid nitrogen in an adiabatic vessel is depressurized to vaporize nitrogen in a liquid phase so that the temperature of the nitrogen reaches the triple point of nitrogen by lowering the temperature to thereby produce solid nitrogen by keeping the temperature at the triple point, and that the produced solid nitrogen is transformed into slush by stirring the content of the adiabatic vessel. A super conductive body formed of a material exhibiting a state of super conductance in the vicinity of the temperature of liquid nitrogen or of the temperature where liquid nitrogen and solid nitrogen coexist can be cooled by immersing the body in slush nitrogen held in an adiabatic vessel or flowing in an adiabatic pipe.

Apparatus and method for cooling super conductive body

Liquid nitrogen is filled in a low temperature vessel; an ejector that sucks liquid nitrogen by blowing a cooling agent (liquid or gas) such as low temperature helium gas or liquid helium of pressure higher than in the space within the vessel is disposed in the vessel; the liquid nitrogen blown with the cooling agent is cooled by the cooling agent to become fine particles of solid nitrogen which fall down; and gas in a space of the vessel is discharged out of the vessel so as to maintain the pressure of the space higher than the atmospheric pressure. A gaseous phase of liquid nitrogen in an adiabatic vessel is depressurized to vaporize nitrogen in a liquid phase so that a temperature of the nitrogen is reached to the triple point of nitrogen by lowering temperature thereby and solid nitrogen is produced by keeping at the triple point, and that the produced solid nitrogen is transformed into slush by stirring the content of the adiabatic vessel. In a method for cooling a super conductive body in which a material showing a state of super conductance in the vicinity of the temperature of liquid nitrogen or of the temperature liquid nitrogen and solid nitrogen coexist is used, a method for cooling a super conductive body characterized in that the super conductive body is immersed in slush nitrogen held in an adiabatic vessel, and that the body is contacted with slush nitrogen to cool.

Growing community of inventors

Koto-ku, Japan

Masamitsu Ikeuchi