Ebara Corporation

Tetsuo Kuroda

Ichiro Kamiya

Yuzo Narasaki

Norio Takahashi

Matsuho Miyasaka

Hidemitsu Otsuka

A desalination apparatus capable of obtaining fresh water stably at low cost by utilizing low-temperature waste, wherein the desalination apparatus including a heat exchanger cooperating with an evaporation can so as to subject a low-temperature waste heat and raw water in the evaporation can to heat exchange and generate water vapor in the evaporation can ; a condenser cooperating with a raw water tank so as to receive the water vapor from the evaporation can , cool the water vapor by subjecting the water vapor and raw water in the raw water tank to heat exchange and obtain distilled water ; a distilled water tank for storing the distilled water ; vacuum means for evacuating the evaporation can and depressurizing the inside thereof so as to promote generation of water vapor in the evaporation can ; and raw water supply means for supplying raw water to the evaporation can.

Desalination method and desalination apparatus

A method and an apparatus for measuring the moisture content of the soil in order to enable pF value based control of irrigation in cultivation on the soil, as well as a method and an apparatus which use the first-mentioned method and apparatus to enable pF value based control of irrigation. To attain these objects, the invention provides a method for measuring the pF value (soil moisture tension) of the soil, comprising the steps of (a) preliminarily determining the correlation between pF value and volumetric water content of the soil to be measured, (b) measuring the volumetric water content of the soil, and (c) converting the value of the volumetric soil water content of the soil measured in the above step (b) to the corresponding pF value on the basis of the correlation between pF value and volumetric water content predetermined in the above step (a). Also a method and an apparatus for controlling the irrigation of the soil based on the measurement of the pF value by the method.

Soil pf value measuring method, and irrigation control method and irrigation control device

An object of the present invention is to provide a method for forming an initial anticorrosive film in an absorption chiller-heater, by selecting optimal conditions of absorbent solution, steel material surface and film-forming operation for forming a good initial anticorrosive film. In the process for forming an initial anticorrosion film in an absorption chiller-heater having steel parts and containing an absorbent solution comprising lithium bromide as its main component and containing a lithium molybdate corrosion inhibitor according to the present invention, the main characteristics are that at least part of the steel parts of the absorption chiller-heater contacting with an absorbent solution at a temperature of higher than 100.degree. C. include a bare metal surface having an arithmetic mean surface roughness of not more than 1.0 .mu.m; the absorbent solution supplied comprises lithium bromide as its main component and contains a lithium molybdate corrosion inhibitor dissolved in the solution at a level of 450-750 ppm; and that an initial anticorrosion film forming operation is conducted at a condition such that amount of the lithium molybdate dissolved in the absorbent solution is maintained at not less than 200 ppm.

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Kanagawa, Japan

Tetsuo Kuroda