Ebara Corporation

Other

Yuzo Narasaki

Ichiro Kamiya

Tetsuo Kuroda

Hidemitsu Otsuka

Haruki Sato

Manabu Morishita

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

A desalination apparatus and method utilizing solar energy provided with a solar heat collector for heating a heating medium with solar energy, a heat exchanger cooperating with an evaporation can so as to subject the heating medium and raw water in the evaporation can to heat exchange and generate water vapor therein, a condenser cooperating with a raw water tank so as to receive the vapor from the evaporation can, cool the vapor by subjecting the vapor and raw water in the raw water tank to heat exchange and obtain distilled water.

Growing community of inventors

Kanagawa, Japan

Yuzo Narasaki