Sasakura Engineering Co., Ltd.

International Business Machines Corporation

Taiyo Corporation

Masaaki Imai

Yoshinori Inoue

Roger R Schmidt

Takeshi Tsukamoto

Iwao Sawada

Jyunji Takayoshi

Masayoshi Funatsu

Minoru Onai

Minoru Uemura

Hayato Fujii

Hiroaki Hayase

A cooling apparatus and method are provided for facilitating cooling of an electronic apparatus that includes a semiconductor element. The cooling apparatus includes an evaporator containing a coolant and evaporating the coolant under a reduced pressure lower than an ambient pressure to generate a chilled coolant, a condenser regenerating the coolant from a vapor of the coolant and being fluid-communicated with the evaporator through a bypass line, and a circulating pump and a line supplying the chilled coolant to a heat exchange area of the electronic apparatus to conduct a heat exchange with an air flow passing though the semiconductor element at a hot side of the electronic apparatus and returning the coolant after the heat exchange to the condenser.

Facilitating cooling of an electronics rack employing water vapor compression system

In an apparatus comprising: an evaporatorfor boiling and evaporating a cold/heat evaporable liquid under a reduced pressure; a condenserfor condensing vapor; a cold/heat indirect heat exchangerat a loadside; a cooling heat exchangerusing the air; cold-heat circulation meansandfor circulating a cold/heat evaporable liquid in the evaporator to the cold/heat indirect heat exchanger; cooling circulation meansandfor circulating a cooling evaporable liquid in the condenser to the cooling heat exchanger; and a vapor compressorprovided in a vapor ductextending from the evaporator to the condenser, a running cost is reduced when a temperature at the condenser side becomes lower than a temperature at the evaporator side due to a drop in air temperature, without a rise in a temperature of the cold/heat evaporable liquid. The vapor ductis provided with a bypass vapor pathfor bypassing the vapor compressor. The bypass vapor path is provided with an on-off valve. When a temperature at the condenser side becomes lower than a temperature at the evaporator side, the vapor compressor is shut down and the on-off valve is opened.

Liquid evaporation cooling apparatus

This disclosure relates to a reverse osmosis apparatus comprising a reciprocating pump or pumps including a first cylinder chamber and a second cylinder chamber which is smaller in volume than the first chamber due to a piston rod extending through the second cylinder chamber, a feed conduit connected to the first cylinder chamber for feeding fluid thereto through a first one-way flow piping for fluid flow thereto, a reverse osmosis membrane module including an inlet and an outlet which collects permeate fluid, a second one-way flow piping connecting the first cylinder chamber with the reverse osmosis membrane module inlet for fluid flow to the inlet, a selector connecting the second cylinder chamber with the reverse osmosis membrane module outlet, and a drain conduit connected to the selector for draining concentrated fluid from the second cylinder chamber. The selector has a first position allowing the reverse osmosis membrane module outlet and the second cylinder chamber to communicate together and isolating the drain conduit. The selector also has a second position blocking the outlet allowing the second cylinder chamber and the drain conduit to communicate together. The selector is connected in pressure communication with the cylinder chambers to shift to the first position when the pressure in the first cylinder chamber increases, and to the second position when the pressure in the second cylinder chamber increases.

Concentrating apparatus with reverse osmosis membrane

This disclosure relates to apparatus comprising a reverse osmosis membrane module, a reciprocating pump and a double-acting hydraulic cylinder. The pump includes a piston defining on its opposite sides a first cylinder chamber and a second cylinder chamber which has a smaller cross-sectional area than the first chamber. The first chamber connects with a feed fluid supply conduit provided with a feed valve which opens when the first chamber expands. The membrane module includes an inlet and an outlet. The inlet connects with the first cylinder chamber when the first cylinder chamber contracts in volume, and the outlet connects with the second cylinder chamber through a selector connecting with a concentrate fluid drain conduit. The selector has a first position where the second chamber and the outlet are interconnected and the drain conduit is disconnected from the second chamber and the outlet, and a second position where the second chamber and the drain conduit are interconnected and the outlet is disconnected from the second chamber and the drain conduit. The hydraulic cylinder includes a piston coupled by a rod to the pump piston and defining two chambers on its opposite sides, which are supplied alternately with hydraulic pressure to reciprocate the pistons. The selector is coupled to an actuator connecting with the hydraulic cylinder. The actuator is responsive to the pressure in one of the hydraulic cylinder chambers to shift the selector to the first position immediately before the first cylinder chamber starts to contract, and to the pressure in the other hydraulic cylinder chamber to shift the selector to the second position immediately before the first chamber starts to expand.

Growing community of inventors

Hyogo, Japan

Masaaki Imai