Yanmar Co., Ltd.

Taisuke Ono

Takashi Matsuura

Toshihisa Kanda

Yuki Tokuoka

Takayuki Iguchi

Masafumi Shinomiya

Ryousuke Hinata

Katsumi Kiyokawa

Touha Den

Disclosed are power generation apparatuses. An exemplary power generation apparatus () is configured such that water vapor generated in a steam generator () is supplied to a scroll expander () to drive the scroll expander, wherein: a condensation device () is arranged in a discharge path () downstream of the scroll expander, the condensation device being configured to mix water vapor having passed through the scroll expander directly with cooling water to condense the water vapor; and the condensation device includes a control unit () that performs a control of adjusting the amount of cooling water supply so as to obtain condensed water having a predetermined temperature.

Power generation apparatus

A waste heat recovery system for a vessel for supplying to a plurality of scroll expanders which are connected in parallel to one another, steam generated by a heat exchanger using waste heat from a main machine as a heat source, may include gate valves corresponding to respective scroll expanders and an electronic controller which controls the number of the scroll expanders which drives based on flow volume of the steam by opening or closing of the gate valves.

Waste heat recovery system for vessel

A waste heat recovery Rankine cycle system has a first Rankine cycle operated with a first working medium and a second Rankine cycle operated with a second working medium having a lower boiling point than the first working medium, the first Rankine cycle has a second scroll type fluid machine as an expander, a second electric generator, a second condenser, a condensing tank, a second condensing pump, a gas-liquid separation device, a heat exchanger, a low rate regulation valve, and a control device. This structure can drive a generator by a waste heat not only in a first Rankine cycle but also in a second Rankine cycle.

Waste heat recovery ranking cycle system

A method for controlling an exhaust gas purification deviceequipped with branch exhaust passagesandconnected to an exhaust passageon the engine side; a shutoff valvecapable of shutting off exhaust gas at the exhaust inletsandof the branch exhaust passagesand; a nitrogen oxide adsorbing material, disposed inside each of the branch exhaust passagesor, temporarily adsorbing nitrogen oxides in an excess air atmosphere, and detaching the adsorbed nitrogen oxides in a rising temperature atmosphere or a reducing atmosphere; a first combustion device, disposed on the exhaust upstream side of the nitrogen oxide adsorbing materialinside each of the branch exhaust passagesor, having an air nozzle, and changing the air supplied from the air nozzleinto the rising temperature atmosphere or the reducing atmosphere; and a second combustion device, disposed on the exhaust downstream side of the nitrogen oxide adsorbing materialinside each of the branch exhaust passagesorand including an air nozzle, a fuel nozzleand an ignition nozzle, wherein the ratio of fuel and air supplied from the first combustion deviceis controlled within the range of 0.6&#x3c;&#x3bb;&#x3c;1.0, where &#x3bb;is an excess air ratio.

Exhaust gas purification device

Disclosed is a method for controlling an exhaust gas purification device, wherein the regeneration operation includes main regeneration operation for detaching the nitrogen oxides adsorbed onto the nitrogen oxide adsorbing material, the method comprising: operating the first combustion device and the second combustion device while the exhaust gas is prevented from flowing into the branch exhaust passage subjected to the regeneration operation by the switching of a changeover valve during the regeneration operation; and decreasing the flow rate of the first mixture gas as the stage of the main regeneration operation advances.

Method for controlling exhaust gas purification device

An exhaust gas purification deviceis equipped with a plurality of branch exhaust passagesand; a junction exhaust passage; a shutoff valveswitching between allowing and shutting off the flow of exhaust gas to the respective branch exhaust passagesand; a nitrogen oxide adsorbing materialtemporarily adsorbing nitrogen oxides in an excess air atmosphere and detaching the adsorbed nitrogen oxides in a reducing atmosphere and reducing the nitrogen oxides in the reducing atmosphere to produce ammonia; a first combustion device, disposed on the exhaust upstream side of the nitrogen oxide adsorbing materialand having an air supply unit, changing the air supplied from the air supply unit into the reducing atmosphere; and a selective reduction catalyst, provided inside the junction exhaust passage, selectively reducing the nitrogen oxides by using ammonia as a reducing agent.

The present invention provides an exhaust gas purifier capable of appropriately purifying harmful components discharged even from an internal combustion engine or a combustion instrument operated mainly in excess-air conditions. Particularly, the exhaust gas purifier is capable of appropriately removing nitrogen oxides, particulate matters including soot, etc. and in addition, capable of maintaining its purification capability without reduction. the exhaust gas purifier has, in the exhaust passage () of an internal combustion engine (), a nitrogen oxide adsorbent () for temporarily adsorbing nitrogen oxides and desorbing the adsorbed nitrogen oxides in a temperature-increased environment or a reducing environment, an adsorbed substance desorbing means () being disposed on an exhaust gas upstream side of the nitrogen oxide adsorbent (), the adsorbed substance desorbing means () heating the exhaust gas or air or converting the exhaust gas or air into a reducing atmosphere, a combustion apparatus () being disposed on an exhaust gas downstream side of the nitrogen oxide adsorbent (), the combustion apparatus () including air supply means (), fuel supply means (), and ignition means (); and a filter apparatus () being disposed on an exhaust gas downstream side of the combustion apparatus () to be able to capture a particulate substance contained in the exhaust gas.

Exhaust gas purifier

It is intended to efficiently remove particulate substances, such as NOx and soot, without poisoning by Sox, etc. from dilute-combustion effecting internal combustion engines, combustion equipment, etc. There is provided an exhaust gas purifier to be installed in exhaust passage () of internal combustion engine () or the like, comprising, disposed in the exhaust passage (), NOx adsorbent () capable of temporarily adsorbing nitrogen oxides even in an atmosphere of excess air and capable of desorbing the adsorbed nitrogen oxides upon temperature rise or in a reducing atmosphere, adsorbed substance desorbing means () arranged on an exhaust upstream side as compared with the NOx adsorbent () and capable of heating the exhaust or converting it to a reducing atmosphere, and combustion device () arranged on an exhaust downstream side as compared with the NOx adsorbent () and composed of fuel nozzle () and igniter (). In normal operation, the NOx adsorbent () adsorbs NOx contained in exhaust gas. When the amount of NOx adsorbed increases to saturation, the adsorbed substance desorbing means () and the combustion device () are operated to thereby desorb the NOx, which is burned off in combustion over-rich combustion region (X) of the combustion device ().

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Osaka, Japan

Taisuke Ono