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2009 Vol.42 No.2

IHI ENGINEERING REVIEW

2009 Vol.42 No.2

1. Development of High-Efficiency Centrifugal Compressor for Turbo Chiller

TAMAKI Hideaki, KAWAKUBO Tomoki, TSUKAMOTO Minoru, NUMAKURA Ryusuke

A high efficiency 2-stage compressor was developed for large capacity air conditioning equipment. The goal of COP (Coefficient of Performance) of the turbo chiller was more than 6.0, COP of 6.4 for the chiller size of more than 1 000 USRt, which is the highest COP in turbo chillers. In order to satisfy COP of more than 6.0, it was required to develop the new centrifugal compressors the efficiency of which was much higher than conventional centrifugal compressors’ efficiency. CFD was successfully applied to the new compressor designing. The turbo chiller with the new 2-stage compressor achieved COP of 6.3 for the chiller size of up to 700 USRt. It is expected that the turbo chiller with the new 2-stage compressor will satisfy the target performance. The aerodynamic design of the 2-stage compressor is explained with a brief introduction of centrifugal compressors.

2. Development of Material Control System for Next Generation Liquid Crystal Glass

HASEGAWA Fumio, OKAJIMA Kazumichi, SHIDA Michinori, MURAMATSU Yuya, NAKAMA Mitsuaki

The material control system ( MCS ) that controls the transportation between process equipment and stockers is indispensable to improve productivity because the process flow is complex and production is high in the LCD production line. It is difficult to transfer the LCD glass with the cassette transfer method, as the LCD glass substrate is becoming larger. Therefore, a single substrate transfer method to transport individual LCD glass substrate is needed. IHI has developed the MCS with optimum cassette transfer function and single substrate transfer function for the TFT array process of the LCD glass production line. The system outline of the developed MCS and the main features are introduced.

3. Development of the “Micro Combustor”

TAKAHASHI Katsuyoshi, KATO Soichiro, MIZUTANI Taku, SUDA Toshiyuki

Small heat regeneration combustors have been developed for use as heat sources by applying excess enthalpy combustion technology. Two types of combustors have been manufactured for evaluation, a disk-type combustor and a tubular one. By tuning the surface-to-volume ratio, the CO emission of the disk-type combustor could be reduced to less than 45 ppm with high energy efficiency. For the tubular combustor, which has been operated in water, high energy efficiencies and CO concentrations below 35 ppm were confirmed. The tubular combustor also proved commercial levels of combustion properties in a test apparatus ( fryer ) built for kitchens. The combustor has attracted favorable attention at various fairs and exhibition events.

4. Development for Industrial Robotics Applications

ONO Kazuya, HAYASHI Toshihiro, FUJII Masakazu, SHIBASAKI Nobuhiro, SONEHARA Mitsuharu

Factory automation is currently expected to improve productivity, quality and/or safety in the production industry, especially for functions depending on workers. This report introduces IHI’s R&D activities to allow industrial robots to work in bin picking, payload handling, assembly, and similar operations. The R&D activities integrate IHI’s advanced technologies; such as sensing and measurement technology, control technology, and mechanics technology, to automate operations not possible for conventional robots.

5. Inactivation of Influenza Virus by Ozone Gas

TANAKA Hiroshi, SAKURAI Miei, ISHII Kousuke, MATSUZAWA Yoshiaki

More than 99.99% of influenza A virus particles attached to a plastic carrier were inactivated by exposure to 10 ppm ( V/V ) - ozone gas for 210 min at 23 to 29℃and a relative humidity of 64 to 65%. When the virus was exposed to 20 ppm ( V/V ) - ozone gas for 150 min, more than 99.999% was inactivated. In contrast, the virus remained active after 10 hours under similar conditions without ozone gas. These data suggest that office disinfection against influenza viruses might be accomplished by ozone gas fumigation during night-time hours.

6. Biopharmaceutical Manufacturing Facility

KAMEKURA Koichi, MIZUNUMA Takato, YUMIZA Naoki, SUGAYA Kazuo

Biopharmaceutical shows promise as major part of pharmaceutical products since it is applicable to a wide range of diseases such as cancer, rheumatism, and influenza vaccination with high pharmaceutical efficacy but little side effect. Bioplant engineering is one of main business unit of IPEC. Therefore, IPEC has been conducting many development projects in the field. This report gives the outline of biopharmaceutical manufacturing process, features of facilities, key points of the scale up, and design procedures of bioreactor and major purification equipment. In addition, IPEC’s remarkable ability in optimization of bioprocess using pilot scale facilities is introduced.

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