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MHI, Toho Gas Offer World's Highest Efficiency Gas Cogeneration

Friday, March 20, 2015

Tokyo- (PanOrient News) Mitsubishi Heavy Industries, Ltd. (MHI) and Toho Gas Co., Ltd. have jointly developed a new 450-kilowatt (kW) gas cogeneration system which will be launched into the Japanese market by both companies on April 1.

The newly developed gas cogeneration system, based on a previously introduced 380kW system, achieves an outstanding power output of 450kW, made possible through optimization of combustion and the adoption of components that improved efficiency. Generating efficiency is 42.0%, the world's highest level in the 400kW class, and overall efficiency is a strong 81.5%.1.

In addition to these achievements in power output and generating efficiency, both initial costs and running costs were lowered due to the elimination of the need for denitrification equipment. These benefits will enable a faster investment return than with the 380kW system. In addition, the size of the main unit has been trimmed thus requiring a 20% reduction in installation space.

Following the Great East Japan Earthquake, customer interest in gas cogeneration systems rose due to their extremely efficient use of energy, their contributions to achieving power security and power savings that matched business continuity plans (BCP). Customers are also looking for higher performance levels.

MHI and Toho Gas intend to propose the new 450kW gas cogeneration system for adoption in hospitals, commercial facilities, office buildings, factories, etc. as a way of promoting the further adoption of these efficient systems, while simultaneously making positive contributions to saving energy and easing burdens on the environment.

The main features include the world's highest level of generating efficiency in the 400kW class, or 42.0%, according to a press release from MHI. It said the newly developed 450kW gas engine achieves close to 20% higher output and the highest level, 42.0% of generating efficiency in its class, possible through optimized combustion and the adoption of a water-cooled turbocharger and high-efficiency generator. In addition the intercooler, which cools the fuel-air mixture and raises air density, has been upgraded from the earlier one-stage type to a two-stage configuration. By recovering heat from the first stage, the two-stage intercooler has increased overall efficiency to 81.5%.

Other features are the installation space saving of 20% and a faster return on investment than earlier systems.

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