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Tokyo Rinkai Heat Supply Corporation

Upgrade process examined closely to guarantee a reliable heat supply

DSTJ™3000 Ace+ differential pressure transmitters measure the pressure of the main pipes for heat and chilled water.

Tokyo Rinkai Heat Supply Corporation asked several companies, two of which were suppliers of the existing systems, to submit estimates and upgrade plans. After a comprehensive assessment of the plans in terms of the technological skill and past performance of the company, cost, maintenance system, etc., Azbil Corporation, the supplier of the former system at the Ariake Minami plant, was selected as the partner for the new project.

“We were favorably impressed by Azbil’s past performance, such as its cordial handling of maintenance work at our plant, and when thinking about future operations, we felt comfortable with Azbil’s plan, which stated their intent to hear operators’ requests at any time and continually incorporate them into the system,” says Mr. Yamaguchi.

At the start of the project, Azbil conducted a survey to gain insight into the opinions and requests of all operators working at the three plants. Incorporating as many of the requests as possible, Azbil constructed a system which was ideal for the sites, based on a highly dependable open automation system called Industrial-DEO™, and including a utility optimization software package for power plants with heat source equipment in order to ensure optimal operation. One of the important challenges for Azbil was to find a way to make efficient progress in the system integration work while maintaining the reliability of the heat supply.

“There are hospitals in the area we serve, so we can never interrupt the heat supply. Upgrading a system while it is running a plant is difficult and requires caution. We spent one year in discussions over the selection of the measurement and control system and the construction methods necessary to integrate the systems, repeatedly checking and adjusting fundamental matters before we finally settled on the details of the upgrade. The construction period was planned to be one year per plant. We made a detailed plan for five-year construction starting from the Aomi Minami plant, and then continuing to Daiba, Ariake Minami, and finally the headquarters in that order,” says Mr. Hatabe.

Right: A turbo chiller uses electricity to produce chilled water.
Left: A MagneW™3000 FLEX+ electromagnetic flowmeter measures flow rate while a DSTJ3000 Ace+ transmitter measures pressure.

* Industrial-DEO, DSTJ, and MagneW are trademarks of Azbil Corporation.

These case studies were published in the 2017 Vol.3 issue of the azbil Group's corporate magazine, azbil.