Open Rack Type LNG Vaporizer(ORV)
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NO.1 How this technology helps you

Customers considering installing new vaporizers or revamping existing equipment can now take advantage of the most reliable and high performing ORV provided by Tokyo Gas at a considerably lower construction cost*2 than before.

The ORV is also the world’s most economical for lifecycle costs including maintenance. Sumitomo Precision Products and Tokyo Gas have been jointly developing this technology.

Below is a bird’s-eye view of the ORV and shows an outline of the panel composed of heat transfer tubes.

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NO.2 Features
1.Optimal design technology reduces construction costs

In order to enhance thermal efficiency, Tokyo Gas revised design methods wherein conventional trials were used as a base. The newly developed optimal design technology enabled to determine the most suitable shape of heat transfer tube in an efficient manner, using numerical analysis.

The newly developed HiPerV*3 utilizes the optimal design technology to greatly increase vaporization performance in addition to:

  • Considerably reducing construction costs (20 percent less) through decreasing the number of tubes by half, and
  • Reducing installation space by (30 percent less)
2.Enhancing operations

In 1985, Tokyo Gas developed and began using explosive joints so that quick startup from ambient temperature is possible without cool-down running which was required in conventional operation.

Explosive joints are made from layered pipes of aluminum, titanium, nickel and stainless steel. The joints are structured so that they can absorb thermal stress by combining them in order of the coefficient of thermal expansion from large to small. Currently, the joints are used in connecting off-site LNG pipes to vaporizers. The joints have improved safety and contributed to making operations easier.

3.Enhancing maintenance

From 1998 Tokyo Gas adopted anticorrosive material-clad heat transfer tubes from the extrusion forming stage. The cladding is made from an aluminum-zinc alloy and serves as a sacrificial anode.

Utilizing the clad heat transfer tubes makes repair of the aluminum-zinc alloy coating unnecessary resulting in considerable savings on maintenance costs.

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NO.3 Sales performance

Over the four years since the HiPerV was first introduced, Sumitomo Precision Products has sold 16 units, as shown below. The company has sold approximately 130 units in Japan and approximately 40 units overseas of the conventional-type ORVs. These results clearly show this is the ORV most favored by customers.

Figure04Figure04
Tokyo Gas Ohgishima Terminal, HiPerV width LNG/LPG mixture calorific value control(first unit)

Tokyo Gas Ohgishima Terminal, HiPerV with LNG/LPG mixture calorific value control(first unit)

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NO.4 Our strengths

Tokyo Gas and Sumitomo Precision Products have accumulated a wealth of technological know-how over more than a quarter century through not only designing and constructing ORVs, but also operation and maintenance and other technologies involving the entire installation lifecycle.

Specifically, the two companies analyze data acquired from trial ORV installations at the Negishi Terminal of Tokyo Gas using LNG and seawater. After correlating the basic design data from numerical calculations, Sumitomo Precision Products fine-tunes the design and begins manufacturing.

Our ORVs boast an overwhelming market share within Japan and are the most used throughout the world owing to ongoing exporting efforts to provide excellent technologies*4.

Based on these cutting-edge technologies, we offer open rack type LNG vaporizers which exceed customer requirements for reliability, cost performance and effortless operations.

Do not hesitate to contact us to see how we can help your operation.

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NO.5 Inquiries

Click to contact us about any questions you may have concerning the information on this webpage.

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NO.6 Terminology
1) What is an ORV?
A vaporizer is a device used to re-gasify liquefied natural gas (LNG), which is cooled at super low temperatures, by heat exchange. The open rack type LNG vaporizer (ORV) uses seawater as its heat source. By running seawater over the aluminum tubes, the LNG inside the tubes converts from a liquid into a gas. Because this method is very cost-efficient to operate and consists of a simplistic structure, it is easy to operate and maintain. It is the safest and most reliable vaporizer. ORVs are normally used for a base load due to these features.
2) A 20 percent construction cost reduction was calculated when compared to the conventional Tokyo Gas ORVs
3) HiPerV is an acronym for High Performance ORV
4) Includes conventional ORVs
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