Responding to growing demand for environmentally friendly LNGs
Natural gas, attracting attention as environmentally friendly and a clean energy alternative to oil. Among them, shale gas is a promising source of energy that can meet global energy demand for the next 200 to 250 years if all the earth's reserves are collected, and demand for it is growing now throughout the world.
Since natural gas, which is a fossil fuel in the form of gas, contracts 600 times when cooled to -162 degrees Celsius until it becomes a liquid, it can be transported efficiently as an LNG (liquefied natural gas). “Cryogenic Pumps” are indispensable to the transportation of LNGs. It is difficult to handle cryogenic combustible gas and only a few companies in the world are capable of manufacturing specialized pumps ready for such gas. As a major manufacturer of specialized pumps, we supply products to all parts of the world.
Specialized pump with design accuracy comparable to that of “precision equipment”
The basic structure of a Cryogenic Pump has been inherited from the technology of U.S. company J.C. Carter, with which we formed a technical cooperation in 1982. Although it was a novel structure at that time, we made Nikkiso-specific improvements to the pump to meet the strenuous requirements of customers in Japan, which is the world's leading LNG-consuming nation, before starting domestic production.
The major point of the design of this extremely special pump is that stable operation is required at cryogenic temperatures under -162 degrees Celsius. Thus, different metals are used in the main portion to ensure strength and durability. However, this means that we operate equipment made of metals having different heat contraction rates with cryogenic liquid, requiring an accuracy of 1/100 mm in design. Since operation checks are impossible at normal temperatures, we conduct testing using actual LNG at a test site to check the product quality thoroughly before delivery. Cryogenic Pumps, which are virtually “precision equipment”, clearly demonstrate our high technological skills.
Manufacturing of world's largest high-pressure pumps is our exclusive territory
Among the Cryogenic Pumps manufactured by Nikkiso, one of the world's largest Cryogenic Pumps, which was delivered to China in 2008, has a height of about 6 m, a weight of about 4 t, and an output of 2,000 kW.
Despite the upsizing of products, the same roles and performances are required of the pumps. The most important thing is to ensure that the pump can properly cope with facility environment, meet requirements, and operate stably at cryogenic temperatures.
Putting our longtime experience in manufacturing and unique know-how to full use, we meet these special needs. Based on our expertise and past experience, Cryogenic Pumps will continually develop while meeting the needs in the field.