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Turbo heat pumps and absorption chillers using exhaust heat

Turbo heat pumps and absorption chillers with exhaust heat recovery that reuse heat without waste

Reuse of "heat" is attracting renewed attention around the world

One of the indispensable initiatives for promoting the SDGs is "reuse". There is a desire for a society in which limited resources are not discarded, but are shared while reusing them. From recycled paper and plastic to food loss solutions. And not only "things that have a shape". Did you know that "heat" can also be reused?
Our lives generate a variety of "thermal energy". In addition to air conditioning equipment such as heating and cooling in buildings, food factories cook at high temperatures (heat) and refrigerators and freezers (cold) are used to store food. In petroleum and chemical plants, various temperatures are created and processed in boilers and distillation columns. The surplus of generated heat is discharged from the factory in the form of wastewater (exhaust hot water), or in some cases, it is discharged into the air from the chimney as steam or exhaust gas at a high temperature exceeding 300°C. The reuse of heat, in which such exhausted heat (waste heat) is diverted to other applications, is now attracting renewed attention around the world, and EBARA's products are making a contribution.

Two EBARA products that "reuse heat

So, what kind of methods and devices are used to reuse heat? As a pioneer in pumps, Ebara also has the technology of "pumps that pump heat". There are two main types of products.
In 1930, Ebara developed the first domestically produced turbo chiller, and the turbo heat pump, which applied this technology, is a device that recovers and moves heat with electric power without using fuel, using the property of temperature rising and falling by changing the pressure of liquids and gases inside. This technology is also used in air conditioners and water heaters, but by using waste heat in turbo heat pumps, it is possible to produce a large amount of hot water with a small amount of electricity by pumping up thermal energy from the discarded heat.

The other device, the "Waste Heat Absorption Refrigerator," produces cold water by the action of evaporation and absorption of water. The main point is that cold heat can be obtained using "discarded heat" as a driving source. Traditionally, fossil fuels have been used to operate absorption refrigerators, but recently, there has been a growing need for "exhaust heat input absorption refrigerators" that can be driven only by exhaust heat, except for some equipment such as control panels and auxiliary pumps.

Supporting the future of industry through the effective use of heat

Both "Turbo Heat Pump" and "Waste Heat Absorption Refrigerator" have a long history among our products, and the technology has been cultivated through Japan's many efforts to save energy. In recent years, against the backdrop of the SDGs, there has been a growing interest in CO₂ reduction and the effective use of heat, and we have been given a place to make a significant contribution. We will continue to update our lineup according to the times, such as subdividing our lineup according to temperature and heat source, and support the future of new industries that make full use of energy in factories.