Turning heat into cold                                                      
Thermally-activated chilling produces cooling primarily using heat as its energy source. Commercial installations were commonplace until vapor compression refrigeration became the standard in the
mid-1960s. Environmental concerns and volatile energy costs are driving the reintroduction of this newly modernized technology.

Hitachi Appliances, Inc.

Hitachi offers a 30 RT and 100 RT line of high efficiency, heat-fired chillers that are compact and feature innovative control intelligence. Designed for future expansion, these units consume electricity at between 3-5 KW per RT. Chillers are also available from Hitachi in sizes up to 10,000 RT.

Refrigerant Concerns

Absorption and adsorption chillers use natural refrigerants, not CFCs or HCFCs. Thus, greenhouse gas generating potential is largely eliminated. New research into the use of natural refrigerant shows great promise, in both secondary loop and standalone applications.

Image courtesy of Eco-Max Chillers

Heat-driven chillers, whether based on ammonia/water or lithium bromide/water absorption, or desiccant adsorption, are efficient, reliable and cost effective. As R&D and tooling investments are amortized, competitive pricing will help reduce energy use.

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