Energy Concepts logo

ThermoChiller

The ThermoChiller provides refrigeration from any low-grade heat source (>160°F). Engine jacket water, engine/boiler/process exhaust, excess steam, thermal oxidizer heat, geothermal hot water and solar thermal can all be used to drive the system. A cooling tower is usually required.

Currently, converting low grade waste heat to refrigeration is not recognized as an opportunity; Thermochiller captures that overlooked opportunity. Thermochiller monetizes waste heat, and is a resilient and sustainable form of refrigeration.

Key Features

  • Low required driving temperatures (down to 160°F)
  • Wide range of heat source options
  • Can deliver chilled water, drive an ice maker, or be used for process cooling/blast freezing
  • Refrigeration output as low as -50°F

Specifications

  • Chilling Capacity (Tons): 10 to 5,000
  • Absorbent: Aqua Ammonia
  • Chilling COP: 0.6 typical
  • Can be dry air cooled
  • Outdoor installation

Chiller performance depends on the temperatures of the heat source, the chilling load and the cooling water. Lower temperature (<250°F) heat can be used to provide near-zero refrigeration. High temperature heat can be used to provide refrigeration down to -40°F.

Download the Thermochiller evaluation tool. For initial evaluation in typical applications. Does not represent full range of product capability.

Installations

Cogeneration + Icemaker

Staten Island, NY

Ice Maker at Cubit Power One, Staten Island, NY

160-Ton ThermoChiller produces ice in Staten Island, NY. This ThermoChiller is powered by exhaust from two 5.5 MW reciprocating natural gas engines, which supply power to the NYISO grid. Two Morris tube ice makers produce cube ice with refrigeration provided by the TC160 chiller.

Thermal Oxidizer Exhaust Heat Powered Chiller

ThermoChiller TC75 at commercial bakery in Utah

This 75-ton Thermochiller (TC75) installed at an industrial bakery in Utah is powered by an unique source of heat. The exhaust gas from the baking ovens is treated in a thermal oxidizer for removal of VOC’s and was previously vented to atmosphere. This “waste heat” is now captured and supplied to the Thermochiller as 230˚ F hot fluid to produce 75 tons of low temperature (28°F) refrigeration. The chilled propylene glycol supports production-related refrigerated processes. Thermochiller reject heat is sent back to a low grade heat recovery system, where it provides seasonal pre-heated make-up air to the production space, offsetting natural gas use, or is sent to the cooling tower.

Ice Maker at Kotzebue Electric Association

Kotzebue, Alaska

20-Ton ThermoChiller produces ice in Kotzebue, Alaska. One of Energy Concepts' patented high-efficiency absorption cycles is the "Vapor Exchange" cycle.

This cycle proved ideal to solve the problem of how to transport the large seasonal fish catch from a remote village in Alaska during the warm summer months when commercial salmon season is open.

Diesel engine jacket cooling water at 75°C is used as the heat source to power the VX cycle and produce 15 tons per day of flake ice for fish storage and transportation. Since the absorption system requires no additional fuel input, 80% savings in operating costs is realized compared to conventional icemaker.

See more details and photos about the TC-20 at KEA

Chena Hot Springs Resort

This geothermally driven ThermoChiller provides 16 tons of -5°F chilling to keep the interior of the Ice Hotel frozen. It runs on 160°F spring water and keeps the Aurora Ice Museum open year round. The Thermochiller uses Energy Concepts' patented double lift VX cycle.

See the presentation about the Chena Hot Springs Absorption Chiller. Read the detailed write-up about the Chena installation from Energy Concepts (Figures shown here)