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Case Studies: Industrial Refrigeration - Kendall-Jackson Winery

Kendall-Jackson Winery - Geyserville, California

Benefits Realized:

  • Energy Savings
  • Heat Recovery
  • Environmentally Friendly

What was Installed:
Manufacturer: Tecogen
Type: TecoFROST®

In the fall of 1994, Kendall-Jackson Winery executives started to gear up for a large production increase at their Vinwood facility in Geyserville. Consulting systems engineers IRAPP and Pacific Gas & Electric (PG&E) guided expansion and upgrade plans and advised them to install an FES natural gas-driven refrigeration system. PG&E, in addition to providing a sizable rebate and giving technical assistance, played a major role in the final decision to go with gas cooling in the main wine cooling facility. "Incremental cost calculations were done at various stages," says Dan Williamson, PG&E major account representative.

"We recommended FES because it had an industrial screw compressor with a gas-driven engine. We know the company, and we have a lot of confidence in it products," says Mike Davidson of IRAPP. Three FES 150-ton 16L-GED packages form a central refrigeration system utilizing gas engine-driven ammonia screw compressors. These are connected to a flooded ammonia/glycol chiller which pumps a glycol/water mixture to handle the winery loads. The system circulates cooled glycol through the jacked wine tanks for fermentation and cold stabilization, and through air handlers to cool the barrel storage room. Each unit has microprocessor technology with a programmable control panel, featuring a keypad and digital readout.

"Along with showing them how to save money on their electricity, we showed them how to save energy by recovering the heat generated by engines to heat water for cleaning and sanitization needs," says Davidson. This heat -- to 180°F -- replenishes a 10,000 gallon water tank. Heat previously was supplied by a standard boiler that is now used to supplement the new system during high demand periods.

Kendall-Jackson's Operations Manager, Wes Logsdon, says, "We use a lot of hot water for cleaning and this system helps provide more than enough for our needs. Gas cooling not only saved us money and energy, but it's helping us realize another goal - that of contributing to better the environment."

The winery also saved money by avoiding the need to increase electrical service and add to its electrical infrastructure. The old electric-driven refrigeration system was retained as a backup and to use during high refrigeration load operations. After all calculations were figured for equipment, installation, maintenance, rebates, and energy cost savings, payback on the gas refrigeration equipment was expected in about two years.

Note: Tecogen now engineers, markets and services the TecoFROST® gas engine-driven system, formerly the FES engine-driven package. TecoFROST® units are manufactured by FES in York, PA.