©2015 Solution Dynamics, LLC CASE STUDY: AMMONIA EVAPORATOR VFDs Electric Savings Dairy Plant Improves Refrigeration System Efficiency Using VFDs Installed on Evaporator Fans CHALLENGE — Achieving Year-Round Benefits Using VFDs Installed on Penthouse Evaporator Fans The penthouse coolers operated at fixed speed, with no automatic temperature before the central control system was installed, typi- cal of many cold storage spaces. Add

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