Energy Conservation through Heat Recovery

In just 7 ½ months, Rohde redesigned, engineered and implemented an ammonia refrigeration system expansion, with integrated controls, using the existing infrastructure.

Customized Solution:

  • Rohde’s redesign eliminated the high-pressure receiver and significantly reduced the ammonia charge required in the system. Rohde’s design reduced it to 7,000 lbs. from the initial base bid of 14,000 lbs.

  • Variable frequency drives on all components including the two new 150 HP compressors.

  • Low discharge pressure design that allowed the system to run at much lower pressure in the cooler months.

  • Redesign of all the expansion devices such that high pressure liquid was not required to get the liquid into the various evaporator coils.

  • Eliminated the need to change relief valves every five years by redesigning to remove surge drums.

  • Coil circuiting designed to carry oil back to the recirculation vessel to drain at a single point in the ammonia room rather than several points on the roof.

  • Saved the client over 38% in electrical costs and significantly reduced maintenance and operating costs.

  • Gas costs reduced by 5-10% with significant reduced maintenance costs.

  • · Eliminated the need for a full Process Safety Management program (PSM) and $30,000 in consulting fees by reducing charge holds below EPA and OSHA thresholds.


AGC Build Wisconsin Award, 2008

Stay in the Loop

© 2020 Rohde Brothers Inc.

W5745 Woodchuck Ln. Plymouth, WI 53073

Website design by Com-It Marketing

Why Rohde?

Rohde designs and fabricates award-winning systems and progressive solutions for new and established companies. We are one of the few mechanical contractors that have incorporated LEAN Manufacturing Principles into all aspects of the construction phase to work faster and smarter for you.