As with any refrigeration system, controlling the flow of refrigerant is vital in making a cold room operate properly. Two of the most common types of refrigerant control valves are thermostatic expansion valves and solenoid valves.
The design and magnitude of a new residential indoor pool built onto a 21,000-square-foot, 100-year-old home named “Daybreak” in Montclair, New Jersey, confronted mechanical engineers with psychrometric and sustainability challenges on par with huge commercial indoor waterparks.
Johnson Controls has released version 3.4 of its SMART Equipment Control Firmware. The new SMART equipment firmware incorporates a new feature known as Continuous Reset Single Zone Control™ (CRSZ Control). Unlike the typical Single Zone Variable Air Volume (VAV) system operation, company reps said the CRSZ Control provides precise control of space comfort while maximizing energy savings.
As seen in the previous articles in this series, each component of a cold room plays a vital role in ensuring optimal performance. In this article, we will look at one of the most potentially damaging enemies of nearly all refrigeration systems: moisture.
The YORK® brand of Johnson Controls has released two new commercial units — the 6.5- to 12.5-ton Predator™ series and 15- to 23-ton Large Sunline™ series. With efficiencies reaching as high as 21 IEER, these products comply with requirements set by the United States Department of Energy (DoE), ASHRAE 90.1-2013, 2015 International Energy Conservation Code, and the Consortium for Energy Efficiency’s Advanced Tier*.
Mitsubishi Electric Trane HVAC US LLC (METUS) introduced its CITY MULTI® N-Generation outdoor units. The N-Generation features a footprint up to 30 percent smaller than previous models and offers more design flexibility due to improvements in vertical piping limits.
Friedrich is now offering its VRP® (Variable Refrigerant Packaged) Heat Pump system in a larger three-ton size. Originally available in one or two-ton capacities typically used for lodging and hospitality properties, Friedrich is debuting the larger capacity VRP as a solution for multi-family and other light-commercial applications.
Engineered Systems magazine’s July 2019 issue examines the meticulous challenges involved with designing a central steam plant, why well-maintained central plants are facilities’ lifeblood, how radiant heated and cooled classrooms are evolving in educational settings, the role of VRF on utility bills, and much more.