I want to make readers aware of a technology developed in the late 1960s and early 70s that I believe is still viable today.
In those years, Rigidbilt Inc. developed a "box" type distributor for use primarily with ammonia coils using recirculated liquid and horizontal airflow. I, as vice president and engineer at Rigidbilt, along with Bob Lamprectt, then president at Rigidbilt, and Eugene Rytlewski, a consultant who spent 34 years with Westerlin and Campbell (the Chicago contracting office of York Corp.), were looking for uniform liquid distribution at varying liquid pressures and volumes, along with uniform distribution of hot gas for defrosting.