When Eichleay Engineers Inc., needed to design an air-handling system that would keep temperatures in a pharmaceutical warehouse within ±1°F, the engineering consultants used Marlborough, Mass.-based Flomerics’ Flovent software to identify a fan configuration that met the pharmaceutical company’s requirements for both temperature variation and air velocity.
The pharmaceutical warehouse contains 49,200 ft2 of warehouse storage space and has a roof height that varies from 25 to 28'. To maximize the life of the product stored in the facility, the client required the temperature throughout the entire interior space be held between 67 and 74°F (19 and 23°C), at less than 50 percent relative humidity.
“We began the project using a standard computer calculation to design an HVAC system that was capable of keeping the temperature in the building at the required level,” says Michael Simpson, mechanical engineer for Eichleay. “This system could get us to the right average temperature but left us with little safety margin.”
Using the software, a consultant simulated the existing building and several alternatives using different types of fans. He found that the addition of 50 de-stratification fans reduced the temperature variation within the building to a ±1°F level.
The building’s control system was designed to issue an alert to plant operating personnel whenever temperatures in the space fall outside a ±3.5°F limit from setpoint. “The new system has been up for 18 months, and since then, the temperature alarms have not shown any excursions,” says Simpson.