Problem: Tired, Aging Air Handling Units We look at hundreds of Air Handling Units each year. All types, all sizes and all conditions. Typically we are called in to assess problems or look at replacement options. In some cases units are not in bad condition; they don’t need to be replaced, just refurbished. I… Read more »
Posts By: Jim Shiminski
Project Snapshot | Energy Recovery Unit – Tuck School at Dartmouth College
Project Name: Whittemore Hall Owner: Tuck School of Business at Dartmouth College Project Application: Dormitory for Tuck Students Mechanical Engineer: BR+A Equipment: Energy Recovery Unit Manufacturer: Annexair Size: 15,000 CFM Whittemore Hall The Tuck School of Business at Dartmouth College in New Hampshire was founded in 1900…. Read more »
Pumped Glycol Energy Recovery | Preliminary Design Questions
Preliminary Design Questions for a Pumped Glycol Energy Recovery System: Every energy recovery design starts with a list of questions that should be answered. If these items are explored and discussed early on it makes for a significantly better design. There are several distinct advantages in packaged pumped glycol systems from Konvekta. A key system… Read more »
Project Snapshot | High Plume Dilution Fans for Diesel Generator Exhaust
Project Name: Mass State Police Academy Owner: State of Massachusetts Project Application: Emergency Diesel Generator Re-entrainment Remediation Mechanical Engineer: Shekar Associates, Inc. Mechanical Contractor: Kleeberg Sheet Metal, Inc. Equipment: “Tri-Stack” High Plume Dilution Fan Manufacturer: Strobic Air Size: TS3S150A12 – 14000cfm, TS1S050A12 – 2100cfm DAC Sales Engineer: David Goodman The Problem: The new 911… Read more »
Ask Rick: Air Handling Units | Single point power connection?
Q. We are in a disagreement over specification language. In your opinion what does a “Single Point Power Connection” include? Thanks, Boston Engineer. Good Question. This comes up all the time. Depending on the application and circumstances “Single Point Power Connection” is defined in multiple ways. Typically there are assumptions made, often times wrong,… Read more »
Custom Air Handling Units | Coil Selection Guidelines
I have included a collection of notes that we have pulled together over the years that guide us through typical coil selections for custom air handling units. Coils Basics: Header Orientation – Supply low leaving, return high entering Coil Hand – Face the entering air side of the coil to determine its hand connection. With… Read more »
Benefits of UVC in Health Care Facilities
UVC Emitters are ideal for hospitals, clinics, laboratories, hospices, senior facilities and medical offices. UV light in the form of germicidal lamps has been used since the late 1800s to kill the types of microorganisms that typically cause indoor air quality (IAQ) problems — bacteria, mold, yeast, and viruses. Installed at the cooling coil and… Read more »
High Pressure Water Atomizing Humidifier | Energy Savings
It’s all in the numbers. Look at the cost differences listed below for typical humidification systems. There it is. It’s pretty simple. Even if these numbers from a leading manufacturer are off by a factor of 10 (or even 100), it still makes complete sense to evaluate… Read more »
Project Snapshot | Energy Recovery Wheels For Hospitals
Walter Reed National Military Medical Center Project Overview Project Name: Walter Reed National Military Medical Center Location: Bethesda, Md. Floor area: 515,000-square-foot ambulatory care building; 162,000-square-foot hospital addition; 450,000-square-foot hospital renovation; and 943-space parking structure Number of floors: Various Number of beds: 174 (of 345… Read more »
Energy Recovery Wheel | Purge Section
There are two ways that air can leak from the exhaust side to the supply side of a wheel: Cross-Flow Leakage – occurs when air leaks from the exhaust side to the supply side through the seals or any gaps in the construction. Carryover Leakage – occurs in rotary recovery wheels as the wheel rotates… Read more »