The ASHRAE Energy Standard 90.1 and the 2015 Michigan Energy Code require the AHRI plate heat exchangers used in heating and cooling applications be tested …
Bell & Gossett SU Heat Exchangers – Sleuthing the BTUH Capacity (Part 2)
As I noted in our last R. L. Deppmann Monday Morning Minutes (Part 1), an engineer in the Detroit area asked a question we get …
Bell & Gossett SU Heat Exchanger – Estimation of BTUH Capacity (Part 1): Field Identification
An engineer in the Detroit area asked a question we get asked every month of every year. The way he asked it caught my attention. …
Steam Inlet Pipe Size of Steam-to-Water Heat Exchangers
Many institutional and industrial projects use steam to heat the water for hydronic heating, domestic water, or processes. The pipe size prior to the steam …
Two Secrets for Bell and Gossett GPX Plate Heat Exchangers
Our recent R. L. Deppmann Monday Morning Minutes (MMM) articles have introduced a number of velocity considerations in gasketed plate heat exchangers. This week I’ll share two …
Velocity Limits in Gasketed Plate Heat Exchangers – Part 4
Plate exchangers such as the Bell and Gossett GPX series have significantly higher velocity limits than shell and tube heat exchangers, but there are still …
Minimum Velocity for Heat Exchangers with Glycol – Part 3
In part 1 and part 2 of this series, we discussed maximum and minimum heated water velocities in Bell & Gossett SU heat exchangers with standard …
Minimum Velocity in Heat Exchangers – Part 2
Shell and Tube heat exchangers are often used in institutional steam-to-water heating applications. This week’s Monday Morning Minutes post looks at minimum velocities in Bell & Gossett …
Maximum Velocities in Heat Exchangers – Part 1
Shell and Tube heat exchangers are often used in institutional steam-to-water heating applications. We recently received a call from a consulting engineer asking what the …
Heat Exchanger Fouling Factors
One of the most misunderstood items in the heat exchanger schedule is the fouling factor. This week’s Monday Morning Minutes post explores heat exchanger fouling factors …