March 2020 Edition


Chiller System Optimization Platform Saves Energy at University of Tulsa

By By Senthil Kumar, CEM, Derrick Shoemake, Riyaz Papar, PE, CEM, Fellow ASHRAE, Hudson Technologies

The need to pay close attention to the university’s central chiller plant has always been a priority given the energy required to power the chillers, said Michael Bolien, Manager of Central Plant Operations, University of Tulsa. At TU, seven water-cooled chillers provide 7,000 tons of cooling capacity to all university facilities. “Over the past five years, TU has had a 17% increase in cooling load, based on the square footage of new buildings. Because our central chiller plant is our biggest energy user, optimizing its operations is our first line of defense,” said Bolien.

Read the full article here.


Advancing Standards and Compressor Technologies Can Capture More Part-load Energy Savings

By Ben Majerus, Danfoss

In recent years, the HVAC industry has enlarged its vision from focusing on equipment efficiency measured in terms of ratings points at specific conditions to include a whole building perspective that uses models of year-long, real-world conditions. Accordingly, energy standards have adopted new rating methods to evaluate equipment efficiency during part-load operation. In Part 1 of this two-part article series we examined how these standards are evolving.

Read the full article here.


Environmentally Sustainable Water Treatment Methods Help Improve Cooling Tower Efficiency and Reliability

By Dr. Prasad Kalakodimi, Bryan Shipman, and John Michael Shipman, ChemTreat

This article examines challenges with phosphorous-based programs, key factors to controlling cooling water chemistry and the advantages of phosphorous- and zinc-free cooling water treatment technology.

Read the full article here.


Finding Hidden Energy Waste in Water-cooled Chillers with Monitoring and Data Analytics

By Kevin Quapp and Greg Jimmie, ETC Group

Chillers are an essential component in many building Heating, Ventilation and Air Conditioning (HVAC) systems. They provide cooling to the building by working in tandem with pumps and cooling towers in a water-cooled chiller plant. Because of the chiller’s complexity and its role in cooling facilities, it is arguably the most important piece of equipment to maintain.

Read the full article here.

Download Current Edition