How To Develop Cooling Tower Life Cycle Cost Analysis: Introduction

How To Develop Cooling Tower Life Cycle Cost Analysis: Introduction

Cooling towers cost money. Cooling towers save money. In between those two statements lies a host of variables that must be evaluated in order for the engineer to make an informed decision on behalf of…

Read More

Thinking Beyond Plate & Frame Heat Exchangers for Waterside Economizing

By Chad Edmondson

  “What type of heat exchanger is best for my waterside economizer application?”

 It’s a question we get asked a lot.  With the increased requirement for either an air or waterside economizing in ASHRAE 90.1 – 2010, we expect to get asked even more – especially since the DOE expects states to adopt the revised standard into their non-residential building codes by as early as next month.

 U-Factor Versus Real-World-Factor

Conventional engineering logic has always leaned toward plate and frame technology for waterside

Read More

Designing Waterside Economizer Piping to Meet ASHRAE 90.1 - 2010

By Chris Edmondson 

Gone are the days of optional air or waterside economizing.  Gone also are the days of waterside economizers piped in parallel.  In other words, the “either/or” operation of the chillers and economizers that we’re all accustomed to will soon be a thing of the past.

Read More

ASHRAE (and DOE) Get More Specific About Economizer Requirements

By Chris Edmondson

It’s time we all start economizing – and no, we’re not talking about budget.

ASHRAE 90.1 – 2010, which officially becomes part of U.S. commercial building codes in less than one year dictates that henceforth all cooling systems shall include either an air or water economizer per Sections 6.5.1.1 through 6.5.1.4. The only areas in the U.S. where this will not apply are the southernmost tip of Florida and south/southwest portions of Arizona where the respective climates do not favor economizing.

Read More

Are YOU Ready for ASHRAE 90.1 – 2010?

By Chad Edmondson

It’s hard to believe the end of summer is only a few weeks away.   It’s a stark reminder of how quickly time passes – and how quickly October 18, 2013 will also be here.

(What?  That date doesn’t ring a bell?)

It should.  October 18, 2013 is the official date by which all states are required to certify that they have updated their commercial building codes to meet or exceed the new energy efficiency of ASHRAE 90.1 – 2010.  

This is BIG

Read More