Introduction to Water Source Heat Pump Systems Part 2: When and Where to Use Them

Introduction to Water Source Heat Pump Systems Part 2: When and Where to Use Them

Water source heat pump (WSHP) systems can be successfully and advantageously applied in a wide variety of commercial, institutional, and multi-unit residential buildings. The commonality that makes any of these potentially suitable for WSHP design is the need for simultaneous heating and cooling with individualized zone control. But WSHPs can be useful in meeting other requirements….

Read More

How To Size A Waterside Economizer Part 5: Why Plate & Frame Heat Exchangers Are Preferred

How To Size A Waterside Economizer Part 5: Why Plate & Frame Heat Exchangers Are Preferred

Waterside economizing typically involves the transfer of BTUs from an open loop cooling tower system to a closed loop chilled water system. Since these two hydronic systems must remain separate so we do not foul the chilled water systems, a heat exchanger is required to prevent mixing of the fluids, but what type of heat exchanger should you choose?

Read More

How To Size A Waterside Economizer Part 1: How ASHRAE 90.1 Updates Have (Or WILL) Change Chilled Water Design

Has your state adopted ASHRAE 90.1-2010 or beyond into its commercial building code? If so, then it is highly likely that you should be incorporating either waterside or airside economizing into your cooling design. The Standard has effectively made air or waterside economizing a requirement in virtually every…

Read More

How To Develop Cooling Tower Life Cycle Cost Analysis: Incorporating Part Load Values or IPLV

How To Develop Cooling Tower Life Cycle Cost Analysis: Incorporating Part Load Values or IPLV

Creating a reasonable load profile is essential for calculating and then comparing lifecycle costs of specific cooling towers, including various brands and/or models within a specific brand. To do that we have to estimate the number of hours a cooling tower will operate at …

Read More

How to Determine Control Head for a Variable Speed Pumping System

How to Determine Control Head for a Variable Speed Pumping System

To control a variable speed pumping system, we must determine the minimum operational head of the system. Some refer to this value as constant head, minimum head, independent head, etc. Throughout this and in other JMP blogs, we refer to it as ...

Read More