ASHRAE Journal - June 2019 - 14

INDUSTRY NEWS

Solid Plastic Crystals Could Compete
With Conventional Liquid Coolants
CAMBRIDGE, ENGLAND-Researchers have
identified a solid that could replace
the inefficient fluids used in most
refrigerators and air conditioners.
When put under pressure, plastic
crystals of neopentylglycol (NPG)
yield huge cooling effects-enough
to make them competitive with conventional liquid coolants. Organic
materials are easier to compress
because of their chemical bonds.
NPG has loose bonds in its microscopic structure, which allows the
molecules to rotate relatively freely.
Compressing NPG yields unprecedentedly large thermal changes
due to molecular reconfiguration.

14

ASHRAE JOURNAL

ashrae.org

The temperature change achieved
with NPGs is comparable with those
achieved in hydrofluorocarbons
(HFCs) and hydrocarbons (HCs.) The
word "plastic" in "plastic crystal"
refers to its malleability.

Lab Helps Address Shortage
PHILADELPHIA, PA.-Johnson Controls
opened its Commercial HVAC
Pathways Vocational Lab in April.
Johnson Controls' Pathways program
provides a curriculum and HVAC
labs to prepare students for an HVAC
career to combat the industry's labor
shortage by providing training for
the future workforce.

J U N E 2 0 19

Flexible Cement
Could Heal Itself
RICHLAND, WASH.- Cement used in
geothermal wells is known to
crack under pressure and in
high-temperature environments
associated with drilling for geothermal energy. Pacific Northwest
National Laboratory's self-healing
cement uses a flexible ingredient, a polymer, to repair fractured
surfaces and fill cracks. This
minimizes mechanical failure
risks and offers a sustainable energy source. The technology could
eliminate the need to remove,
repair and replace cracked cement wells.


http://www.acrefine.com https://www.ashrae.org/

ASHRAE Journal - June 2019

Table of Contents for the Digital Edition of ASHRAE Journal - June 2019

Contents
ASHRAE Journal - June 2019 - Intro
ASHRAE Journal - June 2019 - Cover1
ASHRAE Journal - June 2019 - Cover2
ASHRAE Journal - June 2019 - 1
ASHRAE Journal - June 2019 - Contents
ASHRAE Journal - June 2019 - 3
ASHRAE Journal - June 2019 - 4
ASHRAE Journal - June 2019 - 5
ASHRAE Journal - June 2019 - 6
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ASHRAE Journal - June 2019 - Cover3
ASHRAE Journal - June 2019 - Cover4
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