ASHRAE Journal - February 2020 - 48

ASHRAE - CELEBRATING 125 YEARS

good as the algorithms dictating its operation, so choosing the right software for the system is just as important
as having the correct hardware.
EEVs are not for every system and may not be worth
the price of retrofitting an existing system, but for those
looking for extremely accurate control, especially when
designing a new system, EEVs offer a precision that TXVs

simply cannot match. And as energy-efficiency regulations become ever stricter, demand is likely to increase,
which will drive down component costs.
For nearly 90 years, TXVs have performed a vital role in
refrigeration and air-conditioning systems by metering
out refrigerant into the evaporator. While the TXV was
first invented as way to protect the compressor, it proved
a valuable tool in both performance
and efficiency. And EEVs may one
day take the place of TXVs as the
most popular metered throttling
device, that day is likely far off in the
future.

References
1. Danfoss. 2017. "How Thermostatic
Expansion Valves Work." https://www.
danfoss.com/en-us/service-and-support/
case-studies/dcs/how-thermostaticexpansion-valves-work/.
2. Briley, G. 2004. "A History of
Refrigeration," ASHRAE Journal 46 (11): S31-S34.
3. US Patent 1,747,958-Thompson, H.E.
1927. "Thermostatic Control for Automatic
Refrigerating Systems."
4. Danfoss. 2017. "Benefits and Advantages
of Thermostatic Expansion Valves Versus
Other Throttling Devices." https://www.
danfoss.com/en-us/service-and-support/
case-studies/dcs/benefits-and-advantagesof-thermostatic-expansion-valves-vs-otherthrottling-devices/.
5. Danfoss. 2017. "Thermostatic
Expansion Valve Troubleshooting."
https://assets.danfoss.com/documents/
DOC307573579568/DOC307573579568.pdf.
6. ANSI/ASHRAE/IES Standard 90.12016-Energy Standard for Buildings Except
Low-Rise Residential Buildings. https://www.
ashrae.org.
7. "ENERGY STAR® Program Requirements
for Light Commercial HVAC: Eligibility
Criteria" published at https://www.
energystar.gov/ia/partners/product_specs/
eligibility/lchvac_elig.pdf.
8. European Commission. 2005. "Green
paper on energy efficiency or doing more
with less." https://www.eea.europa.eu.
9. China.org. 2015. "Mitigating
Climate Change." https://www.china.
org.cn/environment/news/2015-11/23/
content_37136145.htm.
10. Danfoss. 2017. "Benefits and
Advantages of Thermostatic Expansion
Valves Versus Other Throttling Devices."
https://www.danfoss.com/en-us/
service-and-support/case-studies/dcs/
benefits-and-advantages-of-thermostaticexpansion-valves-vs-other-throttlingdevices/.
48

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https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/how-thermostaticexpansion-valves-work/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/how-thermostaticexpansion-valves-work/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/how-thermostaticexpansion-valves-work/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/how-thermostaticexpansion-valves-work/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/benefits-and-advantagesof-thermostatic-expansion-valves-vs-otherthrottling-devices/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/benefits-and-advantagesof-thermostatic-expansion-valves-vs-otherthrottling-devices/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/benefits-and-advantagesof-thermostatic-expansion-valves-vs-otherthrottling-devices/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/benefits-and-advantagesof-thermostatic-expansion-valves-vs-otherthrottling-devices/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/benefits-and-advantagesof-thermostatic-expansion-valves-vs-otherthrottling-devices/ https://assets.danfoss.com/documents/DOC307573579568/DOC307573579568.pdf https://assets.danfoss.com/documents/DOC307573579568/DOC307573579568.pdf http://www.ashrae.org http://www.ashrae.org https://www.energystar.gov/ia/partners/product_specs/eligibility/lchvac_elig.pdf https://www.energystar.gov/ia/partners/product_specs/eligibility/lchvac_elig.pdf https://www.energystar.gov/ia/partners/product_specs/eligibility/lchvac_elig.pdf https://www.eea.europa.eu http://www.China.org http://www.china.org.cn/environment/news/2015-11/23/content_37136145.htm http://www.china.org.cn/environment/news/2015-11/23/content_37136145.htm http://www.china.org.cn/environment/news/2015-11/23/content_37136145.htm http://www.airflowbalancing.com https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/benefits-and-advantages-of-thermostaticexpansion-valves-vs-other-throttlingdevices/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/benefits-and-advantages-of-thermostaticexpansion-valves-vs-other-throttlingdevices/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/benefits-and-advantages-of-thermostaticexpansion-valves-vs-other-throttlingdevices/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/benefits-and-advantages-of-thermostaticexpansion-valves-vs-other-throttlingdevices/ https://www.danfoss.com/en-us/service-and-support/case-studies/dcs/benefits-and-advantages-of-thermostaticexpansion-valves-vs-other-throttlingdevices/ https://www.ashrae.org/

ASHRAE Journal - February 2020

Table of Contents for the Digital Edition of ASHRAE Journal - February 2020

Contents
ASHRAE Journal - February 2020 - Intro
ASHRAE Journal - February 2020 - Cover1
ASHRAE Journal - February 2020 - Cover2
ASHRAE Journal - February 2020 - Cover2a
ASHRAE Journal - February 2020 - Contents
ASHRAE Journal - February 2020 - 3
ASHRAE Journal - February 2020 - 4
ASHRAE Journal - February 2020 - 5
ASHRAE Journal - February 2020 - 6
ASHRAE Journal - February 2020 - 7
ASHRAE Journal - February 2020 - 8
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ASHRAE Journal - February 2020 - 10
ASHRAE Journal - February 2020 - 11
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ASHRAE Journal - February 2020 - Cover3
ASHRAE Journal - February 2020 - Cover4
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