Cold Storage Control Measure for TRUs
This page last reviewed July 31, 2015Background:
California has recently set new, aggressive targets for reducing pollution, including decreasing greenhouse gas (GHG) emissions 40 percent below 1990 levels by 2030, 80 percent by 2050, and cutting petroleum use by cars and trucks by up to half from current 2015 levels by 2030. Improving freight efficiency and transitioning to zero or near-zero emission technologies will help achieve these goals by reducing GHG emissions as well as criteria pollutant emissions (e.g. nitrogen oxides, non-methane hydrocarbons, and particulate matter).
TRUs are defined as refrigeration systems that are powered by internal combustion engines. They control the environment of temperature-sensitive products in refrigerated trucks, trailers, railcars and shipping containers. They may be capable of cooling or heating. TRUs are used to transport and store many products, including, but not limited to food, pharmaceuticals, plants, medicines, blood, chemicals, photographic film, art work, and explosives. Transport refrigerators (TR) are similar in most regards to TRUs; but they do not have an internal combustion engine inside the unit housing.
companies use TRUs for extended cold
storage during the four- to six-week period before major holidays and
centers and grocery stores are
known to run out of cold storage space in their buildings, so they
overflow goods in TRU-equipped trucks and trailers outside the grocery
and distribution centers. Some distribution centers also operate in a
way that causes
TRU-equipped trucks and trailers to be parked or queued for extended
for an open loading dock space or manpower to unload goods, or waiting
dispatch or driver pick-up. These
sometimes continue for several days.
A few DCs are using refrigerated trailers equipped with
all-electric stationary TRs ( e.g. Carrier Transicold's Vector 8100)
that are plugged into the grid while in use.
In April 2015, ARB staff released a Sustainable Freight Discussion Document which discussed a potential regulation to limit stationary operation of fossil-fueled TRUs for cold storage and incentives to install infrastructure at affected locations. Stationary operating limits would be phased in over time, conceptually starting at eight hours and affecting grocery stores, distribution centers, and the TRUs that deliver goods to and from these facilities. Later phases may further limit the stationary operating time and affect more types of facilities or locations. The regulation would encourage more energy-efficient operations that reduce emissions of GHGs and criteria pollutants from internal combustion engine-driven refrigeration systems. Compliance could be achieved several ways:
- Use electrically-driven TRs or TRUs that plug into grid power while stationary (e.g. all-electric TRs, hybrid-electric TRUs, or TRUs equipped with electric standby;
- Use cryogenic TRs (e.g. using liquid nitrogen, liquid carbon dioxide, or liquid air to cool the cargo space),
- Use adequately sized cold storage facilities,
- Use effective load scheduling and dispatch systems and procedures.
near-term GHG control measure is only in
the preliminary concepts phase, and workshops
to discuss the concepts with stakeholders will begin fall
2015. In addition
to producing near-term
GHG and criteria pollutant emission reductions, the proposed regulatory
could help to advance zero and near-zero emission transport
system commercialization by increasing the earlier penetration of
infrastructure that will be needed for those technologies. The same infrastructure
that is used to
comply with the near-term GHG control measure could be used as zero and
near-zero emission technologies become commercially ready.
Posted July 31, 2015
The California Air Resources Board (ARB/Board) announces the release of the draft document “Technology Assessment: Transport Refrigerators." The draft technology assessment can be viewed and downloaded from the ARB’s technology and fuels assessment webpage at: http://www.arb.ca.gov/msprog/tech/report.htm
Interested parties are encouraged to submit comments on the draft technology assessment through the technology and fuels assessment web page for public comments at:
http://www.arb.ca.gov/msprog/tech/techreport/comments.htm. We request to receive comments within 30 days of the posting of this draft assessment, if possible.
If you have questions regarding the draft technology assessment, please contact Mr. Rodney Hill, Staff Air Pollution Specialist, at 916-327-5636, or email to Rodney.Hill@arb.ca.gov.
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