Fast deliveries all over Europe
Darment logo Darment
Login +358 20 558 8250
  • SuomiSuomi
  • Suomi
  • English

Product categories

  • Refrigerants
  • Refrigeration oils
  • Compressors
  • Air conditioning and split accessories
  • Heat exchangers
  • Piping components
  • Automation and electronical
  • Condensing units
  • Tools
  • Fans
  • Copper pipes
  • Capillary parts
  • Mounting accessories
  • Insulations
  • Outlet
  • Delivery terms
  • Customer service
  • Refrigerant info
  • Articles
  • About us

    Etusivu » R744

R744 refrigerant (CO2) is good but not without problems

Refrigerant R744, i.e. carbon dioxide (CO2), is an environmentally friendly refrigerant. Its ODP is zero and its GWP is 1, which means that it has even less global warming potential than hydrocarbons.

R744 refrigerant – CO2 – use and applications

Carbon dioxide has many applications: in gas form, for example, it is used in the food industry for cooling, storage and pH control. Carbon dioxide prevents microbial growth, which means that it is used as a packaging gas for many food products.

Carbon dioxide is often used as a secondary refrigerant alongside ammonia.

As a refrigerant, it does not function exactly the same as hydrocarbons and the operating pressures may also be elevated as a result. For this reason, the efforts to develop improved equipment are ongoing to enable wider use of carbon dioxide. An asset of carbon dioxide plants is that the pipe size is significantly smaller than with other refrigerants.

Various plants that utilise carbon dioxide have been in test operation for many years. C02 is suited to refrigeration plants with either direct evaporation or pump circulation. It is an excellent refrigerant for freezing plants, in which it can provide evaporation temperatures of up to -50°C.

Many carbon dioxide plants are already in use in Europe, and these experiences will be helpful in the development and construction of new plants.

R744 refrigerant alternatives

Alternative refrigerants R134a, R404A, R22

CO2 price

Please send your inquiry: info@darment.fi

You can also call us +358 (0)20 5588 250.

Set up a customer account here and see the web shop prices directly as a logged in customer.

Want to know more?

Read more in Mikko Muuronen’s engineering thesis on the use of carbon dioxide as a refrigerant (2016).

Carbon dioxide was used as a refrigerant from the mid to late 19th century. When the use of hydrofluorocarbons began in the 1930s, carbon dioxide began to fade out of the picture. Due to the low environmental impact, the use of carbon dioxide as a refrigerant is once again under active development.

An interesting detail is that carbon dioxide has been used alongside halons in the fire extinguishing and smoke detection systems of ship engine rooms, for example. Since its operation within a system is rather slow, minimum release times have been specified for carbon dioxide. Read more about the matter in the Marine Engineering Study materials, for example.

  • MO89
  • R1234yf
  • R1234ze
  • R134a
  • R143a
  • R23
  • R245fa
  • R290
  • R32
  • R404A
  • R407A
  • R407C
  • R407F
  • R407H
  • R410A
  • R417A
  • R422A
  • R422D
  • R424A
  • R427A
  • R434A
  • R437A
  • R438A
  • R442A
  • R448A
  • R449A
  • R452A
  • R452B
  • R454A
  • R454B
  • R454C
  • R455A
  • R507A
  • R508B
  • R513A
  • R600
  • R600a
  • R744
Safety data sheet
Suomeksi
In English

R744 INFO

Refrigerant Category
Natural refrigerants
Chemical / blend name
CO2 / carbon dioxide
Chemical composition
CO2: 100%
GAS number
124-38-9
Flammability
No
Toxicity
No
Safety class
A1
Oil
MO, AB, POE
GWP
1
ODP
0
Boiling point (0bar (g))
-78,5 ℃
Critical temperature
31.04 ℃
Critical pressure
73,82 bar
Darment pitää kylmänä
Keeps it cold

Customer service

  • Contact us
  • Delivery terms
  • Warranty terms
  • Privacy policy
  • Create a customer account
  • Darment on Facebook
  • Darment on LinkedIn
  • Darment on Instagram
  • Darment on YouTube
  • Subscribe to our newsletter

Darment Oy, pick-up sales

Ruosilantie 18
00390 Helsinki, FINLAND
+358 20 55 88 250
info@darment.fi

Noutopisteen aukioloajat
MA – PE
6:30 – 17:00

Darment Oy, refrigerant warehouse

Harkkoraudantie 7
00700 Helsinki, FINLAND

  • Privacy policy
  • Information policy
Copyright Darment