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2010•Unpublished venueRequires access

Environmentally friendly non-flammable refrigerants

Yuki Yamada, Toshiyuki Tsuchiya, Tohru Shibanuma

Open publisher page 4 citations

Abstract

Recently, various partially-fluorinated propenes having a double bond in the molecule, with a lower GWP, have been proposed as refrigerants. It is 2,3,3,3-Tetrafluoropropene (HFO-1234yf) to attract attention most in those. The GWP of this refrigerant is 4. However, this refrigerant is flammable. When a refrigerant is flammable, the use of a highly safe material and/or structure in the electrical system will be required, and an upper limit needs to be set on the amount of the refrigerant which can be charged into an apparatus. In the present paper, the change to a non-flammable refrigerant by mixing of HFO-1234yf with other non-flammable refrigerants has been studied. The relationship between the flammability and the mixing ratios was investigated, and environmentally more friendly refrigerants without flammable range compared with those used are now proposed.

About this research paper

What this paper is about

Recently, various partially-fluorinated propenes having a double bond in the molecule, with a lower GWP, have been proposed as refrigerants. It is 2,3,3,3-Tetrafluoropropene (HFO-1234yf) to attract attention most in those. The GWP of this refrigerant is 4. However, this refrigerant is flammable. When a refrigerant is flammable, the use of a highly safe material and/or structure in the electrical system will be required, and an upper limit needs to be set on the amount of the refrigerant which can be charged into an apparatus. In the present paper, the change to a non-flammable refrigerant by mixing of HFO-1234yf with other non-flammable refrigerants has been studied. The relationship between the flammability and the mixing ratios was investigated, and environmentally more friendly refrigerants without flammable range compared with those used are now proposed.

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Available abstract

Recently, various partially-fluorinated propenes having a double bond in the molecule, with a lower GWP, have been proposed as refrigerants. It is 2,3,3,3-Tetrafluoropropene (HFO-1234yf) to attract attention most in those. The GWP of this refrigerant is 4. However, this refrigerant is flammable. When a refrigerant is flammable, the use of a highly safe material and/or structure in the electrical system will be required, and an upper limit needs to be set on the amount of the refrigerant which can be charged into an apparatus. In the present paper, the change to a non-flammable refrigerant by mixing of HFO-1234yf with other non-flammable refrigerants has been studied. The relationship between the flammability and the mixing ratios was investigated, and environmentally more friendly refrigerants without flammable range compared with those used are now proposed.

Key concepts: Flammable liquid, Refrigerant, Flammability, Environmentally friendly, Mixing (physics), Flammability limit, Global-warming potential, Environmental science

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