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Главная Архив Оргкомитет Будущие конференции American Society of Thermal and Fluids Engineering
Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

Recent Developments in Low GWP Refrigerants for Refrigeration and Air Conditioning


The current fluids most widely used in refrigeration and air conditioning systems globally are the subject of valid criticisms regarding their high direct global warming potential (GWP). In the interest of improved environmental sustainability, a new class of refrigerant molecule has been developed, the hydrofluoroolefin, or HFO. While the very low direct GWP values of these molecules are attractive, none of the HFOs by themselves are fully satisfactory for use in refrigeration and stationary air conditioning system designs, with concerns about capacity and flammability. Blended HFO-based refrigerant compositions have been developed and optimized to provide improved overall safety and performance, while retaining significant environmental sustainability properties versus the legacy refrigerants. As regional environmental and safety requirements are being defined more clearly, it has become possible to develop optimized HFO-based refrigerant blends that can directly meet these requirements. The trade-offs that exist between refrigeration capacity, energy efficiency (COP), temperature glide, GWP value, and flammability have been explored and assessed. Data presented will include thermodynamic properties, thermodynamic modeling results, and performance test results. These new refrigerant blends should provide useful options to help maintain the quality of life and health benefits from air conditioning and refrigeration, but in an energy efficient, cost effective, and environmentally sustainable manner.

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