Core Viewpoint - The development of the world's first green弹卡冷冻 device capable of achieving temperatures as low as -12°C represents a significant advancement in sustainable refrigeration technology, addressing the high energy consumption and emissions associated with traditional cooling methods [1][8]. Group 1: Industry Challenges - The global warming crisis and increasing refrigeration demand create a stark contradiction, with traditional vapor compression refrigeration technologies being major sources of carbon emissions due to the use of potent greenhouse gases like hydrofluorocarbons [2]. - It is estimated that by 2025, the annual emissions of hydrofluorocarbons will exceed 1.2 billion tons of CO2 equivalent, with approximately 27% (around 330 million tons) coming from sub-zero refrigeration applications [2]. Group 2: Technological Innovations - The new弹卡冷冻 technology utilizes a nickel-titanium shape memory alloy that undergoes solid-state phase changes under cyclic stress, allowing for efficient cooling without traditional refrigerants [2][3]. - The team selected a high nickel content (51.2 at%) nickel-titanium alloy, achieving an austenite finish temperature of -20.8°C, which maintains excellent superelasticity and significant phase change latent heat even at low temperatures [3]. - A 30 wt% calcium chloride solution was chosen as the heat transfer fluid, which remains fluid at low temperatures and effectively avoids ice crystal blockage, enhancing heat transfer efficiency [3][6]. Group 3: Performance Metrics - The prototype, measuring 1.0×0.5×0.5 m³, successfully achieved a temperature drop from approximately 24°C to -12°C, demonstrating a temperature difference of 36°C, marking a first in the field [4]. - The system can achieve a maximum energy efficiency of 3.4, with a cooling power of 1.43 watts per gram, showcasing its energy-saving and cooling potential [6]. Group 4: Future Implications - The successful development of the green弹卡冷冻 device could significantly reduce greenhouse gas emissions by approximately 330 million tons of CO2 equivalent annually if widely adopted in the global refrigeration sector [8]. - The technology is seen as a potential game-changer for the refrigeration industry, especially as regulations on hydrofluorocarbons become stricter, offering a zero-emission, low-energy alternative to traditional methods [8].