Which factor is considered in the calculation of Total Equivalent Warming Impact (TEWI)?

• A. Only direct emissions of refrigerants
• B. Energy consumption and direct refrigerant emissions
• C. Only energy consumption
• D. Efficiency of refrigerant recovery

Answer: (B)

Total Equivalent Warming Impact (TEWI) is a critical concept in assessing the environmental impact of refrigeration systems and involves considering both direct and indirect emissions of greenhouse gases. The correct response includes energy consumption coupled with direct refrigerant emissions because:

Energy consumption reflects the indirect emissions resulting from the electricity used to power refrigeration systems. This energy usage is linked to the carbon footprint of the electricity source, as generating electricity can produce greenhouse gases, depending on the fuel mix.

Direct refrigerant emissions account for the gases that are released directly into the atmosphere from the refrigeration system, which are potent greenhouse gases with a significant global warming potential.

Combining both factors allows for a comprehensive evaluation of a system's overall impact on climate change, making it essential to understand how both energy usage and refrigerant leakage contribute to global warming. This holistic approach is crucial for developing strategies aimed at reducing the environmental footprint of refrigeration systems.