The writers at GreenBuildingAdvisor.com have many opportunities to cover new breakthroughs and experiments in products and technologies relating to environmentally friendly construction. Some, more than others, are particularly exciting. For writer Alex Wilson, one of the more exciting technologies is the heat pump that can use carbon dioxide as a working fluid. To fully understand why this exciting, it is important to understand refrigerants. They are fluids typically used in refrigerators, air conditioners, and heat pumps that can transfer heat from one space to another. This process is most effective when the refrigerant can undergo a phase change (like changing from liquid to gas), which requires significant amounts of heat.
Read the full article here: A Heat Pump Using Carbon Dioxide as the Refrigerant