PC Industrial Refrigeration CO2An online opinion poll aimed at gauging readiness for CO2 in subcritical and trans-critical refrigeration systems was conducted by Baltimore-based Danfoss.

The preliminary poll, “CO2 Industry Indicator,” gathered input from OEMs, consultants, contractors and end users to estimate the level and rate CO2 systems are being deployed in the United States.

Results show that deployment of CO2 systems is motivated by several factors such as demand for greater energy efficiency (25 percent) and the potential for HFC phasedown and other regulations (24 percent).

Consultants and end users noted the importance of CO2 as a means to employ corporate sustainability initiatives. Contractors liked the safety of CO2.

Perceived barriers to implementing the systems included initial system costs (32 percent) and contractors’ lack of familiarity with the technology (40 percent). Consultants and end users also expressed concern about platform stability, including operation at higher ambient temperatures.

The study showed increasing acceptance of CO2 as an alternative to HFC refrigerants in applications such as industrial refrigeration, transport refrigeration and supermarkets. Among the OEMs polled, 84 percent identified CO2 as a viable alternative refrigerant. Overall, the number of projects that incorporate CO2 is increasing, with new construction applications outpacing retrofits.