IEC 63277:2021(E) specifies the performance test methods for binary power generation systems.
It defines the normalized test conditions and estimates the power generation efficiency of binary power generation systems. It specifies the binary power generation systems having heating medium of non-pressurized hot water, with a maximum temperature less than 100 °C created by renewable energy or wasted heat in the industrial field and cold water as cooling medium. It is applied to binary power generation systems with electric power generation capacity of less than 100 kW. This document specifies performance testing, the standard conditions and the test methods for determining the electric power output and power generation efficiency of binary power generation systems. It includes heating conditions (temperature, flow rate) and cooling conditions (temperature, flow rate).