GB/T 33861-2017 in English

Constant temperature energy efficiency: refers to the energy consumed by the test chamber when maintaining a constant temperature per unit working space, with the unit of $\mathrm{J/m^{3}}$. In practical applications, it is often used to evaluate the energy efficiency of the test chamber under stable temperature conditions.

Ramping temperature energy efficiency: refers to the ratio of power consumption to the energy required for temperature change during the heating and cooling process of the test chamber. This indicator reflects the energy efficiency performance of the test chamber in dynamic temperature regulation.

Constant temperature energy efficiency calculation:

• Normal temperature test: $C_{1} = E_{1}/V$
• High temperature test: $C_{2} = E_{2}/V$
• Low temperature test: $C_{3} = E_{3}/V$

Variable temperature energy efficiency calculation:

• Heating energy efficiency: $C_{4} = E_{4}/[(t_{2}-t_{1}) \cdot c \cdot V \cdot \rho]$
• Cooling energy efficiency: $C_{5} = E_{5}/[(t_{1}-t_{3}) \cdot c \cdot V \cdot \rho]$

Heat load capacity energy efficiency calculation:

• $C_{6} = P_{1}/P_{2}$