Technical Specifications for Energy Conservation Product

Document Sample
Technical Specifications for Energy Conservation Product Powered By Docstoc

        Technical Specifications for Energy Conservation Product

             Certification for Household Automatic Rice Cooker

     China Certification Center for Energy Conservation Products


                                     Issued 28 April 2001

                                 Implemented 1 May 2001

1 Scope
Applied to rice cookers with a rated power of 2000 W or less.

3 Definition
3.1 Efficiency
    Efficiency refers to the ratio between the heat obtained in the rice cooker water and the amount of
electricity consumed in the tested period of time, according to conditions laid out below.

4 Technical Requirements

4.1 Rice cooker efficiency shall not be less than the values shown in Table 1.
4.2 Rice cooker input power shall not vary ≤+5%,≥-10%。
4.3 The actual rice cooker volume must not be less than 95% of the rated volume.

                                                 Table 1
                        Rated Power(P)                      Heat Efficiency(η)
                                 W                                    %
                              P≤400                                   84

                            400<P≤600                                 85

                            600<P≤800                                 86

                            800<P≤1000                                87

                            1000<P≤2000                               88

5 Test Method

5.1 Test conditions
5.1.1 Electricity voltage
5.1.2 Test conditions
    Relative humidity:45%-75%;
    Barometric pressure:86kPa-106kPa;

    Ambient temperature:20℃±2℃,The testing room must have no air circulation or radiant heat
5.1.3 Test equipment
     The thermo-couple thermometer should have a wire diameter of no more than 0.3mm.
5.1.4 Water
     The test uses potable water。
5.1.5 Rice cooker initial conditions
     Before each test, the inner pot, heating surface, and rice cooker exterior must not be within 5K of the
ambient room temperature; alternatively, the rice cooker must not have been used for at least 6 hours.
5.1.6 Control
     The test is conducted in normal rice cooking mode.
5.2 Test method
5.2.1 The rice cooker test method is as follows:
      At the time of measurement, the water temperature should be the same as the ambient temperature.
Pour in a measured (weight) amount of water until it reaches 80% of the rated volume of the rice cooker.
Measure the water initial temperature T1 . Insert the thermo-couple through the rice cooker lid so as not
to influence normal operation of the rice cooker, and ensure placement so that it is positioned 10 mm
above the center of the cooker inner pot bottom,then turn on the electricity as rated in section 5.1.1. Use
the watt-meter to measure the energy consumption。When the water inside the inner pot reaches 95℃,
immediately turn off the electricity, and record the electricity consumption. After the electricity is turned
off, the temperature of the water in the inner pot may continue to rise. Watch the temperature to the
point that it peaks and begins to fall, and record the highest temperature value T2 。Calculate efficiency
according to formula(1):

                 1.16G1(T2-T1)                           CG2(T2-T1)
       η=                                                              ……………(1)
                                          100% +                         100%
                         E                                    3.6E
of which:
η—heat efficiency,% ,precision to 0.1%;
G1—test water weight,kg;
T1 —test water initial temperature,℃;
T2 —test water highest temperature,℃;
C —Specific heat of material of inner pot,kJ/kg       K;
G2—Weight of inner pot,kg;
E—electricity consumption,Wh 。
    The rice cooker heat efficiency must accord with Table 1.

6 Sampling and evaluation
7 Parts and Materials