GB 21519-2008Minimum allowable values of the energy efficiency and energy efficiency grades for electrical storage water heaters (English PDF)

1 Scope

GB 21519-2008 is the Chinese national standard on minimum allowable values of the energy efficiency and energy efficiency grades for electrical storage water heaters, in the field of energy and heat transfer engineering. It carries no /T suffix, which in the Chinese system means compliance is mandatory: a product or a practice within its scope has to meet it to be lawfully made, sold or carried out in China. It was issued on 1 April 2008 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 November 2008. Classification: ICS 27.010, CCS F01. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This Standard specifies the minimum allowable value of energy efficiency, evaluating value of energy conservation, grade of energy efficiency, test methods and inspection rules for the domestic and similar electrical storage water heater (hereinafter referred to as electrical water heater). This Standard is applicable to the electrical storage water heater.

2 Normative References

The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.

GB/T 20289-2006 Electrical Storage Water Heater

3 Terms and Definitions

For the purposes of this Standard, the terms and definitions given in GB/T 20289-2006 and the following apply.

3.1 Minimum allowable values of energy efficiency for electrical storage water heaters According to the test conditions specified by the standard, the maximum 24h natural energy consumption coefficient and the minimum hot water output rate allowed by the electrical water heater.

3.2 Evaluating values of energy conservation for electrical storage water heaters heater to be tested and the tested corner or the position about 1m from the electrical water heater to be tested, whichever is smaller; and locate in half height of the electrical water heater to be tested. The ambient temperature shall be measured under the stable conditions.

c) The relative humidity shall not exceed 85%, and measured under stable conditions. It shall not be taken at the moment when the hot water is discharged from the electrical water heater.

d) It shall be carried out under the rated output power of the electrical water heater to be tested; the deviation shall not exceed ±5%.

e) Influent temperature shall be maintained at 15°C±2°C.

f) Make the electrical water heater in normal installation and use conditions. For the electrical water heater with outlet opened, turn off the water inlet valve of the electrical water heater. For the closed electrical water heater, the water pressure when the water is not drained during the test shall be stable between 0.28MPa and the rated pressure of the electrical water heater; the fluctuation is within the range of ±0.05MPa.

5 Test Methods...