IEC 60456 Washing Machine-Dishwasher-Water Heater Energy Efficiency Test System

IEC 60456 Washing Machine-Dishwasher-Water Heater Energy Efficiency Test System

Laboratory introduction:

This laboratory consists of a performance laboratory, a functional laboratory and an equipment room. The performance laboratory provides a stable temperature and humidity environment for the performance test of washing machines, dishwashers and water heaters through an insulated warehouse and an attached air reprocessing unit. The constant temperature water system and related measurement and control systems are used to operate the washing machines, dishwashers and water heaters under the specified temperature and humidity environment. The energy consumption and other performance of washing machines, dishwashers and water heaters under relevant standards are tested. And the testing requirements for the inspection and certification of related washing machines, dishwashers and water heaters are met.

Standards:

IEC 60456; EN 60456 Washing machines for household use-Methods for measuring the performance

GB/T 20290 2016 Dishwasher energy efficiency water efficiency limit value and grade;

EN 50242 Method for measuring performance of household electric dishwasher;

IEC 60436/2015 Standard Test method for performance of Household Electric dishwashers;

QB/T1520-2013 Electric dishwashers for household and similar purposes;

BS EN50440:2015+A1:2020 Efficiency of domestic electrical storage water heaters and testing methods

Consist of the Laboratory:

• Performance test laboratory
• Operating room
• Storage room
• Equipment room
• Control room

Performance laboratory:

• 4 test stations;
• One set of cold water and hot water circuits, with supporting circuits, valves and faucets;
• One reference dishwasher; one washing machine;
• Each station is equipped with sensors for temperature, humidity, water temperature, water pressure and flow rate;
• One Yokogawa WT310 per station;
• Each station is equipped with 10 thermocouples;
• Each station is equipped with 1 AC power socket and 1 variable frequency power socket;
• Drainage ditch and grate;
• One set of constant temperature and humidity air conditioning unit;
• One set of ceiling and air duct;
• One set of indoor lighting system

Operating room:

• One precision electronic balance and one ordinary electronic balance.
• One titrator.
• One ironing machine.
• One clothes dryer machine.
• Whiteness meter.
• One oven; (the following is for dishwasher only)
• One microwave oven;
• One meat grinder;
• One operating table;
• A set of chemical reagent bottles (due to international transportation restrictions, chemicals cannot be transported and need to be purchased locally by user).

Storeroom:

• A refrigerator.
• 2 lockers.

Equipment room:

• One 1m³/h pure water machine;
• One high-temperature water tank and one constant temperature and pressure water supply system;
• One low-temperature water tank and one constant temperature and pressure water supply system;
• One set of automatic water hardness adjustment systems;
• Matching power supply system;
• One variable frequency power supply with 15kW single-phase output;
• Two sets of related tool boxes and three tool carts (ordinary trolley, manual hydraulic trolley, mobile trolley).

Control room:

• One control cabinet.
• One set of computer and control system.
• One set of computer desks and chairs.

Sample type:

The external size of UUT is not larger than (width*depth*height) 1000mmΧ1000mmΧ1500mm 

Test contents (Dishwasher):

• Electricity consumption
• Water consumption
• Washing performance
• Drying performance

Test contents (Washing Machine):

• Power consumption
• Water consumption
• Cleaning ratio
• Washing wear rate
• Dehydration performance
• Rinse performance

Test contents (Water Heater):

• Rated capacity (weighing method)
• 24h inherent energy consumption
• 24h inherent energy consumption coefficient
• Hot water output rate

Laboratory room technical parameters:

• Test room body: 75mm thick 0.6mm thick double-sided ivory white color steel plate flame retardant polyurethane panel;
• Test room body dimensions: 4200*4500*3000mm;
• Test room door: W(800+800)×H2200mm;
• LED ceiling lights are installed in the room;
• Install a single-phase variable frequency voltage-stabilized power supply and a mains socket at the test station;
• The performance laboratory is equipped with a constant temperature and humidity precision air conditioner, temperature control: 23±2 degrees, 20±2 degrees; Humidity control: maintain indoor humidity at 30~70RH%: (55±5)%RH, (60±5)%RH, 65±5RH%.
• The floor of the laboratory is made of concrete, waterproof, paved with anti-skid tiles, and a drainage trough is opened on the ground. The trough surface is covered with stainless steel grates. The distance between the grates is 20mm. It is made of SUS304 square tubes (25mm*25mm*1.5mm) (constructed by the user);

Constant temperature and pressure water supply system:

• According to the requirements of relevant standards: different specifications and different categories of samples have different water temperature requirements during testing. In order to meet the requirements and facilitate use, the water supply system provides two water supplies: one low-temperature water and one high-temperature water. The low-temperature water and high-temperature water are heated by heat pump plus power-assisted internal circulation. Each is equipped with a 1m³stainless steel inner tank insulation water tank. The water supply temperature, pressure and hardness are adjustable.
• Water temperature range: low-temperature water: 10-35℃±1℃;
• Water pressure range: 0.24±0.05MPa;
• Water hardness range: 0～5mmol/l±0.2mmol/l, automatically adjustable;
• Pure water machine: 1 m³/h;
• The 4-way water supply of the performance test station is equipped with an electromagnetic flowmeter, water supply temperature and water supply pressure measurement.

Control and parameter measurement system

The control and parameter measurement system mainly consists of "parameter display instrument and operation control cabinet" and "computer data processing system".

Control cabinet

• Control various test operations, and directly measure various parameters such as the temperature and humidity of the laboratory environment, the water consumption, electricity consumption, water pressure, and water temperature of each tested washing machine through the sensor and send them to the meter for display. All key control instruments, sensors, data collectors, etc. adopt high-precision brand-name products to ensure data reliability and test accuracy. The parameters are as follows:
• Environmental temperature and humidity measurement: temperature -10～60°C±1°C, humidity 10～90% ±3%.
• Electricity consumption measurement of washing machine:
• Model Number: Yokogawa WT310 Multifunction Meter (One of them with harmonic function).
• Specification: Voltage, current, electric energy.
• Measurement precision: 0.25% FS＋±0.25 reading.
• Water pressure measurement:0～0.5MPa±0.5%FS.
• Water temperature measurement: Pt100, transmitter, resolution 0.1°C.
• Water flow measurement: Yokogawa AXG series, 3 L/min～100L/min±0.5%FS.

Data processing system (Dishwasher):

• The software is based on the Windows operating system. It is compiled using C#. It has a rich graphical interface. In addition to tables, it can also be displayed and printed in a trend chart.
• The laboratory test display report data includes all (thermocouple temperature, ambient temperature and humidity, power, voltage, current, frequency, etc.). Automatic collection and automatic display, with historical data query function, can be consulted and printed at any time (including during the test).
• All key data acquisition cards, communication cards, etc. are brand-name products. Ensure the reliability of data and the accuracy of the test.
• The software window interface is displayed in English. It has a friendly human-computer interface. It can record and store data in real time. Completely realize paperless operation. The operation may not be easy to understand, but the operation is stable and reliable.
• Data collected directly through communication include: laboratory ambient temperature and humidity, voltage, current, humidity, water pressure, water temperature, and water volume.
• The data of the reference dishwasher and other analytical instruments are manually input.
• The computer automatically calculates and processes the directly collected and manually input data, and automatically generates and saves the results in a report.
• Other requirements are based on the software provided by the supplier, and the specific operation is negotiated by both parties.

Power supply:

• Power supply for the test room: Party A provides 100kVA to Party B's electric control cabinet
• Power supply for the machine under test: single-phase variable frequency regulated power supply 15kVA (test station)
• Test power supply characteristic requirements: voltage stability: ≤1%; frequency stability: ≤0.5%;

Software display: