General chamber view

Calorimetric room for measuring the energy efficiency of household appliances for cooking

Project title

Workstation for measuring the energy efficiency of household cooking electrical appliances.

Project execution time

Project start: 11/11/2014, Project completion date: 02/10/2015

Customer

Belarusian State Institute for Standardization and Certification

PROJECT GOALS
AND OBJECTIVES

The workstation is designed for automated measurements of energy efficiency parameters of household cooking heating appliances (microwaves, ovens, cookers, convection ovens, grills) in accordance with the requirements of EN 60350-1 standards.

The equipment can be used in the following cases:

  • in measuring and certification laboratories and centers;
  • during mass production and control of the parameters of the household heating appliances used for cooking;
  • during the prototypes development of new household cooking appliances.

The Belarusian State Institute for Standardization and Certification got the opportunity to perform household cooking appliances tests on energy efficiency parameters, energy consumption as well as to measure parameters of the thermal capacity of the household appliances for cooking.

PROJECT TECHNICAL
DESCRIPTION

The workstation consists of a thermostated chamber, which can maintain the inside temperature of 23°C ± 2°C with an accuracy of ± 0.5°C.

To measure energy efficiency, household cooking appliances are placed inside the chamber. The chamber turns on and maintains the set temperature conditions within the test volume. The chamber is equipped with six independent 4kW power sources to provide separate supply of devices under test. The chamber includes measuring equipment that allows to measure power consumption of the household electrical appliances, consumption in standby and operation modes, temperature inside and on the body of the product under test with accuracy better than 0.1%. Air circulation in the chamber is created by two centrifugal fans. The air flow is directed vertically through the chamber space.

Cooling in the chamber is realized by means of a compressor and a condenser unit. Chamber heating is achieved by recirculating of cold air through electrical heating elements.

The chamber made of heat-insulating panels, which are joint together and additionally sealed with silicone adhesive. The chamber is equipped with a ventilation and lighting system. Control cabinet of the chamber is located separately in the operator’s room and connected to a personal computer via Ethernet. The chamber is powered by 400V 50 Hz three-phase network. Power consumption of the chamber is not more than 40 kVA. The chamber is equipped with sliding double-leaf doors with dimensions of 2100×1900 mm (the door dimensions may be different at the customer request).

Fully automated workstation allows automatically measure all energy efficiency parameters of cooking appliances and generate reports and protocols in accordance with the chosen measurement program.

The software is written on LabView and has many convenient functions for control, monitoring and analyzing the equipment under test.

SYSTEM
SPECIFICATIONS
Measuring chamber
PARAMETER VALUE
Temperature range of inner chambers +23 ÷ ± 2°C
Temperature measurement accuracy ± 0,5 K
External dimensions of the chamber 4.1 m (L) x 4.8 m (W) x 4.0m (H)
Operating mode round-the-clock
Power analyzer
PARAMETER VALUE
Voltage measurement range 0 ÷ 600 V
Voltage measurement accuracy ± 0,2 % of FS
Current range 0 ÷ 26 A
Current measurement accuracy ± 0,2 % of FS
Power measurement frequency range 0,5 Hz ÷ 100 kHz
Power supplies
PARAMETER VALUE
Adjustable AC output voltage 0 ÷ 300 V
Output frequency 47 ÷ 63 Hz
Output power 0 ÷ 8 kW
Output voltage accuracy ± 1%
THD (total harmonic distortion) less 2 %
Interface RS-232/USB and software
STANDARDS RELATING
TO THE WORKSTATION
SHORT DESIGNATION FULL TITLE
GOST IEC 60350-1 Household cooking electrical appliances. Part 1. Ranges, ovens, steam ovens and grills. Methods for measuring performance.
IEC 60350-1 Household cooking electrical appliances — Part 1: Ranges, ovens, steam ovens and grills — Methods for measuring performance
BS EN 60350-1 Household cooking electrical appliances. Ranges, ovens, steam ovens and grills. Methods for measuring performance
EN 60350-1 Household cooking electrical appliances — Part 1: Ranges, ovens, steam ovens and grills — Methods for measuring performance
STANDARDS RELATING
TO THE WORKSTATION
MEASURING THERMOSTATIC CHAMBER
Power source, 1pc.
Power analyzer
Multichannel temperature and humidity measurement system
Digital thermohygrometer
Anemometer
Stopwatch
Measuring equipment for determining the overall dimensions of the equipment under test (calipers, rulers, roulettes)
Personal computer, printer
Desk, operator’s chair

WE ARE OPEN TO CONTACT AND ALWAYS READY TO UPGRADE OUR HARDWARE AND SOFTWARE AT THE CUSTOMER’S REQUEST

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