Every economical owner is interested in how much power his electrical appliance consumes. The power consumption of the refrigerator is determined by a number of indicators. For example, the freezing power depends on it. The power of the refrigerator is also affected by overall productivity, energy consumption and energy efficiency. The presence of additional functions also affects the studied parameter.
The power of household refrigeration units and what it depends on
Refrigerator power consumption is the total amount of electrical energy that it consumes during operation. This electrical appliance consists of other devices that also consume energy: compressors (one or more), heaters, fans.
The considered parameter consists of:
- the capacities of the above devices, the external dimensions of the refrigerator;
- thermal insulation seal;
- the presence of additional functions and the presence of the No Frost system;
- the amount and temperature of food placed in the refrigerator;
- operating conditions and time of year.
There is an average power of the refrigerator, which is stated in the instructions. Its size in most cases does not exceed 250 watts. Along with this power, you may encounter the real power of the refrigerator. It is capable of reaching 500 watts. The most significant share of energy consumption is determined by the power of the compressor of the refrigerator.
How is the capacity of a refrigerator measured? Of course, in units of power well known in physics – in watts (W). In order to determine the indicator of the average power of an electrical appliance, it is necessary to establish how much electricity in kilowatts the unit consumes per day.
To find out by measuring how much power the refrigerator has, you can use a device called a multimeter. This meter measures the refrigeration circuit while the compressor is running. The values that you get must be multiplied by the value of the mains voltage, equal to 220 volts. Although it must be taken into account that when the compressor is started, a current will flow through the circuit that is 2-3 times higher than the nominal voltage value. In view of this, the resulting readings will require multiplication by 3.
A special sticker should inform about the power consumption of the refrigerator, which is often located on the outer wall (sometimes in the chamber) of the electrical appliance. You can find the same data in the instruction manual that comes with your household appliance.
In the above manual, as a rule, they indicate the maximum power (it is fixed at the moment the compressor is turned on) and the power of the refrigerator, which is called the nominal average. The standard values for these capacities are as follows: 0.3 kW per hour for the maximum and from 0.1 to 0.2 kW per hour for the average nominal. The use of the concept of maximum power consumption is due to the fact that the compressor operates intermittently. This happens only after special sensors signal a change in temperature.
Refrigerator freezing power
The freezing power is measured in kg/day. Different devices have different capacities and freezing technologies, so, for example, the Indesit brand can handle 30 kilograms per day, LG can cool up to 17 kg of food in the same time period, Bosh and Atlant 20-22 kg. In the instructions, the parameter is marked with an X and three ***, it can also be found on the information line pasted on the refrigerator.
The efficiency class is usually understood as a conditional indicator that characterizes the consumption of electrical energy by a refrigerator. To designate this class, capital Latin letters were adopted: starting from A and ending with G. The following three classes have recently been added to the old 7 classes (A +++, A ++ and A +). The efficiency of these classes is higher than A. Thus, the capacity of the refrigerator in kWh per year for the LG brand, belonging to class A, is 350-360 kW per year.
The values that are given for these letters determine the average power consumption of the refrigerator. This so-called average refrigerator power input for a class D refrigeration unit is taken as 100%. Relative to this class, the energy consumption values measured in kW per hour are 55% less for class A, 65% for A+, 85% for A++ and 95% for A+++. For convenience, refrigerator manufacturers highlight all the classes in question with a color. The differences between the classes in the electrical energy they consume are significant.
Recommendations for reducing the energy consumption of the refrigerator
There are a number of recommendations aimed at reducing the energy consumption of your refrigerator.
- It is important to open the door of the household appliance in question for the shortest possible time and the minimum number of times.
- Its ventilation grilles must be kept open. It is known that the air that heats its rear wall needs absolutely free circulation so that the electrical appliance we are studying can be turned off as rarely as possible.
- Before moving into the device in question, the products must be allowed to cool.
- Ice that accumulates in the freezer, on the evaporator, must be removed at least once a month.