An alternative heat source for apartments or country houses is an electric heating boiler. In a clear dependence on the type of heating elements, the electric boiler can be used in an apartment for heating water and heating. What are the criteria for choosing a heating boiler?
Content
Electric boiler and its construction
Structurally, the electric boiler represents a container consisting of a metal tank and reinforced electric heaters (TEN), a control and adjustment unit for the heating system. In most cases, when purchasing a heating boiler electric, its configuration consists of a circulating pump, expansion tank, safety valves, filter and a programmer.
Controls the operation of the boiler control unit. The heating temperature is monitored by the room controller, which reacts to the lowering of the room temperature by the activation signal of the corresponding mode. Thus, based on the emerging need for heating, the internal sensor maintains the required temperature regime. The boiler heating mode stops when a certain temperature is reached.
When choosing a heating boiler, for an apartment, it is necessary to pay attention to the presence on the front side of the housing of the regulator of the temperature regime of the coolant, the indicators for switching on the heating and power supply. The most popular, at present, are electric heating boilers, two-circuit.
Principle of boiler operation
It's no secret that the principle of operation of existing electric boilers is based on the physical conversion of electrical energy into thermal energy. Such conversion is possible with the help of heating elements, reliably mounted in the capacity of the heat exchanger. Further transfer of warm water is carried out by a circulation pump.
The main parameter, which you need to pay attention to when choosing a boiler, is the power parameter. The capacity of the heating elements is assumed to be equal to the capacity of the electric boiler. Two or three heaters can be installed in the boilers. Therefore, the power of electric boilers is from 2 kW and can reach 60 kW.
The basic criteria for choosing an electric boiler
When choosing a model of an electric boiler, for heating and hot water supply of an apartment, it is necessary to be guided by the geometric dimensions of the boiler, the power and the amount of energy consumed.
The main parameters when choosing a boiler are:
• power of heating elements
• Productivity
• heat storage capacity
• Voltage and current
• cross-sectional area of the electrical cable.
Electric heating elements are designed for a strictly defined value of rated power and voltage.
During operation, the heating system, the power of the heating elements can be adjusted by changing the resistance of the heater Rn. And the supply voltage is UH. Heating elements up to 1 kW are single-phase, more than 1 kW - three-phase.
Unlike gas heating boilers, electric performance is more significant, besides the control is more convenient and simpler. There is no need to clean the heating system of fumes and soot.
Before going to the store to buy a heating boiler, it does not hurt to get acquainted with the technical characteristics of the models. This will help to produce a heating boiler ideally suited to the conditions of use in the apartment.
However, the use and application of any home appliances requires reasonable technical calculation.
What is the heat engineering calculation for?
The electric boiler has sufficient heat capacity, which ensures the replacement of the heat losses of the room. The "power" factor depends on the variety of components that must be taken into account in the heat engineering calculation. The purpose of heat engineering calculation is the selection of the value of the replacement of the heat loss of the room.
Thermotechnical calculation is approximate, taking into account the total area of the heated space, the quality of thermal insulation and structure, as well as the overall thermal conductivity. So, the calculation of the heating of a private house by an electric boiler will have a different character compared to the calculation of an apartment.
Heat engineering calculation of an apartment is made by the formula:
W = S x W / 10m2
Where:
W - power of the electric boiler (kW)
S - area of the calculation room (m2)
Wud is the specific capacity of the boiler per 10 sq. M., Taking into account the correction factors for each region.
correction factors of calculation
Wud - for northern areas 1,2-2
Wud - middle lane 1 -1.2
Wud - for southern regions 0,7-0,9
So, to heat a room with a total area of 150 m2 for the middle lane, an electric boiler with a capacity of 150 x 1/10 = 16 kW will be needed.
After a technically sound selection of an electric boiler and its subsequent application, the question arises as to how to install an electric heating boiler.
How to install a heating boiler
To install the boiler, it is recommended that you contact a qualified specialist company. Moreover, the installation of an electric boiler requires special permission and coordination of the relevant authorities and organizations.
An obligatory condition for the installation of an electric heating boiler is the connection in the mains through the RCD and the circuit-breaker input circuit-breaker. In this case, the automatic shutdown of the boiler from the mains will be guaranteed in case the voltage is higher than the allowable voltage. The electric boilers are unpretentious to the installation site and do not require additional devices or devices. Most models of electric boilers are a ready-made mini boiler house.
The only condition for operability is the correct connection to the heating system.
To connect the boiler to the heating system, pipes are used: traditional upper pressure and lower return. After the connection of all elements of the system, the operability of the controllers is adjusted.
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