Economy

Let’s compare economic efficiency of VIH and tubular electric heater (TEH) operation. Your heating system is ready. You have to choose a “heart” of your heating system. For example, you have got a private house with 240 m2 area, 3 m ceiling height, heat-isolated glued laminated lumber, vinyl windows, insulated floor and roof, etc.

Initial data of the house and climatic parameters:
Total heated area: 240 m2 or (720 m3).
The coldest period: (t),-34°С (according to Construction Rules and Regulations).
Temperature in the house: +25°С.
Electricity cost: (2,7) rub./kW.
Heating season: 222 days (according to Construction Rules and Regulations).
Electric heater VIH-20 power - 20 kW.
An average monthly temperature in the street during the coldest month is -20°С. An average monthly temperature during a heating season is -5,6 °С.

 

 
VIH
TEH
NOTES
Power

20 kW
  380V

24 kW
  380V
The tubular electric heater loses its effectiveness while operation due to its coefficient of efficiency decreasing.
Heater cost  
50 000 rub.
30 000
  35 000 rub.
difference in price is paid off during the first heating season
Heat power loss 
0
15 - 20 % per a year
The VIH coefficient of efficiency doesn’t decrease during its operation period due to the absence of scale
Electric energy saving during operation 
from 30 to 50 %
0
VIHs really reduce operating costs on electric energy

A new tubular electric heater on 24 kW and 380 V is required for the heating of the house with 240 m2 area because the tubular electric heater loses its effectiveness while operation due to the formation of scale on its heating units and its coefficient of efficiency decrease. If you choose a vortex induction heater for this house heating you need the VIH with 20 kW power.

Monthly expenses on electricity

Expenses on electric energy:
24 kW × 8 hours per a 24-hours period × 30 days × 2,70 rubles for 1 kW = 15 500 rubles
per a month = 108 500 rubles per a heating season.
The second year of operation
The tubular electric heater loses up to 15% of its thermal power during the second year of operation. The time of total continuous work correspondingly increases.
24 kW × 9,2 hours per a 24-hours period × 30 days × 2,70 rubles for 1 kW = 17 880 rubles
per a month = 125 160 rubles per a heating season.
The third and the forth years of operation
The tubular electric heater loses about 25% of its thermal power. It means that the time of its work increases again.
24 kW × 11,5 hours per a 24-hours period × 30 days × 2,70 rubles for 1 kW = 22 356 rubles
per a month = 156 492 rubles per a heating season.
VIH
It is enough to use VIH-20 for the same house heating. Its effectiveness doesn’t decrease and its heating expenses are unchangeable during all the period of its operation.
20 kW × 8 hours per a 24-hours period × 30 days × 2,70 rubles for 1 kW = 12 960 rubles
per a month = 90 000 rubles per a heating season.
Expenses per a heating season will be unchangeable during the all period of the VIH operation.

Comparison

Great number of heating units. High probability of one or several tubular electric heaters failure with partial or complete loss of a TEH function.

Great number of sealing joints (tubular electric heaters and flanges). There is the necessity of constant control.

If water treatment is poor intensive scale deposit and the clogging of a boiler and a system with sludge occurs because of high watt load on the TEH surface.

Great number of electric contacts (TEHs and flanges) in the zone of high temperature action requires constant maintenance of appropriate electric contact. It leads to the system complication.

Life time of the TEH depends on a heat carrier quality (1000 hours without taking actions on water softening, 5000 hours – with taking actions).

High cost of operation. There is the necessity of TEHs, shims and semiconductor switches periodic replacement.

 

The heater reliability is almost absolute due to the absence of heating units.

Absence of sealing joints. 
Scale and deposit formation is practically impossible because of low load in combination with the action of alternating magnetic field and high-frequency vibration on a heated surface when magnetization reversal.

Absolute absence of electric contacts in the zone of high temperature action doesn’t require special measures to maintain appropriate electric contact.

The VIHs haven’t got high-temperature units and a heat-exchange apparatus. Temperature difference between the heat exchanger case and the heat carrier is not more than 10-15°С. Life time is more than 30 years without special service (100000 hours).
Low cost of VIH operation (it doesn’t require repeated maintenance and unit replacement).

 

 

 

 

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