1, users stay at home for a long time, and the electric boiler heater runs continuously for 24 hours. In order to save operation cost, the heating temperature of electric boiler at night should be reduced appropriately.
The heating cost of electric boiler is 0.06kw/m2× 0.6x10h×140 days× 0.48 yuan /kWh = 24.2 yuan/m2.
2, office workers, electric boiler users are only at home at noon and at night, and the electric boiler heating furnace stops running during the three periods.
The heating cost of electric boiler is: 0.06kw/m2× 0.6× 6h×140 days× 0.48 yuan /kWh = 14.5 yuan/m2.
3. The office implements a 5-day working week, and the electric boiler only heats from Monday to Friday. During the day, the electric boiler runs the heating furnace, and the rest of the time, the electric boiler runs in an anti-freezing state.
The heating cost of electric boiler is 0.07kw/ m2× 0.6× 6 hours× (140 days× 5/7 )× 0.48 yuan /kWh = 12. 1 yuan/m2.
4. In school, electric boilers have 35 days' holiday besides 5 days' work week, and the heating time of electric boilers is relatively short.
The heating cost of electric boiler is: 0.07kw/ m2× 0.6× 6 hours× [(140-35 days )× 5/7 ]× 0.48 yuan /kWh = 9. 1 yuan/m2.
With the above calculated value × the actual heating area (usable area) of the room, the operating cost of the electric boiler in the whole heating period can be roughly calculated. If the electric boiler user reasonably adjusts the electric boiler or turns off the heater of the electric boiler that does not need to heat the room (such as idle guest room, bathroom or kitchen), the actual heating area of the electric boiler will be reduced accordingly, and the heating cost of the electric boiler will also be reduced accordingly.
Note: 0.07kw/ m2 is the requirement of standard energy-saving buildings. The heating load of electric boiler in winter is 55-70 W/m2. 0.48 Yuan/kWh is the unit price of residential electric boilers in Beijing in 2000. If the peak-valley electricity price is implemented, the operating cost of electric boiler can be calculated at an average of 0.35 yuan/kWh, and the heating cost of electric boiler users at home for a long time is 17.6 yuan.
The heat load coefficient of 0.6 means that the indoor heat load required at the beginning and end of the heating period is small, and it is large at the coldest heating period, with an average of 0.6.
Actual heating area: (building area ×0.78)- actual area of unheated room.
The electric heating furnace works intermittently, similar to electric water heaters and air conditioners, and the working time is directly proportional to the heat load demand of the room.
The electricity price, heating cycle and daily working hours of electric heaters are different in each region. For example, although the weather in Northeast China is cold, the insulation measures of his home are better (the wall is 0.5 meters thick, the external insulation material is double-layer vacuum glass), and the electricity bill is also cheaper, so the heating bill is much less than that in Shandong and Beijing.
For example:
A set of three bedrooms and one living room with a building area of 100 square meter and a usable area of 78 square meters. If users stay at home for a long time, the operating cost of electric heating is as follows:
If all rooms are heated and the heating temperature is reduced when sleeping at night, the heating cost is about 24.2 yuan/square meter according to the Beijing electricity bill of 0.48 yuan/kwh;
If the user turns off the radiators in the kitchen, bathroom and idle two-bedroom apartment, the actual heating area will become 40 square meters, and its heating cost will become about 14 yuan/square meter.
Parameter description
The rated outlet/inlet temperature of hot water is 85℃/65℃ (the outlet/return temperature of piezoelectric hot water is 95℃/70℃).
Working pressure: normal pressure (the pressure of piezoelectric hot water boiler is 0.7MPa/3.0MPa).
Automatic adjustment range of heating (stepless automatic temperature regulation): 10- 100%
Power supply: 220V50HZ, 380∨50Hz.
Allowable outlet temperature: 85℃ (specification requirements
The boiler water quality shall meet the requirements of GB 1576-200 1 Water Quality of Industrial Boilers.