Operating expenses

The calculation of the operating cost of an electric boiler for one square meter during the entire heating period:

Heat load per unit area × heat load factor × electric boiler working hours per day × number of days in the heating period × unit price of electricity = electric boiler heating cost per unit area in the entire heating period.

The heating operation status of electric boilers can be divided into the following types:

1. If the user is at home for a long time, the electric boiler heating furnace runs uninterruptedly for 24 hours, and the heating temperature of the electric boiler at night is appropriately lowered to save operating costs.

Electric boiler heating costs: 0.06kw/square meter × 0.6 × 10 hours × 140 days × 0.48 yuan/kWh = 24.2 yuan/square meter

2. For office workers, users of electric boilers are only at home at noon and at night, and the electric boiler heating furnace runs intermittently in 3 periods.

Electric boiler heating costs: 0.06kw/square meter × 0.6 × 6 hours × 140 days × 0.48 yuan/kWh = 14.5 yuan/square meter

3. Office, 5-day working system, electric boilers are only heated from Monday to Friday, electric boiler heating furnaces operate during the day, and the electric boilers operate in antifreeze state during the rest of the time.

Electric boiler heating costs: 0.07kw/square meter × 0.6 × 6 hours × (140 days × 5/7) × 0.48 yuan/kWh = 12.1 yuan/square meter

4. In schools, electric boilers have a 35-day holiday in addition to the 5-day work week. The heating time of electric boilers is relatively short.

Electric boiler heating costs: 0.07kw/square meter × 0.6 × 6 hours × [(140 days-35 days) × 5/7] × 0.48 yuan/kWh = 9.1 yuan/square meter

Using the above calculated value × the actual heating area (usable area) of the room, the operating cost of the electric boiler during the entire heating period can be calculated approximately. If the user of the electric boiler reasonably adjusts the electric boiler or closes the room that does not require the electric boiler (such as idle guest rooms, toilets) (Or kitchen) electric boiler heater, the actual heating area of ​​the electric boiler will be correspondingly reduced, and the heating cost of the electric boiler will be correspondingly reduced.

Note: 0.07kw/square meter is a standard energy-saving building. The winter heating heat load of electric boilers is 55-70w/square meter. 0.48 yuan/kWh is the unit price of electric boilers for residential use in Beijing in 2000. If peak and valley electricity prices are implemented, the average price can be 0.35 yuan/ Calculating the operating cost of the electric boiler, the heating cost of the electric boiler at home for the electric boiler user for a long time is 17.6 yuan.

The coefficient of heat load of 0.6 means that the heat load of the indoor demand is small at the beginning and end of the heating period, and the heat load of the indoor demand is larger during the coldest period of the heating period, with an average of 0.6.

Actual heating area: (building area × 0.78)-the practical area of a room that does not require heating.

Electric heating stoves work intermittently, similar to electric water heaters and air conditioners. The working time is proportional to the heat load demand of the room.

The unit price of electricity, heating cycle, and daily working hours of electric heating stoves in each region are different. For example, although the weather in Northeast China is cold, the insulation measures of his house are better (the wall is 0.5 meters thick, the external insulation material is applied, and the windows use double fans. Vacuum glass), electricity costs are also relatively cheap, so the heating costs are much less than in Shandong and Beijing.

for example:

A three-bedroom and one-living room with a building area of 100 square meters has a practical area of 78 square meters. If the user is at home for a long time, the operating cost of electric heating is as follows:

If all rooms are heated and the heating temperature during sleeping at night is lowered, the heating cost is about 24.2 yuan/square meter based on 0.48 yuan/kWh in Beijing;

If the user turns off the radiator in the kitchen, the bathroom and the idle two bedrooms, the actual heating area becomes 40 square meters, and the heating fee becomes about 14 yuan/square meter.