a.Gas Boiler

Its thermal efficiency (referring to the percentage of the heat generated when the fuel fed into the boiler is completely used to produce steam or heat water or other working fluids) is generally65-85%Between them, take the middle value70%The calorific value of hot air is generally taken as37620kJ/Nm3.To obtain100kWThe amount of natural gas that needs to be input per hour is:（100 × 3600) ÷ (37620 × 0.7)=13.67 Nm3, if calculated based on the average price of natural gas2.10element/Nm3 calculations, the hourly natural gas cost is28.71Yuan, running on a daily basis8Calculated on an hourly basis, the daily operating cost of the unit is calculated229.68Yuan.

b.Air source heat pump unit

Its heating efficiency is generally in the range of3.2-4.0Between them, take the middle value3.6To obtain100kWThe heat requires input of electrical energy100 ÷ 3.6=27.78KW, which means an hourly electricity consumption of 27.78Kw · h. If calculated based on the average industrial electricity price of 0.75 yuan/kW in major regions, the hourly electricity cost is 20.84 yuan. If calculated based on 8 hours of operation per day, the daily electricity cost for unit operation is 166.68 yuan.

c. Water (ground) source heat pump unit

The heating efficiency ratio is generally between 4.5-5.0, with a median value of 4.75. To obtain 100 kW of heat, it is necessary to input electrical energy of 100 ÷ 4.75=21.05 kW, with an hourly electricity consumption of 21.05 kW • h. Calculated based on the average industrial electricity price of 0.75 yuan/kW • h in major regions, the hourly electricity cost is 15.78 yuan. Calculated based on 8 hours of operation per day, the daily electricity cost for unit operation is 126.24 yuan.