Heilongjiang is located in the northeast of China, and is named after Heilongjiang in the northeast of the province. Heilongjiang’s 40-ton hot water boiler has three uses, one is centralized heating, the other is hot water supply for process, and the last one is heating water supply. A 40-ton hot water boiler is cheap, but not environmentally friendly; burning natural gas is environmentally friendly, but not cheap. Recently, some customers in Heilongjiang have consulted how much more expensive is a 40-ton gas hot water boiler than 40-ton coal hot water boiler?
Comparison of energy consumption
1, 40 tons of gas-fired hot water boiler for 1 hour
Gas boiler gas consumption calculation formula: gas boiler 1 hour gas consumption = gas boiler power * 3600s / fuel heating value / thermal efficiency
We know that the conversion success rate of a 40-ton hot water boiler is 28MW, and 1 hour is equal to 3600s. The calorific value of natural gas is generally between 40.88MJ / M3-39.82MJ / M3, we take an intermediate value of 37MJ / M3. The thermal efficiency of the gas boiler produced by Zhengguo can reach 92%. Then if you put in a formula, you can get:
40-ton gas-fired hot water boiler for one hour: 28MW * 3600S / 37MJ / 92% = 2961M3 / h
If natural gas is 3.8 yuan / cubic
1 hour fuel cost = 2961M3 / hx3.8 yuan / cubic = 11251.8 yuan
2, 40 tons of coal-fired hot water boiler 1 hour coal consumption
Calculation formula for coal consumption of coal-fired boilers: coal consumption per hour of boiler = boiler thermal power * 3600 / combustion value of coal / boiler efficiency
The thermal power of a 40-ton coal-fired boiler is 28MW. The calorific value of bituminous coal is generally between 27170 and 37200kj / kg. We take the intermediate value of 22.3MJ / kg to calculate. The thermal efficiency of a 40-ton coal-fired boiler is about 82%. Formula: 28MW * 3600 / 22.3MJ / 82% = 5512.4KG.
If it is calculated at 500 yuan / ton of coal, the fuel cost of a 40-ton coal-fired hot water boiler for one hour = 5.5124KGx500 = 2756 yuan
From the above, it can be seen that, from the perspective of fuel costs, the price of coal-fired boilers is much lower than gas-fired boilers. But this does not mean that gas boilers are not good. Gas boilers are superior to coal-fired boilers in thermal efficiency, environmental performance, and operation. No matter which fuel boiler has advantages and disadvantages, enterprises should choose their own boilers based on their actual conditions.
