The principle of coal-fired power generation includes three main processes: combustion, steam circulation, and power generation. The following is a detailed explanation:

1. 燃燒過程：燃煤機組使用煤炭作為燃料，在燃燒過程中，煤炭在高溫條件下與空氣中的氧氣反應，產生高溫燃燒氣體。這個燃燒過程中產生的高溫氣體包含有大量的熱能。

1. Combustion process: Coal fired units use coal as fuel. In the combustion process, coal reacts with oxygen in the air at high temperature to produce high-temperature combustion gas. The high-temperature gas generated during this combustion process contains a large amount of thermal energy.

2. 蒸汽循環過程：在燃燒后產生的高溫氣體通過鍋爐，將其中的熱能轉移到水中，使得水被加熱并轉化為蒸汽。蒸汽通過高壓管道輸送到蒸汽渦輪上。

2. Steam cycle process: The high-temperature gas generated after combustion passes through the boiler, transferring the heat energy from it to water, causing the water to be heated and converted into steam. Steam is transported to the steam turbine through high-pressure pipelines.

3. 發電過程：蒸汽渦輪接收到高溫高壓的蒸汽后開始旋轉，通過與發電機相連的軸組轉動發電機。發電機中的轉子在磁場的作用下，產生電流，從而將熱能轉化為電能。后，電能通過變壓器升壓后，進入電網供應給用戶。

3. Power generation process: After receiving high-temperature and high-pressure steam, the steam turbine starts to rotate and rotates the generator through a shaft set connected to the generator. The rotor in the generator generates current under the action of a magnetic field, thereby converting thermal energy into electrical energy. Finally, the electrical energy is boosted through a transformer and supplied to the user through the power grid.

總結來說，燃煤機組發電原理就是利用燃燒煤炭產生高溫氣體，將其中的熱能轉移到水中，使得水轉化為蒸汽，再通過蒸汽渦輪帶動發電機轉動，終將熱能轉化為電能供應給用戶。

In summary, the principle of coal-fired power generation is to use the combustion of coal to generate high-temperature gas, transfer the heat energy from it to water, convert the water into steam, and then drive the generator to rotate through a steam turbine, ultimately converting the heat energy into electrical energy and supplying it to users.

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