Steam Boiler

Bent Tube Boiler or Sterling Boiler

In this lesson we will discuss the bent tube boiler or sterling boiler. In the last chapter we have discussed the cross drum boiler.

Bent tube boiler or sterling boiler

Bent Tube Boiler or Sterling Boiler is the developed version of water tube boiler. The working principle of bent tube boiler is more or less same as other water tube boilers, but it utilizes four drums.

Construction of Bent Tube Boiler
Three drums are placed on the heat source as shown on the figure. Fourth drum is placed inside the heat chamber and this fourth drum is connected to upper three steam drums with help of bend water tube. Upper three drums are connected with equalizer tubes as shown in the figure. Steam is taken from equalizer tubes. Working Principle of Bent Tube or Stirling Boiler
The feed water first enters into right most upper drum. Due to more density this water comes down in the lower water drum. The water within that water drum and the connecting pipes to the other two upper drums, are heated up and consequently steam bubbles are produced.

Now after construction we will discuss the working principle of Bent tube boiler
Working Principle of Bent Tube or Stirling Boiler
The feed water first enters into right most upper drum. Due to more density this water comes down in the lower water drum. The water within that water drum and the connecting pipes to the other two upper drums, are heated up and consequently steam bubbles are produced. This is the most basic working principle of bent tube boiler .

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