Cycle Construction

Introduction

In this chapter we shall map a simple water/steam cycle.

Inserting the boiler

We start with the steam generator. Click on the steam generator symbol (the next entry in the component bar) and select "Steam generator (5)". Move the mouse pointer to the position where you want to insert the steam generator and click on the left mouse button. A steam generator symbol is inserted in the drawing.

The steam generator you just have inserted is still highlighted. You can now proceed in the following ways:

• If you click with the left mouse button outside the steam generator, another steam generator will be inserted. Since you do not need another one, delete it by pressing the "Delete" key.
• Click the right mouse button to close the insert mode or
• Click the left mouse button on the steam generator to close the insert mode.

Now you are in normal edit mode.

• Move the mouse pointer over the steam generator. The name (in this case created automatically) and the component number will be displayed in a so called tool-tip window.
• Click with the left mouse button on the steam generator. You are now able to move this component (note that you have to click on the yellow body of the component for this action, and not on connection lines or handle points).
• A click on the right mouse button opens the context menu for the component.
• Click with the left mouse button on one of the eight small handle points of the component. Now you can enlarge or even rotate the image.
• A double-click on the steam generator opens the property sheet for the component. Close it again by clicking the Cancel button.

Inserting the Control Valve

The next component you are going to insert is a control valve. This is necessary, because in the design mode the steam generator determines the life steam pressure and the steam turbine determines its inlet pressure. Therefore, a pressure separator, namely the control valve is required. To insert this component, click on the throttle in the component bar and select "Control valve(14)".

For your further work, it may be convenient to enlarge you drawing. You can do this by using the zoom combo box in the tool bar (enter a number or select one), or by clicking the "100 %" button to the right of the combo box. This button always resizes your drawing to fit to the window, if it is maximized. If you want to expand your drawing, use the ">>" button to enlarge the visible region. To enlarge a section of the drawing, draw a catching frame with the right mouse button (keep the right mouse button pressed down until the rectangle indicates the section you want to enlarge).

Inserting a steam pipeline

In the next step, draw a connection between the steam generator and the control valve. This is very easy in EBSILON^®Professional:

• just double-click on the life-steam outlet of the steam generator (the black square of the red upper left one - the outlet is always the black connection point),
• drag the mouse to the inlet of the control valve (the inlet is always the white connection point) and
• click with the left mouse button.

The connection pipe will be drawn and normalized automatically (shown as rectangular). If it is not normalized, activate the checkbox ”Normalized Pipes” by selecting "View →Normalized pipes" in the menu bar. The red lines indicate the steam lines.

The meaning of the connection points of a component can be retrieved by the ”Component Properties” window (double-click on the component). In this screen on the right, point the mouse pointer to a component to know what it is.

Inserting the steam turbine

In the next step, insert the steam turbine. Click on the turbine icon in the component bar and select "Steam turbine(6)". Draw a connection from the control valve outlet to the steam turbine inlet. You will find the right connection point at the turbine, because EBSILON^®Professional does not allow you to connect at a wrong one.

Inserting the generator

Insert the generator by selecting the entry ”Insert→Component→Motors/Generators→Generator”. Connect the mechanical shaft (thick green line) to the turbine shaft outlet. Additionally, double-click on the electric outlet and draw a short line (double-click to finish the line). This is useful, because you surely want to connect a value field later to display the generator power.

Inserting the steam turbine condenser

The steam turbine condenser can be found in the heat exchanger section (7th entry in the component bar). Insert it below the turbine and connect one of the turbine's steam outlets to the steam inlet of the condenser.

Connect the short water pipes (the blue ones) at the cooling water inlet and outlet (the connection points on the far right). This is required for the specifying and displaying the cooling water states.

Inserting the pump

The last component is the pump. It is the sixth entry of the component bar.

Connect the condenser's water outlet (bottom) to the pump inlet and the pump's water outlet to the feed water inlet of the steam generator.

Now the drawing work is ready and we can try to perform a calculation.