Ratio Control

From eqn [9] it follows that keeping L/V constant will reduce variations in the concentration. Figure 12 shows this ratio control implemented. Usually one cannot directly measure the vapour flow V, but a reasonable estimate can be made in many ways, for example from a static heat balance over the condensor:

Figure 12 Ratio control between vapour flow and reflux flow.

in which AHc is the heat of condensation and cwater is the specific heat of water.

Although this estimate of the vapour flow is not dynamically correct, the quality controller can be tuned such that the control scheme works well.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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