Not the Right Time

Currently Indonesia is experiencing a strange climate condition. It is already July now and in July usually we have dry season with very very little rain. Instead of being very hot and dry, there are still rains throughout Indonesia. The meteorological bureau says that the anomaly is caused by La Nina phenomenon which extend the rainy season in Indonesia.

Basic Hydro Power - Part 4

Understanding the principle of head and flow and the importance to get correct data of them, then it is time to know more about components of a scheme. The basic components of a micro hydro scheme is illustrated below (source: MHP Scout Guide, GTZ Ethiopia).

Basic Hydro Power - Part 3

Suddenly you have to measure the head of a water stream. What kind of method would you use? Before answering such question, let's go back a little bit and review the map. With a quite detailed map someone can determine which position is best for the intake and power house and other components of the plant The planner has to draw a sketch and put the rough layout of the power plant on the map. The map should be quite detail (1:25000 scale might do). From the map, one can make an approximation of the head. Measuring in the field will verify the approximation.

Basic Hydro Power - part 2

We already know that flow of water and the height of water fall (or height difference of water flowing from point A to point B or to be short "head") are the important things one needs to know correctly before deciding to go for hydro power or not. Measuring those two parameters needs special skill. Special skill means one has to understand how to use the method and its weaknesses. Let's discuss about measuring flow of water. There are many ways or methods of flow measurement: current meter method, float method, tracer method (salt dilution/water conductivity for example), sharp crested weir method, gauging station method etc.

Basic Hydro Power - part 1

Well I guess many has already understand better that I do about hydro power, however there are still people who simplify the complexity of hydro power even the micro one. Questions like: if I have 500 liters per second, how much kW would I get, still comes to experts. This kind a thing needs an education and complex explanation of things would not help at all. So, I will try to give very basic understanding of how modern hydro power (micro size maybe to be specific) works. Please correct me if I am wrong.

Hydro power is basically power generation by utilizing water power (in this case in general the potential energy of falling water). Therefore the original use of hydro power is to give movement. Water drops move a water wheel that eventually makes certain mechanism to rotate or move and provide specific service. In the old days many mills are using hydro power directly to give movement to their mill facilities. Old hydro power systems use the weight of the water to move the wheel.