Water cooling: Heat generated inside the body is carried away by the circulation of water inside and outside the body.
Air cooling: Use one or more large fans to force exhaust air toward the body to dissipate heat.
Principle: For motors with the same technical parameters, water cooling is small in size, light in weight, has high water density, water heat exchange performance is better than those of wind, and the cooling effect of water of the same volume is better than that of wind.
Those with higher power are usually water cooled, while those with lower power can be air cooled. Air-cooled generators have better environmental adaptability and can adapt to all application environments, while water-cooled engines have more requirements approximatelymentalities, complex structures and high prices.
It is difficult and unprofitable to make a small hydroelectric generator yourself.
To obtain high efficiency from a small 1000W hydroelectric generator, an impact hydroelectric generator set can be selected.
The impulse hydraulic generator set is also called horizontal hydraulic generator set. Like the oblique impact hydraulic generator, it is a hydraulic generator with high water head and low flow. The required water height range is: 7-40. meters. It is suitable for use in high mountain areas. Its working principle is as follows: in the hydraulic turbine, the jet coming out of the nozzle is not in the tangential direction, but in the direction forming a certain angle with the plane of rotation of the It enters the bucket from one side of the slide, then exits through theleaf from the bucket from the other side. The main features of the impact hydroelectric generator set are:
1. Under normal water conditions, water resources can be reasonably used to generate electricity.
2. If there is a rainy and dry period and there is no water, the diesel engine can be used to generate electricity.
For a small hydroelectric generator of about 1 kW, the market price is about 1,000 yuan. It is much cheaper and faster to buy it directly than to make your own.
For small hydroelectric generators of around 1 kW, the most important thing to consider is its operational stability and reliability. It is recommended not to think too much about efficiency. After all, for a unit with a power of 1 kW, the difference between the power of 70% and 60% is 100 W. There is no need to invest more for 100 W.