The rotation of the engine crankshaft drives the water pump and the fan at the same time. The water pump forces water from the engine's water jacket (the middle layer surrounding the combustion chamber) to the water tank. passes through the gap and returns to the engine. At the same time, the fan is used to cool the water tank, that is, the air-cooled circulating water keeps the water temperature stable and prevents the motor from continuing to heat up. during operation.
The operating principle of solar water heaters
The main principles of automatic circulation of water in heating are:
L Heating water enters and exits through the heating boiler Due to the difference in water pressure, the water boiled by the boiler is transported by the water pump to the heating pipes and then flows to the radiators of every home. Natural circulation is alsocalled gravity circulation. The water circulation in the heating system is divided into two types: gravity circulation hot water heating system and mechanical circulation hot water heating system. The principle is as follows:
Gravity circulation hot water heating system: In hot water heating, a system that uses the difference in density of water at different temperatures as the driving force to circulate is called gravity circulation system.
2. Mechanical Circulating Hot Water Heating System: The system is equipped with a circulating water pump to force circulation of heat transfer fluid through the system. Due to the high water flow rate in the pipe, it has the characteristics of smaller pipe diameter and faster temperature rise than the gravity circulation system. However, due to the addition of a circulating water pumpation to the system, more extensive maintenance work is required and operating costs are also increased.
Can the water in the rockery circulate automatically without electricity?
The working principle of the solar water heater is shown in Figure 1. The Cold water enters the solar water heater through the pipe, passes through the heat collector plate and collects heat. The panels collect solar energy, convert it into thermal energy, then heat cold water. Since the density of cold water is higher than that of hot water, the hot water will automatically increase and then form circulating power. The water will gradually heat up on the heat collecting plate. After reaching a certain temperature, it can enter. the hot water tank. Those who need hot water will be able to get hot water at any time. Heating Figure 2. In fact, theprinciple of solar water heaters mainly includes the following two principles: (1) The principle of water circulation, that is, the water flows automatically. This is based on the fact that cold water is denser than hot water. Cold water flows and hot water rises, forming natural convection that gradually heats the water in the water tank until it reaches the set water temperature. When the intensity of the sun is not sufficient to meet circulation needs, a water pump can be added to the closed water circulation circuit to obtain forced circulation. (2) Collector heat absorption principle: There is a special coating on the collector surface of the solar water heater. This coating has a high absorption rate in the visible range of solar energy. After absorbing it in the form of heat, heat. the radiation from the collector will have the wavelength in the plaage longwave and the coating has low longwave emissivity, thus effectively retaining solar heat. This heat is then used to gradually heat the cold water into hot water. Solar collector tube Let's talk in detail about the collector tube on this collector. The collector tube is actually like an elongated hot water kettle liner. It is made of two glass tubes, one large and one small. the inner layer is covered with a spectrum-selective absorption coating, and straight air is drawn between the inner and outer tubes. It forms the core of the solar water heater and is used to maximize the absorption of thermal energy after solar radiation. The vacuum glass tube is round and has the characteristics of naturally following the broad source of the sun. Coupled with the reflection principle of the reflector, the glass tube can receive light from all sides, the heat collection effect of there longer and the water temperature is higher. even in alpine areas, it can also work normally all year round.
There is no perpetual motion machine unless there is a spring connected to the rockery or there is a lot of rain there. But this is called running water, and it certainly cannot circulate automatically.
There must be a supply of energy. According to the law of conservation of energy, a perpetual motion machine does not exist, so it must be a cycle of electrical energy or other energy sources, such as the windmill. mentioned, which should be used in windy conditions. Yes, solar energy can also be used, there must be a continuous energy supply.
When people go to higher places, water flows to lower places. The water in the rock garden should also flow to a morelow, then be lifted and sent by an electric water pump; it must be continually exchanged and put into circulation, which is both simple and inexpensive; other methods are more complicated and more expensive; . So it is difficult to cycle automatically without electricity.
Detailed information:
Landscaping function
Rockery energy Organize, divide and separate spaces
Use the characteristics of large-scale rockery buildings to separate and divide the garden space, and divide the space into various spatial shapes of different sizes, forms and changes. Through the insertion, separation, inclusion, enclosure and gathering of rock gardens, the flowing space of mountain roads and the closed space of mountain passes can be created in the rock garden areas.
There are unique spatial forms such as spacevaulted cave and the deep space of the canyon. Rock gardens can also direct visitors' view or viewpoint to high or low places, creating a spatial scene looking up and down.
Rockeries can adapt to local conditions and coordinate the environment
Garden rockeries can provide many more types of environments than flat ground. In plastic rock garden areas, different slopes, different slope directions, different lighting conditions, different soil textures and different ventilation conditions can be found everywhere.
This provides many good growing environment conditions for a variety of plants with different ecological habits, which is conducive to improving the ecological quality and plant landscape quality of the areas. of rockery.
Stone rockeries are landscaping sketches and landscapesembellished ges.
Rock gardens and stone landscapes are artistic representations of natural mountain landscapes in gardens. In various environments such as courtyards, garden roadsides, squares, swimming pools, corners and even roof gardens, rockeries and stone landscapes can also be used as garden sketches to beautify the landscape , add interest and play a role in landscaping and landmarking role.
Natural landscapes such as strange peaks and rocks, cliffs, mountains, deep gorges, spring caves, islands and reefs can all be replicated in the garden through rock gardens plastic and stone landscapes.