Heating generally involves two methods: natural circulation and forced circulation.
1. Natural Circulation: Natural circulation is a cyclical process in which hot water rises and cold water falls. The steam-water mixture flows upward through the water-cooled wall and enters the steam drum through the upper header and conduit. Water from the steam drum in the descending channel flows downward and is replenished into the water-cooled wall by the lower header. Such continuous circulation forms the natural cycle.
2. Forced circulation: Forced circulation refers to the forced extraction of water in the heating pipes (water supply pipes and return pipes) through the action of the water pump near the exchanger of heat to obtain water circulation in the heating pipes in the building. Heating achieves the goal of heating throughcirculation and heat dissipation of hot water.
Detailed information:
1. The heating system is blocked; open the exhaust valve to discharge the air in the pipe, close the valve and wait for the system to circulate for a while. .
2. The design of the secondary pipeline network is unreasonable, the water circulation is not smooth, and it cannot be regulated; the insulation of the secondary pipe network is not standardized and the heat loss is too great; If it is radiant floor heating, check if the inlet filter is clogged. If it is clogged, you can close the water supply and return valves of the incoming branch pipe, clean the filter and open the water supply and return valves of the incoming branch pipe. after cleaningyage.
3. The interior decoration of the house affects the heat dissipation of the radiator;
4. The configuration of the indoor radiator is not sufficient and the installation is not standardized; the room is not hot, the radiator vent valve can be opened, just drain the air.
5. The heating installations are in poor condition; the houses are not hermetically sealed and the occupancy rate is low;
Baidu Encyclopedia - Natural Circulation
Baidu Encyclopedia - Forced Circulation
People's Daily Online - Check these reasons why the heater is not hot
< p>The principle of electricity production of a nuclear power plant is as follows: In a nuclear power plant, the reactor carries out nuclear fission and converts nuclear energy in thermal energy of water.
Water, as a coolant, absorbs thermal energymic generated by nuclear fission in the reactor, becomes water at high temperature and high pressure, and then enters the U-shaped steam tube. generator along the pipe, transferring heat outward from the U-shaped water tube, transforming it into saturated steam. Reactors convert nuclear energy into thermal energy for water. The steam generator transfers heat from the high temperature and high pressure water in the primary circuit to the water in the secondary circuit, transforming it into saturated steam.
Nuclear power plants use nuclear energy to produce electricity, and the basic equipment is a nuclear reactor. The nuclear reactor heats water to produce steam, which converts nuclear fission energy into thermal energy; steam pressure drives the steam turbine to rotate, converting thermal energy into mechanical energy; the steam turbine then driveste the rotation of the generator, converting mechanical energy; energy into electrical energy.
Advantages of nuclear power plants:
1. Nuclear power generation does not emit huge amounts of pollutants like fossil fuel-based electricity generation into the atmosphere, so nuclear power generation does not cause air pollution.
2. Nuclear power generation does not emit carbon and will not worsen the global greenhouse effect.
3. The uranium fuel used in nuclear power production currently has no other use than the production of electricity.
4. The energy density of nuclear fuel is millions of times greater than that of fossil fuels. Therefore, the fuel used in nuclear power plants is small and easy to transport and store. The plant can only transport 30 tonnes of uranium fuelby plane in a single flight.