Suppose the surface area of the water tank for basking is S,
Then: the heat absorbed by the water in the water tank for 6 h Q1=1.26*1000d /(s*m2)*6* 3600s*S*40%,
The heat absorbed by the water when it heats Q2=cm△t=4.2*1000j/(kg*℃ )*50kg*△t,
< p> ∵Q1=Q2,∴S=[4.2*1000d/(kg*℃)*50kg*△t]/[1 ,26*1000d/(s*m2)*40%],< /p>
When △t= When 30℃, find s1. When △t=40℃, find s2 The range is s1---s2
In this question, thermal efficiency refers. the heat absorbed by the water in the solar tank. The ratio of heat to the heat of solar radiation obtained on the surface, expressed in%.
Note: This question does not take into account direct and oblique sunlight.
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Solar water heater
It must be heated by the sun. Why else would the collector tube be black, because black will absorb light and the heating effect is infrared? The collecting tube is a tubedouble-layer vacuum, the absorbed heat will not come from outside, but the water contained in the inner layer is lost and transferred to the inner tank with the insulating layer. Therefore, the heat absorbed by the collector tube. can only flow in and out, so it continuously absorbs heat to increase the water temperature.
Solar water heater: energy-saving, eco-friendly domestic hot water equipment environmental and affordable
As people pay more attention to environmental protection and energy saving, solar water heaters attract more and more attention. Solar water heater is a water heater that uses solar energy for heating. It is energy-saving, environmentally friendly and affordable, and has become the first choice for domestic hot water equipment.
Advantages of solar water heaters
Solar water heaters presentthe following advantages:
1. Energy saving: Solar energy is an unlimited and free source of solar energy. energy is used for heating without consuming energy, thereby achieving the goal of energy saving.
2. Environmental protection: Solar water heaters will not produce any pollutants and have no impact on the environment. These are very environmentally friendly hot water equipment.
3. Affordable: The price of solar water heaters is relatively low, has a long lifespan and low maintenance costs.
Solar water heater operation steps
The operation of solar water heater is very simple, just follow the following steps:
1 Installation: Install the solar water heater. The electric water heater should be installed in a sunny and well-ventilated place to ensure that the solar electric water heater can fully receive sunlight.
2. Connect the power supply: Connect the solar water heater to the power supply to ensure that the solar water heater can work normally.
3. Open the faucet: turn on the water heater.of the faucet and wait for a while until water flows from the faucet.
4. Adjust the temperature: Adjust the temperature of the solar water heater as needed to ensure that the water temperature meets your needs.
5. Close the tap: After use, close the tap of the solar water heater to ensure that water does not continue to flow.
Maintenance of solar water heaters
In order to ensure the normal operation of solar water heaters, regular maintenance is necessary. The specific maintenance steps are as follows:
1. Cleaning: Clean the inside of the solar water heater regularly to ensure that there is no dirt inside the solar water heater.
2. Inspection: Check the power cord, pipeline and other parts of the solar water heater regularly to ensure that all parts of the solar water heater are working properly.
3. Replace parts: If there is a problem with a certain part of the solar water heater, it should be replaced in time to ensure that the solar water heater can work normally.