1. Generally, the inner tube diameter of 58 is 47, and the inner tube diameter of 47 is 37; 1800 water is about 6.3 catties (0.235*0.235*3.14*18=3.12 liters), 1600 water is about 6 catties, and 1500 water (47) is approximately 3.5 catties< /p>
2. A bucket with an inner diameter of 340 weighs approximately 180 kilograms per meter (1.7*1.7*3.14*10=90.76). liters) and a bucket with a diameter of 360 weighs about 200 kilograms
3 Solar thermal efficiency can be higher. Look at the intensity of the sunlight
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.Hello, in general, 100 watts for a water heater booster pump are more than sufficient. Electric water heater refers to a water heater that uses electricity as energy for heating. It is one of the three main water heaters, alongside gas water heaters and solar water heaters. Electric water heaters can be divided into three types according to powerheating type: water storage type (also called volumetric or thermal storage type), instant heating type and instant heating type (also called semi-water storage type). Although regular instantaneous electric water heaters and dual-mode electric water heaters are similar in size, their internal structures are quite different. Instantaneous electric water heaters are smaller and more powerful than electric storage water heaters, so they are actually faster in terms of heating speed. Electric storage water heaters are faster, but they cannot achieve instant heating in spring and autumn and must be preheated, that is, they have to wait. However, dual-mode electric water heaters can use instant heating mode in spring. summer and autumn, and can be turned on immediately.