subject: Gas, Electricity, Solar Water Heaters Use More [print this page] As people continue to enhance environmental awareness, more and more consumers preferred Solar water heaters However, many people use this product are not very understanding. Here, we will be solar Water heater , Water Heater And Gas Water Heater Performance as a rough comparison.
1, hot water production areas
Gas water heater with 5 liters, 7 liters, 8 different models of upgrades, is in the water temperature within 1 minute at 25 hot water produced by the amount, if the water temperature is 25 , then every minute 50 hot water can be produced 5 liters, 7 liters or 8 liters.
Marked electric water heaters is 30 liters, 60 liters, 90 liters, etc., which refers to the capacity of water heaters, the equivalent of adding our stove a kettle, the water bottles containing 30 liters of water is , 60 liters, 90 liters. Take an 8 liters of gas water heater with a 40-liter electric water heater compared to 8 liters of gas water heater can continuously produce eight liters of water per minute, while electric water heaters need to heat a can of water a half-hour intervals. If the tank water is used up, wait about half an hour.
Solar water heater in accordance with the annual average temperature of 15.7 , annual sunshine hours 2014 hours, the total annual global solar radiation was 111.59 kcal / square meter, if the collector area of 2 square meters of solar radiation on the energy absorption 9.37 106 kJ, 35 according to the calculated temperature rise (based on water temperature 10 ), a full year to provide domestic hot water (45 ) 53.5 tons per person per bath with hot water about 50 kg, then the year 1070 people can wash an average of 2.93 times a day washing.
2, heating speed
Current production of gas water heaters are mostly water heater, no matter when, just want to use hot water, open the gas valve and faucets, hot water will flow out. The electric water heater power about half an hour in advance in order to get started. Solar water heater when the weather is fine to use better, the best floor in the six to eight layers.
3, temperature stability
Gas water heater because it is rapidly heated, and to adjust the temperature device, simply use the beginning of the temperature transferred to the body comfortably, then it will have been maintained at this temperature constant supply of hot water.
Electric water heaters in use need to take a cold water pipe Duiru additional cold water, continue to flow when the tank water, cold water being added, the temperature will gradually decline, until all is cold water. Therefore, when used, need to constantly adjust the ratio of hot and cold water.
Solar water heater to use is not yet great convenience to Sheung Shui, and can not guarantee always have hot water.
4, power side
Gas water heater power much larger than the electric water heater, take an 8-liter 40 liters of gas water heaters and electric water heaters compared to 8 liters gas water heater's power is equivalent to 16-17 kW, and 40 liters of the water heater general 3 kW, which is why gas water heater can cause a continuous supply of hot water. So, whether electric water heater can be made into 16 kilowatts for? It is not possible because household meters, wires can not afford.
V. prices
8 liters of gas water heaters generally cost 800 yuan, plus installation fee, about 1,000 yuan, or even close to 2,000 yuan. Electric water heaters are now more than 500 yuan, plus installation costs, generally less than 1,000 yuan. The price of solar water heaters are more than 3,000 yuan.
Use of cost, now is 1.7 yuan per cubic meter of natural gas, to 0.44 yuan per kilowatt, while solar water heater only costs.
