论文部分内容阅读
题电热淋浴器分为储水式和无水箱式两种.储水式淋浴器要用较长时间把水箱中的水加热,待水温达到要求后用水箱中的水淋浴;无水箱式淋浴器使冷水流过电热器就达到要求的温度而立即从喷头流出供淋浴.已知冷水温度为16℃,淋浴所需热水温度为38℃.淋浴所需热水流量为4×10-3m3/min,水的比热容为4.2×103J/(kg·℃),家庭照明电路允许通过的最大电流约5A.请你利用以上数据通过计算说明,家庭中不宜使用无水箱式电热淋浴器.
The electric shower is divided into two types: water storage and tankless. The water storage shower takes a long time to heat the water in the water tank. After the water temperature reaches the required level, the water in the water tank is showered; The shower allows the cold water to flow through the electric heater to reach the required temperature and immediately flow out of the shower head for showering. The known cold water temperature is 16°C, and the shower hot water temperature is 38°C. The hot water flow required for the shower is 4×10- 3m3/min, the specific heat capacity of water is 4.2×103J/(kg·°C), and the maximum current allowed through the home lighting circuit is about 5A. Please use the above data to explain through calculation that no tank-type electric shower is suitable for home use.