本研究針對14戶台南地區用戶進行家用金屬集熱板式太陽熱水器之全年耗能及用水調查。並對南部地區69位用戶進行太陽熱水器之安全性、使用維護狀況、滿意度與使用困擾之問卷調查。研究結果顯示: 1.由調查案例之實際熱水用量來看,每人每日之熱水用量在冬季為50公升、夏季為28公升、全年為36公升。2.家用太陽能熱水器於使用階段各案例之耗能量小於瓦斯熱水器,全年平均年度(m3)熱水供應所產生之耗能量為15010.4 kcal/ m3,僅為瓦斯熱水器三分之一左右。3.以液化瓦斯熱水器為比較對象,其平均回收年限約為10年,以都市瓦斯熱水器比較則為15.5年。 4.大部分案例於使用階段均較瓦斯熱水器所產生之CO2 排放量低,平均值為每度熱水供應排放出4.5 kg- CO2,較之瓦斯熱水器低,僅為其一半左右。 5.調查案例之耗能量及CO2排放量,最高與最低例相差22倍左右。 6.為降低家用太陽能熱水器耗電,應以冬季用水狀況進行系統規劃,用戶亦應依用水習慣降低自動加熱時數並降低溫度設定以減少無效加熱耗電。 7.超過七成用戶對家用太陽能熱水器持正面評價。大多數用戶沒有使用控制裝置或調整設定的習慣,亦沒有定期維護太陽能熱水器的習慣。
In order to understand the average annual consumption of hot water and electrical power of domestic solar water heater (DSWH), this research investigated 14 cases in Tainan. This research also made questionnaires to 69 users in southern Taiwan, the issues of questionnaire including safety, using situation, maintenance, user’s satisfaction, and complaints, etc. The significant research results are as follows: 1.The annual average hot water consumption is 36 liters per person per day, but 28 liters in summer and 50 liters in winter. 2. The annual average energy consumption of DSWH is 15010.4 (kcal/cubic meter of hot water), two third lower than the gas water heater (GWH). 3. Compared with LPGWH, the average Payback Period of surveying cases is about 10 years, and it was 15.5 years when compared with NGWH. 4. The annual average CO2 emission is 4.5 (kg-CO2 / cubic meter of hot water), only half to GWH. 5. The highest energy consumption and CO2 emission among the surveying cases is 22 times as much as the lowest one. 6. There are rules to decrease the consumption of energy, including users shortening the schedule time of electrical heating, setting the moderate temperature of electrical heating. 7. There are over 70% users who are satisfied with DSWH. But most users never adjust the control system, nor maintain the DSWH regularly.