热水器类型,温度设置,运行条件和绝缘会影响Legionella生长的生态
Fernando A Roman1, Rebekah L Martin2, William J Rhoads3
1Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States.
ACS ES&T water
|January 16, 2025
概括
具有绝缘或循环的热水器通过保持更高的温度来降低军团菌风险. 无热器的可靠性和效率较低,对于安全的热水来说.
科学领域:
- 环境科学 环境科学
- 公共卫生 公共卫生
- 工程 工程师 工程师 工程师
背景情况:
- 住宅用水加热对能源使用,节水和公共卫生产生影响.
- 控制水中传播的病原体,如军团菌,对于卫生至关重要.
- 不同的热水器类型 (水箱,无水箱,循环) 的性能和安全配置不同.
研究的目的:
- 为了比较无水箱,标准水箱和循环水箱热水器的能源效率和军团菌风险.
- 评估绝缘对热水器性能和安全的影响.
- 为了确定最优的设置,尽量减少病原体的生长,同时确保效率.
主要方法:
- 对三个151升热水器进行比较分析:无,标准和循环.
- 在各种环境下测量能源效率和水温分布.
- 评估在莱吉欧内拉菌生长 (38-47°C) 高风险温度范围内的水量.
主要成果:
- 能源效率顺序:没有油箱 > 标准 > 再循环.
- 无油箱加热器发生故障,无法持续达到目标温度.
- 在48°C时,军团菌风险体积下降:再循环 (150升) >标准 (40升) >无油箱 (~0.47升).
- 在66°C时,循环水箱保持在55°C以上;标准水箱在高风险区域有13升.
- 绝缘显著改善了温度均性,并减少了高风险体积,特别是在66°C的标准中.
结论:
- 再循环和绝缘标准水箱热水器比无水箱或非绝缘标准水箱更好地控制军团菌风险.
- 较高的温度设置 (例如66°C) 与隔热相结合,可以有效地减轻军团菌风险.
- 热水器的选择和配置对能源效率和公共卫生结果都有重大影响.
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