开发了一种燃气商用热水器，该热水器通过在冷凝模式下运行来实现高效率。实验室测试表明，稳态效率高于95%，待机损耗低于1.0%/h。为了验证在实际使用条件下达到了这一性能水平，在全国具有代表性的商业场所对九个冷凝式热水器原型进行了现场测试。本文对现场试验结果进行了介绍、分析和讨论。与传统设计相比，冷凝式热水器在提高效率和相应的气体节约方面具有明显的优势。 还对现场数据进行了分析，为了解使用条件和模式对热水器性能的影响提供了有用的见解。单位:双引文:研讨会，ASHRAE交易，1987年，第93卷，第。田纳西州纳什维尔2号

A gas-fired commercial water heater has been developed, which achieves high efficiency by operating in the condensing mode. Laboratory testing has demonstrated a steady-state efficiency above 95% and standby losses less than 1.0 %/h. To verify that this level of performance is achieved under actual usage conditions, nine prototype models of the condensing water heater have been field tested at representative commercial sites across the country. The results obtained in the field tests are presented, analyzed, and discussed in this paper. The demonstrated advantages of the condensing water heater in comparison to conventional designs are described in terms of efficiency improvement and corresponding gas savings. Analyses of the field data are also presented, which provide useful insights into the effects of usage conditions and patterns on water heater performance.Units: Dual