开发了一个数值模型，用于估算隔热或非隔热热水管道的热损失（或热增益）。开发的模型模拟了水、管壁和任何保温材料中的二维温度分布，作为稳定流动或无流动（备用）条件下时间的函数。在一篇配套论文中描述的现场和实验室实验获得的数据与模型的模拟结果进行了比较。可以在相对较短的时间跨度内指定模型流量条件，以便几乎可以对任何绘图计划进行建模。由于能够对一系列参数进行建模，模拟结果可用于对比研究，例如确定隔热和非隔热管道之间的热损失差异，以及计算不同管径对出水温度的影响。 模型模拟还与以前的设计指南进行了比较，并对设计实践和数值模型的使用提出了建议。单位:双引文:ASHRAE交易，第105卷，第。1.

A numerical model was developed for estimating the heat loss (or heat gain) from insulated or noninsulated hot water pipes. The model developed simulates the two-dimensional temperature distribution in the water, pipe walls, and any insulation as a function of time for steady flow or no flow (standby) conditions. The data obtained for field and laboratory experiments described in a companion paper are compared to the simulation results of the model. The model flow conditions can be specified over a relatively short time span so that almost any draw schedule can be modeled. With the ability to model a range of parameters, the resulting simulations can be used for comparative studies, such as establishing the heat loss differences between insulated and noninsulated piping and calculating the effect of various pipe diameters on the outlet water temperature. The model simulations are also compared to previous design guidelines, and suggestions are given for the use of design practices and the numerical model.Units: Dual