Evaluation of service hot water distribution system losses in residential and commercial installations: Part 2 -- Simulation and design practices

Conference · Thu Jul 01 04:00:00 EDT 1999

OSTI ID:20002304

Stewart, Jr, W E; Saunders, C K; Dona, C L.G.

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.

• Research Organization: Univ. of Missouri, Kansas City, MO (US)
• OSTI ID: 20002304
• Report Number(s): CONF-990102--; ISSN 0001-2505
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
COMMERCIAL BUILDINGS
DESIGN
HEAT DISTRIBUTION SYSTEMS
HEAT LOSSES
HOT WATER
MATHEMATICAL MODELS
PIPES
RESIDENTIAL BUILDINGS
THERMAL INSULATION
WATER HEATING