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Performance of a Commerical Hot Water Boiler



Cheol D. Park, S T. Liu


In responding to ASHRAE SPC 155P's interest and to provide additional evidence on the envisioned linear relationship between output and input of a boiler under part load conditions, the National Institute of Standards and Technology undertook to conduct a series of computer simulations utilizing a revised version of a computer simulation program, DEPAB2, which was developed previously by NIST for commercial fire-tube steam boilers. The computer program was modified so that it can be used to simulate the operations of a commercial fire tube hot water boiler, and actual boiler specification data from a leading boiler manufacturer was obtained and used as input data to the program for the simulation study. In this paper, the computer model of a commercial hot water boiler and the actual boiler specification are described. Full and part-load performance of the simulated, commercial hot water boiler is presented. A good correlation between output energy and input energy is found. Based upon the correlationship, a suggestion is made to reduce experimental burden in testing the performance of commercial boilers.
NIST Interagency/Internal Report (NISTIR) - 6226
Report Number


boiler, boiler computer model, boiler part-load performance, building technology, commercial boiler, fire tube boiler, hot water boiler


Park, C. and Liu, S. (1998), Performance of a Commerical Hot Water Boiler, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed March 3, 2024)
Created November 1, 1998, Updated February 19, 2017