|
|
Omar Hawit, P.E., Westlake Reed Lesksoky
|
|
|
Chris Wilson, P.E., Westlake Reed Leskosky
|
|
|
Trevor Jaffe, P.E., Westlake Reed Leskosky
|
The heating, ventilation, air conditioning and refrigeration industry shows a trend toward increased adoption of condensing boilers in heating systems, but the full impact on design and construction is complex. The maximum efficiency of condensing boilers can significantly exceed that of non-condensing boilers at lower return water temperatures. However, in order to reach lower return water temperatures, coils must be properly selected. A standard coil selection exhibits a tendency to produce a smaller change in temperature with lower water temperatures. As a result, pumping energy increases due to the increased flow required to supply the same heat energy. This paper investigates the effect on overall system performance and construction cost of various heating system metrics with regards to condensing and non-condensing boilers.
