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||Application of a Linear Input/Output Model to Tankless Water Heaters|
|Publication Date:||2011 Dec 31|
|OSTI Identifier:||OSTI 1049226|
|DOE Contract Number:||DE-AC02-98CH10886|
|Document Type:||Journal Article|
|Resource Relation:||Journal Name: ASHRAE Transactions; Journal Volume: 117; Journal Issue: Part 1|
|Research Org:||BROOKHAVEN NATIONAL LABORATORY (BNL)|
|Sponsoring Org:||USDOE SC OFFICE OF SCIENCE (SC)|
|Subject:||15 GEOTHERMAL ENERGY; BOILERS; METRICS; PERFORMANCE; WATER HEATERS|
|Description/Abstract:||In this study, the applicability of a linear input/output model to gas-fired, tankless water heaters has been evaluated. This simple model assumes that the relationship between input and output, averaged over both active draw and idle periods, is linear. This approach is being applied to boilers in other studies and offers the potential to make a small number of simple measurements to obtain the model parameters. These parameters can then be used to predict performance under complex load patterns. Both condensing and non-condensing water heaters have been tested under a very wide range of load conditions. It is shown that this approach can be used to reproduce performance metrics, such as the energy factor, and can be used to evaluate the impacts of alternative draw patterns and conditions.|
|Country of Publication:||US|
|Size/Format:||Medium: X; Size: 683 - 689|
|System Entry Date:||2012 Dec 05|
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