Show simple item record

contributor authorKlaus Pottler
contributor authorMarkus Eck
contributor authorEduardo Zarza
contributor authorKlaus-Jürgen Riffelmann
contributor authorNicole Janotte
contributor authorEckhard Lüpfert
contributor authorRobert Pitz-Paal
date accessioned2017-05-09T00:40:43Z
date available2017-05-09T00:40:43Z
date copyrightAugust, 2010
date issued2010
identifier issn0199-6231
identifier otherJSEEDO-28431#031003_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/144755
description abstractParabolic trough concentrating collectors play a major role in the energy efficiency and economics of concentrating solar power plants. Therefore, existing collector systems are constantly enhanced and new types were developed. Thermal performance testing is one step generally required in the course of their testing and qualification. For outdoor tests of prototypes, a heat transfer fluid loop (single collector or entire loop) needs to be equipped with measurement sensors for inlet, outlet, and ambient temperature as well as irradiance, wind speed, and mass or volumetric flow rate to evaluate the heat balance. Assessing the individual measurement uncertainties and their impact on the combined uncertainty of the desired measurement quantity one obtains the significance of the testing results. The method has been applied to a set of EuroTrough collector tests performed at Plataforma Solar de Almería, Spain. Test results include the uncertainty range of the resulting modeling function and exemplify the effects of sensors and their specifications on the parameters leading to an uncertainty of ±1.7% points for the optical collector efficiency. The measurement uncertainties of direct normal irradiance and mass flow rate are identified as determining uncertainty contributions and indicate room for improvement. Extended multiple sensor deployment and improved calibration procedures are the key to further reducing measurement uncertainty and hence increasing testing significance.
publisherThe American Society of Mechanical Engineers (ASME)
titleInfluence of Measurement Equipment on the Uncertainty of Performance Data from Test Loops for Concentrating Solar Collectors
typeJournal Paper
journal volume132
journal issue3
journal titleJournal of Solar Energy Engineering
identifier doi10.1115/1.4001476
journal fristpage31003
identifier eissn1528-8986
keywordsUncertainty
keywordsTemperature AND Fittings
treeJournal of Solar Energy Engineering:;2010:;volume( 132 ):;issue: 003
contenttypeFulltext


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record