Influence of the Input Parameters Accuracy Defined in the Standard Iso 9459-5 for a Domestic Water Heating Thermosiphon

Vera Medina, Jonathan, Bravo, Isidoro Lillo, Piñero, Laima Reina, Tejera, Sara Moreno

EuroSun 2016 · Palma de Mallorca, Spain · 2016-10-11
Published by International Solar Energy Society (ISES)
DOI: 10.18086/eurosun.2016.06.07

Abstract

The International Standard ISO 9459-5 describes the characterization of thermal performance for domestic water heating systems. The objective of this paper is to analyze the influence of measurement accuracy of some input parameters (inlet water temperature, outlet water temperature and solar radiation) during the test sequences on resulting solar fraction of a domestic water heating system, type thermosiphon, on the different European reference locations (Athens, Davos, Würzburg and Stockholm). A study of the measurement accuracy according to Standard ISO 9459-5 and other values has been carried out. The long-term prediction (solar fraction) for each of the input measurements was determined, and according to these results, a less restrictive measurement accuracy could be propose for a future revision of Standard ISO 9459-5.

Keywords

Solar system, Dynamic testing, Certification

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