Authors:

M.I.R. Abdunnabi
Center for Solar Energy Research and Studies, Tajura, 19.0. Box 12932 Tripoli
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D.L. Loveday
Department of Civil and Building Engineering, Loughborough University Loughborough. Leics, LE11 3TU, UK

Abstract:

This paper reports on a project carried out by the Centre for Solar Energy Research and Studies (CSERS) to familiarize Libyan people with solar water heating technologies. Around 100 solar water heaters have been installed in the domestic sector and selected systems were equipped with monitoring instruments required to evaluate thermal performance. The paper presents the results of data collected over a one year period from a system installed in a family residence situated in a village located 90 km south of Tripoli (Libyan capital). The results showed that the system solar fraction was 55.8% of the average amount of daily hot water withdrawn (144 liters) at an average withdrawal temperature of 46.6 °C. The total energy withdrawn during the whole year was 1557 kWl1. It is concluded that such a system is not adequate in terms of cost effectiveness for the current installed situation. It is recommended that the annual solar fraction for any solar water heating system should be over 70% in order to achieve cost—effectiveness and to help wide spread take—up of this technology.

Keywords:

field study, in-situ measurements, solar water heating, system performance

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"In-Situ Measurements of the Performance of Thermosyphon Solar Water Heating Systems in Lihya"