Effect of phase change material on concentric circular tubular solar still-Integration meets enhancement

In this work, a compound parabolic concentrator (CPC)-concentric circular tubular solar still (CCTSS) with phase change material (PCM) is presented. The experiment is conducted with and without PCM in the CCTSS. The PCM is loaded (450 g of paraffin wax/tube) in the specially designed circular trough of the tubular solar still. The water temperature (T-w), air temperature (T-air.), outer cover temperature (T-oc) and fresh water production are measured in frequent intervals of time. The results showed that the fresh water production of CPC-CCTSS with and without PCM integration were 5779 ml/m(2)/day and 5330 ml/m(2)/day. Therefore, the PCM enhanced the fresh water productivity by 8%. (C) 2017 Elsevier B.V. All rights reserved.