Research Article
Energy and Economic Analysis of Curved, Straight, and Spiral Flow Flat-Plate Solar Water Collector
Table 2
Comparison of the SWH with different geometry flow tubes.
| Flow tube geometry | Research finding | Reference |
| Twist tape | 9.29 higher than conventional SWH | [37] | Helically twisted tape | Collector efficiency improved by 3.9% | [38] | Dimple tube | The average temperature is 69°C | [39] | Left-right twisted tape | Instantaneous efficiency is found (85%) | [40] | A zigzag pattern | 62.90% efficiency was obtained | [41] | Circular flow pipes | 65% efficiency was obtained | Present study | Spiral flow pipes | 73% efficiency was obtained | Present study |
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