Assessment of Uncertainties in Energetic and Exergetic Performances of a Flat Plate Solar Water Heater

Table 2

Performance test according to EN 12975 obtained numerically (thin line) and experimentally (bold line).

Experimental time	Ta (°C)		Tin (°C)	(°C)
10 : 34 : 34	18.14	820.77	65.61	4.41–4.60	46.61–49.3	7.17–7.58
11 : 18 : 43	19.51	874.17	75.99	4.32–4.75	42.88–46.7	7.56–8.24
11 : 57 : 53	20.57	856.54	86.03	3.47–3.79	35.21–37.5	6.92–7.37
12 : 44 : 21	18.24	874.90	17.09	7.93–7.73	78.73–77.1	0.83–0.75
12 : 05 : 12	18.80	866.86	17.48	7.89–7.66	79.02–78.4	0.78–0.70
12 : 34 : 54	16.12	929.51	26.37	7.83–7.80	73.09–70.5	3.63–3.46
13 : 19 : 33	17.63	949.10	40.33	7.29–7.59	66.72–67.2	5.87–5.91
11 : 39 : 44	17.38	890.23	50.02	6.51–6.46	63.48–62.0	7.38–7.18
12 : 14 : 52	17.66	924.78	50.76	6.47–6.32	60.72–60.5	7.13–7.06
11 : 35 : 56	19.02	910.34	60.73	6.13–5.79	58.44–55.8	8.21–7.79
12 : 46 : 42	17.47	847.65	65.67	5.18–5.18	53.10–52.1	8.34–18.16
13 : 19 : 07	16.07	852.37	39.59	6.40–6.46	65.21–66.5	5.84–5.93
13 : 59 : 14	17.75	929.24	60.68	6.20–5.86	57.97–56.2	8.37–8.06
10 : 57 : 02	17.35	877.09	75.61	4.61–4.70	45.59–45.7	8.30–8.31