Effect of Installation of Solar Collector on Performance of Balcony Split Type Solar Water Heaters

Table 4

Performance of all-glass evacuated tubular collector at a surface slope angle of 90°.

Date	Single row horizontal arrangement					Single row vertical arrangement
	Jan. 24	Jan. 25	Jan. 28	Jan. 29	Jan. 30	Jan. 23	Jan. 24	Jan. 25
Ambient temperature (°C)	21.7	16.6	14.6	14.7	15.6	16.3	17.2	16.6
Average wind speed (m/s)	0.5	0.7	1.3	1.6	0.7	1.4	0.6	0.7
Irradiance (MJ)	17.7	15.8	17.2	16.4	17.1	17.0	17.4	15.8
Time (hr)	6.0	6.0	6.0	6.0	6.0	6.0	6.0	6.0
Initial temperature of tank (°C)	14.4	12.7	12.7	13.1	13.6	15.2	13.8	14.2
Final temperature of tank (°C)	40.7	37.3	39.7	39.6	41.8	36.4	35.9	34.0
Temperature rise (°C)	26.3	24.6	27.0	26.5	28.2	21.2	22.1	19.8
Tank volume (L)	120	120	120	120	120	120	120	120
Efficiency	0.565	0.595	0.600	0.617	0.629	0.475	0.483	0.480