Assessing the feasibility of nighttime water harvesting from solar photovoltaic panels in a desert region

Special Issue on ‘EU PVSEC 2023: State of the Art and Developments in Photovoltaics’, edited by Robert Kenny and João Serra

Open Access

Table 2

Estimated nighttime performance of AWG systems by direct cooling at different desert locations of the World where large-scale solar PV power plants are located. Meteorological data were obtained from ERA5 for the year 2022 [18].

Country – nearest solar park (SP) [20]	Avg temp	Avg specific humidity	Avg n-MHI	Annual operating night hrs	Energy req.
	(°C)	(g_w/kg_a)	(−)	(%)	(kWh/L)
Morocco − Noor Boujdour SP	18.32	11.12	0.49	96.31	0.31
UAE − MBR SP, Dubai	26.08	12.76	0.43	84.95	0.45
India- Bhadla SP, Rajasthan	26.2	12.57	0.40	69.67	0.58
China − Tengger SP, Ningxia	18.02	8.29	0.36	65.99	0.68
USA − Moss SP, Arizona	20.76	8.59	0.34	61.52	0.67
Namibia − Omaruru SP, Omaruru	19.26	8.65	0.34	56.07	0.94
Australia −Powell Creek SP, N.Territory	29.03	10.03	0.27	43.96	1.07
Chile − Llano De Llampos SP, Atacama	17.88	6.31	0.22	15.77	1.29

n-MHI were calculated under the assumption that the AWGPV panel is set at 4 °C for the whole night. Favorable night hours were calculated by considering the number of night hours >0.3. Energy Requirements were calculated assuming COP = 5 during the night operation for 1 yr.

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