id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-1350	Anifantis, A.S.	Performance Assessment of Photovoltaic, Ground Source Heat Pump and Hydrogen Heat Generator in a Stand-Alone Systems for Greenhouse Heating 	2017	6	.pdf	application/pdf	3185	149	56	Furthermore, the first system increasing the greenhouse temperature by 6°C to 10°C compared with the ambient conditions, while the second system by 3°C to 7°C. Keywords: Stand alone renewable energy system; Ground source heat pump; Hydrogen burner; Greenhouses heating. 0 100 200 300 400 500 600 700 0 0,2 0,4 0,6 0,8 1 1,2 0 2 4 6 8 10 12 14 16 18 20 22 0 2 4 6 8 S o la r ra d ia ti o n ( W /m 2 ) P V E ff ic ie n cy Time in hours ηPV measured ηel,H2 measured IT measured 514 Figure 4: Fuel cell electric power, ground source heat pump and hydrogen burner heating powers.	cache/cet-1350.pdf	txt/cet-1350.txt