Photovoltaic Greenhouses: Comparison of Optical and Thermal Behaviour for Energy Savings

Table 5

Monthly heating and cooling consumption (kWh) for soil-less tomato cultivated in PV and glass greenhouse located in Ragusa, with the difference (kWh) and the saving (variation percentage).

RAGUSA	Greenhouse		PV greenhouse		Difference		Variation %
Month	Heating	Cooling	Heating	Cooling	Heating	Cooling	Heating	Cooling
January	577	0	517	0	60	0	10.33	0.00
February	149	0	111	0	38	0	25.47	0.00
March	164	7372	93	730	71	6643	43.23	90.10
April	0	18560	0	4821	0	13739	0.00	74.02
May	0	41945	0	24305	0	17641	0.00	42.06
June	0	60700	0	41294	0	19406	0.00	31.97
July	0	78880	0	54848	0	24032	0.00	30.47
August	0	72675	0	46982	0	25693	0.00	35.35
September	0	48951	0	25404	0	23547	0.00	48.10
October	0	20986	0	5563	0	15423	0.00	73.49
November	61	0	44	0	17	0	28.29	0.00
December	306	0	251	0	55	0	17.87	0.00