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

Table 4

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

ROME	Greenhouse		PV greenhouse		Difference		Variation
Month	Heating	Cooling	Heating	Cooling	Heating	Cooling	Heating	Cooling%
January	15774	0	13918	0	1856	0	11.77	0.00
February	8519	0	7755	0	765	0	8.98	0.00
March	2211	0	1723	0	488	0	22.06	0.00
April	179	13443	51	2904	128	10539	71.56	78.40
May	0	37213	0	20247	0	16966	0.00	45.59
June	0	58891	0	39235	0	19655	0.00	33.38
July	0	83357	0	57570	0	25787	0.00	30.94
August	0	70657	0	44271	0	26386	0.00	37.34
September	0	33263	0	14270	0	18993	0.00	57.10
October	14	8680	3	762	12	7918	81.17	91.22
November	3248	0	2581	0	667	0	20.53	0.00
December	11048	0	9891	0	1158	0	10.48	0.00