Science – Society – Technology
Table 1 Economic and energy evaluations for a large greenhouse and a group of seven small greenhouses assumed to be supplied by heat extracted from geothermal water; Central part of the Polish Lowlands, Uniejów-Poddębice zone (Barbacki et al. 2017)
Parameter | Unit | Consumer (type of facility) | |
|---|---|---|---|
Large greenhouse | Small greenhouses (group of 7) | ||
Cubic capacity | [m3] | 225,000 | 98,000 |
Usable area | [m2] | 15,000 | 1,400 |
Height | [m] | 15 | 7 |
Central heating requirement | [kW] | 2,400 | 361.2 |
Hot water preparation requirement | [kW] | 16 | 18.9 |
Energy demand (central heating, hot water) | [GJ/y] | 21,800 | 3745 |
Design parameters of the heating installation | [°C] | 70/50 | 70/50 |
Design parameters of the installation for hot water preparation | [°C] | 60/20 | 60/20 |
Investment expenditure | [PLN]a | 2,416,000 | 380,100 |
Fixed costs (assumed technical service life of the installation: 20 years) | [PLN/y] | 120,800 | 19,005 |
Variable costs | [PLN/y] | 1,454,420 | 249,155 |
Total costs | [PLN/y] | 1,575,220 | 268,160 |