Energy storage in greenhouses

Does a greenhouse need thermal energy storage?

To provide climate stability inside a greenhouse (especially in terms of indoor temperature and humidity), Thermal Energy Storage (TES) systems are required. They both reduce the heat demand of the greenhouse and stabilize a desired indoor micro-climate for plants cultivated inside.

How much energy can a greenhouse space heating system store?

The results reveal that the system is able to store 331.9 GJ energy in non-heating season, and 208.9 GJ of this energy is successfully utilized in the greenhouse space heating. The electrical COP of the entire system is calculated to be 8.7, which is even better than conventional heat pump heating system.

Can energy-saving strategies be used in agricultural greenhouses?

In agricultural greenhouses, employment of energy-saving strategies along with alternative energy sources has been identified as a potential solution to address the intensive energy consumption of these cultivation facilities.

How can net-zero energy greenhouses save energy?

Advances in Net-zero energy greenhouses and their heat storage are presented. Geothermal heat can save primary energy in greenhouses by more than 20%. Use of STES systems can improve the indoor air temperature by 3–5 °C. PCMs mitigate the energy consumption of net-zero energy greenhouses by 30–40%.

How much energy does a greenhouse need?

They used an energy balance method considering the soil heat storage with a contribution share of 13–19% for heating load requirements. From the results, it was found that the air mass flux of 0.012 kg/s.m 2 can culminate in nearly 84% of the diurnal energy requirement of the greenhouse to maintain the indoor air temperature at 18 °C.

How much energy can a greenhouse system save?

The maximum COP was attained as 16. From TRANSYS simulation, it was found that the system can save thermal energy as 46.2 kWh/m 2 of the greenhouse area per year while maintaining the indoor temperature at 12 °C. Economic assessment approved the system’s profitability.