Greenhouse energy storage equipment

How was a conventional greenhouse heated?

The conventional greenhouse was heated using fuel oil No. 6. For the ATES system electricity was used to run the fan coils and pumps for groundwater circulation. The coefficient of performance (COP) for the ATES system for heating and cooling for this period were 7.6 and 3.2, respectively.

How does Ates work in a greenhouse?

The basic concept of the ATES system utilized the heat stored from summer to heat the greenhouse during winter, as well as the cold stored in winter for cooling during summer. The greenhouse is the ‘solar collector’ to store heat on sunny days. Temperatures in the greenhouse varied between 40–60 °C about 6 hours/day for 5 months in this climate.

What type of gas is used in a greenhouse?

Fuel oil, kerosene, liquid petroleum (LP) gas, or natural gas is used as fuel. Central heaters use one or more boilers in a central location and distribute steam or hot water into the greenhouse through pipes. Distribution pipes can be placed in a number of ways depending on the growing technique. Overhead pipe coils are placed above the plants.

How does a greenhouse aquifer work?

Winter air colder than 10 °C is the source for cooling. In summer, the fan coils transferred heat from air in the greenhouse to groundwater extracted from the aquifer for heat storage. In winter, these units distribute the heat stored in the aquifer to the greenhouse.

How to control high humidity in a greenhouse?

In the conventional greenhouse, the easiest way of controlling high humidity is by ventilation. On colder days, this has to be combined with heating to sustain the required temperature. Humidifying and cooling can be done at the same time in evaporative cooling systems.