Greenhouse Heating & Engineering by Enerdes®

A balanced heating system in a greenhouse ensures the best possible conditions for a crop to grow. The temperature spread in the greenhouse itself should be within a couple of degrees. 

At Enerdes we guarantee you the best possible solution for greenhouse heating, due to our decades of experience in greenhouse thermodynamics and continuous ambition for innovation.

Greenhouse heating and CO2 Enrichment Enerdes

The Enerdes expertise

Advantages of an Enerdes Greenhouse Heating System

At Enerdes we have been developing and manufacturing heaters and heating systems since 1910. With our extensive experience in the greenhouse industry, agriculture and horticulture, we know how to make a heating system that is completely optimized to your greenhouse and keeps the perfect temperature for your crops.

Enerdes has highly educated engineers who have the knowledge to design an energy efficient and reliable heating system that provides all of your crops with an even heat release.

7 advantages of an Enerdes heating system:

  1. Decades of greenhouse thermodynamics experience
  2. Computational Fluid Dynamics modelling
  3. Improved plant health
  4. Increased crop yield
  5. Better product quality
  6. Reduced risk of plant diseases and mold development
  7. Even growth rate and product quality in all greenhouse areas

Enerdes – experts in greenhouse heating

Greenhouse heating systems by Enerdes

For small, recreational greenhouses, a propane greenhouse heater may be used. For commercial greenhouses or industrial greenhouses, this is obviously not going to provide sufficient heating. Enerdes is a global supplier of greenhouse heating systems for big commercial /industrial greenhouses.

Enerdes designs and installs heating systems in greenhouses that provide the desired greenhouse temperature, with minimal energy losses and minimal operating costs. We also take into account the heating tube-to-plant distance. It is important that the plants are not located in close proximity to heat sources, especially if your crops have temperature sensitive parts. 

Components that can be included in an Enerdes greenhouse heating system:

  1. Boiler room
  2. Cogeneration
  3. Heat storage tank
  4. Tubular heater

1. Boiler room

The main use for boilers is heating the greenhouse. Additionally, the CO2 created in the process is used for CO2 enrichment in the greenhouse. Optionally, production of steam can be integrated as well. Usually, a separate boiler room is built, close to the greenhouse. Heat is transported from the boiler room to the greenhouse and subsequently distributed into all areas. A boiler room is completely filled with an integrated greenhouse heating system that has many components which are all dependent on each other.

Optimal selection and sizing of these components as well as their installation and interconnection is of utmost importance.

2. Cogeneration

There are many ways to produce heat for a greenhouse, but a very smart way is to combine it with the electricity generated for the greenhouse: a process called cogeneration (COGEN). 

A COGEN consists of:

  • Engine
  • Generator
  • Heat exchangers
  • Fuel: natural gas
  • Filter for the exhaust gasses

During cogeneration, electricity is generated for the greenhouse. The by-products heat and the CO2 in the exhaust gasses can be used for the greenhouse as well, in order to save fuel and thus costs.

Enerdes designs cogeneration installations (COGENS) completely optimized to your facility. Our tailor-made cogeneration solutions have total returns as high as 88 -95%. Consequently, this high level of energy efficiency makes the installation cost effective and the more environmentally conscious solution.

3. Heat storage tank

When the produced heat cannot be used directly in the greenhouse, the heat is stored in the heat storage tank. The stored heat can then be used at another moment when there is a demand for heat. 

The heat demand determines the heat storage: no more heat can be stored than can be used in the short term. To minimize heat loss, it is important that the heat demand is correctly matched with the capacity of the boilers and the size of the heat storage tank.

4. Tubular heater

A tubular system will be laid out throughout the entire greenhouse. Pumps and valves are installed, to pump the right amount of water to the desired areas in the greenhouse. Based on the temperature measured by thermostats (temperature sensors hanging at strategic locations in the greenhouse) the pumps and valves are controlled and thus the temperature in all greenhouse areas is meticulously controlled.

Components of a tubular greenhouse heating system:

  • Heating tubes
  • Pumps
  • Valves and butterfly valves with actuators
  • Thermostats/ temperature sensors
  • Pressure valves
  • Greenhouse fans
  • Greenhouse air distribution hoses
Greenhouse heating and CO2 enrichment Enerdes 1

Greenhouse heating and CO2 enrichment for plant health

An adequate heating system is one of the most important components in a successful greenhouse. In order to grow quality crops with a profit, it is essential that the heating system in your greenhouse is energy efficient and robust. 

On top of that air quality is very important for your crops. Part of this is the CO2 concentration in your greenhouse. You can increase the CO2 level in your greenhouse with a CO2 enrichment system. This is beneficial for plant growth and crop yield. At Enerdes we can develop systems that fully integrate heating and Carbon Dioxide enrichment for your greenhouse, saving you a lot of costs.

It is essential to maintain the optimal temperature in your greenhouse for your plant health and growth. Creating a homogeneous temperature distribution in all areas and corners of your greenhouse is beneficial for high quality plants and a high crop yield. 

However, if you do not have a proper lay-out of your greenhouse heating system, it can become very costly to obtain the right temperature. On the other hand, an inferior heating system can lead to crop losses. Some areas may become too hot, others may stay too cold. Plants in different areas of the greenhouse will show different growing rates. Temperature differences will also lead to absolute humidity differences. Consequently, plant diseases and mold development may occur in some areas if heating and cooling systems do not operate adequately.

Temperature controlled greenhouse

In very few climates, it is sufficient to heat your greenhouse with solar energy. In sunny seasons the sun will provide enough light and radiation to heat the greenhouse to the desired temperature. However, in colder seasons like the winter period or during nights, it may be necessary to have additional heating in your greenhouse. 

Temperature control is a major component of the greenhouse climate control system.

Greenhouse heating in the winter

Much additional heating may be required if your greenhouse is located in a climate with serious winter weather.  

Depending on your crop type, the allowed minimum temperature in your greenhouse is determined. With this and your greenhouse type and the greenhouse volume, the required heating system is determined and dimensioned.

Greenhouse snow proof

In climates with regular snowfall, snow protection can be included. A snow-tube circuit is integrated in the heating system, and placed on top of the greenhouse. 

With a dedicated snowmelt system, the snow is melted from the greenhouse roof, without having to open the vents. Snow no longer blocks the light, and your plants can happily grow.

Greenhouse heating and CO2 Enrichment Enerdes

Greenhouse with Boiler Room

Boiler rooms serve to heat the greenhouse, produce CO2, store heat and produce steam for disinfecting material. The boiler room must comply with legal requirements and guidelines.

Many different installations are placed in the boiler room, many of which are dependent on each other and therefore need to be properly coordinated. For example, there are boilers in the boiler room, with flue gas condensers if necessary. But also a CO2 installation, main distribution lines and group divider are often part of a boiler room.

The boilers are used for heating the greenhouse, producing CO2, and possibly steam. A boiler is dimensioned to meet the required heat demand, which is determined by a climate analysis. A boiler can run on different fuels depending on availability and local legislation.

Greenhouse heating and cooling systems by Enerdes

For many climates, additional heating may be necessary in colder seasons, but additional cooling is necessary in the summer. Simply venting may not be enough to dispose of excessive heat and/or lower humidity levels. 

Enerdes greenhouse climate control systems fully integrate both. Our systems save measured temperature and humidity data of your greenhouse and use them to anticipate the heating and cooling demand of your greenhouse. This leads to smooth temperature control in your greenhouse and constant temperature and humidity levels.

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