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When: Friday 14^th June 2019, 09:00 – 16:00

Koppert Cress

Koppert-cress is a greenhouse company in Monster. For their climate control they rely on a high temperature aquifer thermal energy storage (ATES) system. Koppert-Cress is one of the 2 permit holders in the Netherlands allowed to store heat at higher temperature than the legal maximum of 25°C as a pilot. In collaboration with local authorities, this pilot project is designed to obtain information on the performance of such a system, groundwater quality effects and physical processes.
Next to that Koppert-cress has plans for a geothermal well doublet together with neighboring greenhouses, so they are currently exploring the possibilities for an additional HT-ATES at 80°C.
During the visit we will have a tour through the greenhouse, plant room and well field (8 wells) and presentations will be given about the intermediate results of the pilot project and the projections of feasibility study of a cascading system of a geothermal doublet with 2 HT-ATES systems at 80°C and 45°C.

Aardwarmte Vogelaer

Aardwarmte Vogelaer is a consortium of seven Dutch greenhouse operators in the Westland region. In a depth of 2,400 meters, a thermal water aquifer in sandstone with temperatures up to 90 °C was tapped and is now utilized with injection and production wells. Because of the extremely high amounts of sodium chloride in the thermal water, large parts of the above-ground facilities were conceived and constructed completely using glass fiber reinforced epoxy.

On top of that, measurement technologies recommended by the Dutch geothermics association TNO were taken into account. Small metal sheets or “coupons” and electronic measurement equipment are used to continuously measure corrosion levels in the thermal water for various types of metals. Furthermore, the plant features an inhibitor dosing system in order to prevent corrosion.

On-site parameters led to the recommendation of robust single-pass plate heat exchangers instead of conventional multi-pass heat exchangers in both titanium and stainless steel. Additionally, because of the high natural gas concentration in the thermal water at Poeldijk, a gas separator was installed featuring a gas-fired boiler generating 2,5 MWth. The heat generated by the gas is also fed into the district heating network.

The heating plant has been in operation since March 2017. All expectations placed on the all-GFRP plant have been completely fulfilled, both in operation and maintenance. Currently 17 greenhouses are connected to the system. Since the start of operation, none of the GFRP plant components (especially piping and instrumentation) has shown any signs of wear or corrosion. Besides, the heat exchanger concept with its modular single-pass system in particular provides significant cost savings. The modular heat exchanger configuration made it possible to repair a heat exchanger section and replace it without shutting down the entire plant.

Further, the combination of the thermal water system with a degasser is also performing well beyond expectations. In the meantime the very low injection pressure (7 bars at 300 m3/h) shows that it is possible to deactivate the installed reinjection pumps for 90% of the year. This reduces the plant’s own energy consumption and cuts costs.

Now, Aardwarmte Vogelaer saves approximately 13.5 million cubic meters of natural gas annually. This means a reduction in carbon dioxide generation of approximately 24,000 tons per year (corresponding to the output of about 9,000 households).  

Schedule of the excursion

9:00 | Departure from World Forum

10.00 | Arrival at Koppert-cress and visit

13.00 | Arrival at Vogelaer and visit

16.00 | Arrival at World Forum