Ground source heat pump systems
Groenholland designs & builds highly efficient turn key ground source heatpump systems based on vertical closed loop borehole heatexchangers. Using renewable energy from the earth and stored energy from the buildings heating and cooling cycles, you can make the most of your site's geo-energy storage potential.
Energy savings & long term reliability
Since 1996, Groenholland, has demonstrated that it can provide elegant and energy efficient concepts. Our design integrates building energy requirements, plant component selection and the borehole wellfield potential. Heatpump technology using vertical closed loop borehole heatexchangers, is by far the most reliable and maintenance free way of using the earth thermal storage capability long term. A well designed and installed system should last the lifetime of the building.
Cost savings
Cost savings are related to savings on primary energy, low maintenance cost and low life cycle costs. All these aspects are provided by a groundsource installation. Allthough energy savings are project specific, a standard heating and cooling operated heatpump installation should achieve savings over a conventional gasboiler/chiller installation of between 30-50%, even if National electricity generating and transport losses are taken into account.
"The right design, the right materials & the right implementation"
is the Groenholland philosophy that warrants a very high efficiency (COP/SPF) and a life span of more then 50 years. Low "life cycle" costings, make groundsource by far the most sustainable technology in mid- and longterm usage and will provide you and the environment with the essential "pay back". The client should realize that incomplete and flawed design or selection based on lowest first cost often carry costly lifelong energy consumption penalties through inefficient plant operation and intensive maintenance.
Turn key approach
The approach that integrates and warrants all aspects of the design and construction cycle: site testing, feasibility of ground source energy systems, integrated thermal and hydraulic design of heat pump installations and controls to suit the building energy requirements and to maximize energy savings within the available budget.
We invite you to discuss your energy requirements with us and fully evaluate and integrate the capabilities of the groundsource heatpump technology into your project.
Groenholland geo-energy products
Geo energy consultancy and high efficiency, turnkey geothermal installations are our key products.
High quality products to extract the maximum efficiency from an installation with little or no maintenance. Off site fabrication of our geothermal products allows high built quality and little loss of time when installing systems on site.
Design & engineering of installations as well as the selection of components and their performance are coordinated with the client.
All products are warranted, monitoring off system key parameters (temperatures, flows) and energy metering when the installation is in use underwrites this.
Groenholland geo-energy projects
Projects cover a wide range of building types. They vary from family homes and apartments, to schools, galleries, hospitals and universities as well as commercial developments such as offices and warehousing.
What the projects have in common is the desire to use energy saving sustainable technology and to design with this in mind.
Using geo-energy to its full potential, whilst keeping the projects elegant and economically justifiable.
Targets on reducing the use of fossil fuels (gas, oil and electricity) are often the focus point. Therefore it is essential at an early stage to quantify the ability of a groundsource installation to achieve the set energy targets within restraints such as the building's heating and cooling temperatures, annual energy loads and project budget.
"turn key" implecates design, engineering and implementation in one hand, providing technical as well as a thermal warranties on the performance and efficiency of the end product.
EGEC European Geothermal Energy Council
The common vision (2020-2030-2050) for the renewable heating & cooling sector in Europe recognizes the potential of geothermal.
Topics from the Strategical Research Agenda will provide valuable input into future EU research programs.
For information on the future potential of shallow geothermal heatpump systems for Europe you can contact Guus van Gelder at Groenholland. Or visit www.egec.org
REHVA Journal article
Groenholland's Bristol's Lakeshore 286 apartment project exposed as a case study. See the REHVA European HVAC Journal, volume 48 of August 2011, or visit the website at www.rehva.eu
Thermal interference in the underground
Groenholland have developed a methodology for calculating temperature interference between adjacent closed loop borehole heat exchanger (BHE) projects.
The ability to quantify thermal effects between systems will in the near future become an essential element in the design of areas housing multiple BHE's. As the number of implemented BHE based systems is steadily growing, it has become apparant that spatial planning and optimisation of underground energy systems requires appropriate tools.
The project was carried out for the Dutch ministery of Infrastructure & Environment.
Groenholland Plantroom
Geothex probes
The Geothex company of Houten the Netherlands have developed a novel spiral concentric PE100 probe type heat exchanger, specifically for shallow applications. Groenholland is involved in the extensive laboratory and field tests of the new product.
We will keep you informed.
visit www.geothex.nl
Current 2012 projects
The new Humanities building of Queen Mary University at Mile End Road in London was completed in the spring of 2011 and is now nearing its first year of operation.
The Michael Faraday School in Walworth, London was finished in 2011 and the schools heatpump installation has seen operation this winter. In the school's lobby there is an educational panel giving live information as well as monitoring the system's performance.
The Holland Park School project in West London (Shepherd) project is moving ahead. The plantroom equipment was brought to site in August 2011.
The geothermal capacity of the hybrid installation (gas boilers and dry cooler are integrated into the design) is around 350 kW of both heating and cooling. Total output capacity is around 700 kW.
The Holland Park School project is to be completed by 2012.
In September 2011 Groenholland installed the Borehole Heat Exchanger at the St. James Gateway project in Central London (Piccadilly). In November 2011 the BHE wellfield was completed and tested. In January 2012, one of the double loop heatexchangers is being tested with a Geothermal Response Test. The Groenholland equipment, consisting of the test rig and a 15 kVa silent generator were hoisted into the building site's 10 meter deep excavation.
In Bristol, Lakeshore a 150 apartment project on the refurbished former Imperial Tobacco office site is up and running using 350 kW of geothermal heatpumps. Solar panels that will be used to regenerate the borehole heat exchanger wellfield and thereby enhance energy savings, will be installed later this year.
Groenholland UK is on site at Adelaide Road School's in Swiss Cottage. This BAM project will use a simultaneous heating and cooling geothermal installation, integrated with dry coolers and gas boilers.
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Micro Generation Scheme
Groenholland UK are certified as a groundsource heatpump installer under the Microgeneration Certification Scheme (MCS 1201).