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GROUND-MED PROJECT COIMBRA DEMO-SITE André Quintino Duarte Coimbra, 23 February 2012 PowerPoint Presentation
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GROUND-MED PROJECT COIMBRA DEMO-SITE André Quintino Duarte Coimbra, 23 February 2012. Demonstration Building. “Fábrica dos Mirandas”.

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Presentation Transcript
slide1
GROUND-MED PROJECT

COIMBRA DEMO-SITE

André Quintino Duarte

Coimbra, 23 February 2012

demonstration building
Demonstration Building

“Fábrica dos Mirandas”

Total area: 3250m2FourfloorsTwopublicservicesinstalledOffices, laboratories, conferenceroomCapacity for 250 permanentworkers + 72 temporarypeoplein a conferenceroomLocatedclose to a river

demonstration building2
Demonstration Building

The heated /cooled spaces are located in level 3 of the building (last floor).

22 rooms (offices)

Approximately space conditioned area 600 m2

simplified schematics of the hydraulic installation
Simplified schematics of the hydraulic installation

75 mm Diameter PPR Pipes

in the main sections

borehole heat exchanger
Borehole Heat Exchanger
  • Seven vertical boreholes
  • 125 m deep
  • 5x5 m rectangular grid
  • grout material is graded sand (pea size - 3-8 mm )
geological profile
Geological Profile

Earthworks

Alluvium

Limestone / Sand / Silt

Clay Loam

High Groundwater flow

Freatic Groundwater level – 5 metres

heat pump
Heat Pump

Reversibility is done on the water side in order to always be in counter current on the heat exchangers.

This is achieved by 3-way motorized valves

heat pump test results
Heat Pump Test Results

The performance of the heat pump prototype was tested at the CIAT Culoz research center.

Heating Capacity – 70.4 kW

Cooling Capacity – 63.5 kW

circulation pumps
Circulation Pumps

High efficiency permanent magnet motor pump supplied by Grundfos, with variable speed control.

fancoil units
FanCoil Units

The Fan Coil units were supplied by CIAT. They are COADIS 2 fancoil units models 235/22 and 235/33. A total of 33 units were installed – 23 units of model 235/22 and 10 units of model 235/33.

These fancoil units are equipped with high efficiency impellers and high efficiency permanent magnet motors.

fancoil units3
FanCoil Units

Each fan coil can be individually regulated by means of a thermostat. Comfort temperature can be selected by the user by means of a wall mounted control and fan speed is controlled automatically by means of a 0-10V control signal.

The fancoils had to be retrofited with an electronic fan speed limiter, because of the noise generated was unacceptable by the users.

thermal storage
Thermal Storage

The thermal storage tank is to be located in a room adjacent to the machinery room. It is planned to have a volume of 3.5m3 (40% water + 60% PCM).

Research is being conducted with the support of the Fluids Thermal Transfer Group of the Department of Mechanical Engineering on the best design of the tank to ensure optimal heat transfer and to ensure that the storage maximum capacity of the PCM modules is used.

It was found that the most suitable material would be the S46 salt hydrate from PCM products Ltd (UK)