GROUND-MED PROJECT Data Acquisition Hardware and Software Anibal T. De Almeida Andre Quintino Duarte Coimbra, 25 February 2010

Global Data Acquisition Septemes les Vallons, France Oradea, Romania Coimbra, Portugal Benedikt, Slovenia Valencia, Spain Barcelona, Spain Padova, Italy Athens, Greece Sensors DAQFTP DAQFTP DAQFTP DAQFTP DAQFTP DAQFTP DAQFTP DAQFTP Server

Single Data Aquisition - Flow - Temperature - Electrical Power - Thermal Power - Solar Radiation DAQ Data Management System FTP File Sensors:

DAQ schematic

NI cRIO-9074 Processor: 400 MHz RT Internal Storage: 256MB DRAM: 128 MB Ethernet Port(s): 2 Operating Temperature: -20 to 55 C Number of Slots: 8 NI 9144 expansion chassis to expand I/O module selection beyond 8 slots

4-Port RS485 Serial Module Overview The NI 9871 C Series serial module adds four RS485/RS422 serial ports. -Maximum baud rates Mbps; -Maximum cable length 1.2 km.  Electric Power (Carlo Gavazzi);  Thermal Power (Brunata).

NI Bit Universal Analog Input 250 Vrms channel-to-channel isolation Built-in quarter, half, and full-bridge support Built-in voltage and current excitation Thermocouple, RTD, resistance, voltage, and current measurements CJC per channel for accurate thermocouple measurement 100 S/s/ch simultaneous inputs (50S/s/ch for Thermocouple)  LI-COR Pyranometer

NI 9217 – 4-Channel 24-Bit RTD Analog Input 250 Vrms channel-to-channel isolation Built-in current excitation RTD measurements High-resolution mode ºC  Indoor JUMO PT100;  Outdoor JUMO PT100.

Mandatory Variables I CategoryVariableUnitDescription External Ambient temperatureºCExternal ambient temperature Indoor TroomºCRepresentative indoor temperature Heat Pump Compressor PowerkWCompressor power consumption Cumulative compressor electricity consumption kWh Building Circuit TIN CIºCInlet water temperature at the internal circuit TOUT CIºCOutlet water temperature at the internal circuit Flow ratekg.h -1 Water flow rate in the internal circuit Cumulative water volume Operating hoursh Thermal heating/cooling to the building kW Cumulative heating supply to the building kWh Cumulative cooling supply to the building kWh

Mandatory Variables II CategoryVariableUnitDescription Building Circuit Total power of all the fan coils (VSDs?)kW Cumulative electricity in all the fan coils kWh Total internal Pump Power (VSDs?)kWInternal circulation pumps Cumulative electricity consumption in internal pumps kWh Ground Circuit TIN CEºCInlet water temperature at the external circuit TOUT CEºCOutlet water temperature at the external circuit Flow ratekg.h -1 Water flow rate in the external circuit Operating hoursh Cumulative water volume Thermal heating/cooling to the BHEkW Cumulative heating supply to the BHEkWh Cumulative cooling supply to the BHEkWh External Pump Power (With VSDs)kWExternal circulation pump Cumulative electricity consumption in external pumps kWh

Other Variables I CategoryVariableUnitDescription External Solar RadiationW.m -2 External solar radiation Indoor Temperature of other indoor spacesºC Heat Pump Needs Communication PevapBar Evaporator saturation pressure on the refrigerant circuit PcondBar Condenser saturation pressure on the refrigerant circuit Tout cond (liquid subcooling)ºC Refrigerant temperature at the outlet of the condenser (liquid line) Tout evap (evaporater super heat)ºC Refrigerant temperature at the outlet of the evaporator (superheat) Tout comp (discharge)ºCRefrigerant temperature at compressor outlet (discharge line)

Other Variables II CategoryVariableUnitDescription Building Circuit 10 minutes average water Temperature exiting Heat Pump ºC 10 minutes average water Temperature entering the Heat Pump ºC Power of individual fan coils W Power consumption of one fancoil (or all fancoils). Differential Pressure – Water Internal Circuit at the circulating pump Bar Absolute Pressure - Pump Discharge ??? Bar Ground Circuit 10 minutes average water Temperature exiting Heat Pump ºC 10 minutes average water Temperature entering the Heat Pump ºC Differential Pressure - External Circuit at the circulating pump Bar Absolute Pressure - Pump Discharge ??? Bar

Jumo RTD Indoor / outdoor temperature sensor (PT100) Ambient and Room Temperature Sensors - for temperatures from -30 to +80°C (200°C) - for use in HVAC - IP20 to IP65 protection - for 2-wire, 3-wire or 4-wire connections - fitted transmitter option 4 – 20mA or 0 – 10V

LI-COR - Solar Radiation Sensor Li-COR LI200SZ - silicon photovoltaic detector -Current output, which is directly proportional to solar radiation -Calibrated against an Eppley Precision Spectral Pyranometer (PSP) under natural daylight conditions in units of watts per square meter (W m-2) -Under most conditions of natural daylight, the error is < 5% (2). -Output - Typically 90 µA per 1000 W m-2 About 200 €

Carlo Gavazzi - Energy Meter Type EM21 72D Main Outputs: Currents (A); Voltages (V); Apparent power (VA); Active power (W); Reactive power (var). Communication through a RS485 communication port Compressor, Circulators, Fan Coils, HP Controls (?)

Brunata - Thermal Energy Meter Overview  Flow meter;  Two Liquid Temperature meters;  RS-485 Communication Max. Flow16.5 m/h (HGP 15); Max. Liquid Temperature 120 ºC (HGP 15). 3

Thermal Energy Consumption Brunata HGQ Energy Meters Tin_ci (C) Tout_ci (C) Q (m 3.s -1 ) Q (W) Q.t (Wh)

Brunata – Flow Sensor Technology Michael Faraday’s physical law about induction Water is the conductor This principle allows for measuring range better than 1000:1

Brunata – Components of a Heat Meter Flow sensor 2 temperature sensors Calculator with display

Brunata – Calculation of Heat Energy E – Energy consumed in a period of time; V – Water volume passing through the meter in same period; – Average temperature difference between flow and return in the system; k – Correction factor for heat enthalpy and the volume mass at the temperature measured.

Software

Output file The data acquired by all these devices will be processed every minute into a string buffer and after 10 minutes the last 10 buffered strings will be updated into a FTP file trough the Internet. To create this string, the application will also read the cRIO-9074 board date and time to complete all the required parameters.

Output file Data String (1 minute) 06/12/2010 0:01;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;no;yes;no; Data Buffer (10 minutes) 06/12/2010 0:01;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;no;yes;no; FTP (Old File) FTP (New File)