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

Sensors

Sensors

Sensors

Sensors

Sensors

Sensors

Sensors

DAQ FTP

DAQ FTP

DAQ FTP

DAQ FTP

DAQ FTP

DAQ FTP

DAQ FTP

DAQ FTP

FTPServer

Single Data Aquisition

- Flow

- Temperature

- Electrical Power

- Thermal Power

- Solar Radiation

DAQData ManagementSystem

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

OverviewThe NI 9871 C Series serial module adds four

RS485/RS422 serial ports. - Maximum baud rates 3.6864 Mbps;- Maximum cable length 1.2 km.

Electric Power (Carlo Gavazzi); Thermal Power (Brunata).

NI 9219 - 24-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 0.003 ºC

Indoor JUMO PT100; Outdoor JUMO PT100.

Mandatory Variables ICategory Variable Unit Description

External      

  Ambient temperature ºC External ambient temperature

Indoor      

  Troom ºC Representative indoor temperature

Heat Pump      

  Compressor Power kW Compressor power consumption

  Cumulative compressor electricity consumption

kWh  

Building Circuit      

  TIN CI ºC Inlet water temperature at the internal circuit

  TOUT CI ºC Outlet water temperature at the internal circuit

  Flow rate kg.h-1 Water flow rate in the internal circuit

  Cumulative water volume    

  Operating hours h  

  Thermal heating/cooling to the building

kW  

  Cumulative heating supply to the building

kWh  

  Cumulative cooling supply to the building

kWh  

Mandatory Variables IICategory Variable Unit Description

Building Circuit      

  Total power of all the fan coils (VSDs?) kW  

  Cumulative electricity in all the fan coils

kWh  

  Total internal Pump Power (VSDs?) kW Internal circulation pumps    

  Cumulative electricity consumption in internal pumps

kWh  

Ground Circuit      

  TIN CE ºC Inlet water temperature at the external circuit

  TOUT CE ºC Outlet water temperature at the external circuit

  Flow rate kg.h-1 Water flow rate in the external circuit

  Operating hours h  

  Cumulative water volume    

  Thermal heating/cooling to the BHE kW  

  Cumulative heating supply to the BHE kWh  

  Cumulative cooling supply to the BHE kWh  

  External Pump Power (With VSDs) kW External circulation pump

  Cumulative electricity consumption in external pumps

kWh  

Other Variables I

Category Variable Unit Description

External      

  Solar Radiation W.m-2 External solar radiation

Indoor      

  Temperature of other indoor spaces ºC  

Heat Pump  Needs Communication    

  Pevap Bar Evaporator saturation pressure on the refrigerant circuit 

  Pcond Bar 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) ºC Refrigerant temperature at compressor outlet (discharge line)

Other Variables IICategory Variable Unit Description

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 72DMain 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 (m3.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

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;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;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;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;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;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;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;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;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;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)