Thermal Power Monitoring

Transcript

Application Note Geo Thermal Power Station Monitoring Application Background Geothermal electric power stations are generally located where high temperature geothermal resources are available near the surface, often near areas where there are natural hot springs. These power stations are a good energy source, harnessing the energy from hot steam however there are many issues relating to noxious gasses also emitted from geo thermal springs and these need to carefully monitored to minimise the impact on the environment. Hot springs have noxious gases venting into the atmosphere as well as the steam, and the weather plays an important part as well. In addition to dissolved gases, hot water from geothermal sources may hold in solution trace amounts of toxic chemicals. These chemicals come out of solution as the water cools, and can cause environmental damage if released. Plant construction can adversely affect land stability and the surrounding land scan also be monitored for seismic activity to ensure there is no change to the seismic data as a result of the Geo Thermal power station installation. www.unidata.com.au unidata AN - ind - thermal power monitoring apr 13 Page 1 These instruments typically provide a 4-20mA analog output or a Modbus output which can be read by Neon Remote Terminal or Module routinely, perhaps every minute and then routinely send the data to the Neon Server every 15 minutes. The system could also be equipped with a ground seismic monitor to take daily readings of seismic activity so a clear pattern of the base level of activity can be determined, and then use that base level to see if there are any local area changes to that activity as a result of any different load levels / different operation patterns for the Geo Thermal Power Station. The Neon Remote Terminal scheme / program can also be set up to check parameters each minute and raise an alarm and an immediate transmission to the Neon Server in the event of any reading is outside it’s preset limits. The Neon Server can also be set up with alarm actions, to notify staff by email or text, with an escalation process, of any out of limits conditions. As well as the immediate actions to deal with for high / dangerous gas levels, data can be analyzed and long term trends can be determined to minimise environmental impacts and optimize production. Finally water quality measurements for any outflows can be important, so a water quality instrument on any outflows would allow outflows to be checked for quality, to maintain environmental compliance. These instruments can also be connected with a Neon Remote Terminal to the central Neon Server, either with a radio link, or buy connecting directly into the plant network using an Ethernet cable. Application Detail Firstly, there will be a requirement to monitor the weather in the area using Tier 2 weather station equipment to record the ambient conditions, especially wind speed and direction, so there is good knowledge of the general wind conditions to make sure emissions from the plant are not being carried by the wind to areas of population, such as a local town or city. There may be the need for one Tier 2 to be installed at the plant and at each perimeter fence of the facility to get a good reading for the local area. Unidata supplies various weather station instruments, either a multifunction ultrasonic weather transmitter, which is very convenient to install, as well as separate discrete weather instruments. For this application, the simpler ultrasonic weather transmitter would most likely be the best choice for the application. A Neon Remote Terminal can be connected to each weather station and be set up to read the instruments every minute, and store the raw and average readings every 5 minutes, and transmit the data to a central Neon Server every, say, 15 minutes As well as weather station equipment to measure weather conditions such as wind speed, direction, humidity, temperature, solar radiation etc, there would also be a requirement to add additional instruments to measure the presence of noxious gases and to also measure seismic activity There are many manufacturers of gas monitoring equipment. One such manufacturer is Draeger and there are sensors to measure noxious gases such as CO, CO2, NO, H2S, SO2 as well as O2 and N. www.unidata.com.au Page 2 unidata AN - ind - thermal power monitoring apr 13 unidata AN - ind - thermal power monitoring apr 13 Page 3 Typical Configuration Application Specific Instruments/Inputs Options Unidata Part Number Description Drager Gas Detection Instruments Dräger MiniWarn CO2 / CO Gas Monitor Water Electroconductivity Instrument 6536E Water EC Instrument with Batt, 512K CMOS memory Four Electrode water Conductivity Probe 6536P-2- 4EL Water Conductivity Probe - 10m, 20m, 30m or 50m Vaisala Weather Transmitter WXT520 measures barometric pressure, humidity, precipitation, temperature & wind speed & direction 6501-V Vaisala Weather Transmitter RS232/422/485 SDI-12 Temperature Thermistor Probes 6507A- Red Thermistor Probe 3K@25 with requested cable lengths Precision Thermistor Probe 6507D- Robust Therm. Probe 0.1C with requested cable lengths Linear Temperature Probe 6535A- Temperature Probe LM34 with requested cable lengths Humidity and Temperature Probe 6539B Humidity & Temp Probe (5-18V) Rain Gauge 6505C Rain Gauge / Tipping Bucket Mounting Arrangement for Temp Probes 6704B Radiation Gill Screen & Mount - Half Radiation sensors 7241A-L Li-cor Pyranometer Sensor-Solar Energy Options Unidata Part Number Description Cellular RTU GPRS 2011E-AB0 Neon Metering Module GSM+Ant+Batt Cellular RTU 3G 2013D-AB0 Neon Metering Module 3G+Ant+Batt Cellular RTU GPRS-Industrial 2014E-AB0 Neon Remote Terminal-Terrestrial+Ant+Batt Cellular RTU 3G-Industrial 2016D-AB0 Neon Remote Terminal-Terrestrial+Ant 3G+Bat Low Earth Orbit Satellite - Globalstar 2015D-AB0 Neon Remote Terminal-Satellite Globalstar+Ant+3 Bat Ethernet 2017E-0B0-1 or 3 NRT Ethernet - 1 or 3 Ethernet Ports with Batteries Equatorial Orbit Satellite - Inmarsat 2018E-AB0-1 NRT Ethernet with Inmarsat M2M Modem & 1 Ethernet Port & Bat WI-FI 2019E-AB0-1 NRT Ethernet Wi-Fi - 1 Ethernet Port & Batteries LCD Display 2500E NRT LCD Display Field Termination Strip 2103E 2014E, 2015D, 2016D & 2017E NRT FTS NRT Firmware Option 2303A-8M 8M Extended Memory NRT Firmware Option 2303A-8M-CAM 8M Extended Memory & Camera Option NRT Firmware Option 2303A-CAM Camera Option Options Unidata Part Number Description Neon Applications Software 2302A Neon Server Software Licence Incl 5 NAL Neon Applications Software 2302A-10 Additional 10 NRT Access Licence Neon Applications Software 2302A-20 Additional 20 NRT Access Licence Neon Applications Software 2302A-50 Additional 50 NRT Access Licence Options Unidata Part Number Description Neon Hosting Service 2301A Neon Data Initial Subscription Setup Fee Neon Hosting Service 2301A-01 Neon Data Service Fee for 1-50 NRT Neon Hosting Service 2301A-02 Neon Data Service Fee for 51-100 NRT Neon Hosting Service 2301A-10 Neon Data Service Fee Metering Options Unidata Part Number Description Standard Starlogger 6004D-11 Red logger 512K + Alkaline Battery Display Starlogger 6004D-21 Blue logger with LCD 512K + Alkaline Battery Prologger 7001E-11 Green logger 1M + Alkaline Battery Micrologger 8010B-EUR Micrologger 512K Field Termination Strip Starlogger 6103E 6004D FTS Field Termination Strip Prologger 7100E 7001E FTS Options Unidata Part Number Description Starlog V4 Management Software 6308A-AUE STARLOG V4 Full Licence Key Neon Telemetry - NRT / RTU / Field Units Neon Application Software - Customer Server Neon Hosting Service - Unidata Server Conventional Dataloggers / Field units DNV Certification Pty Ltd Starlog Datalogger Management Software QUALITY ASSURED ISO9001:2008 Available from: Unidata Pty Ltd 40 Ladner Street, O’Connor, 6163, Western Australia Tel: +61 8 9331 8600 [email protected] www.unidata.com.au Unidata Pty Ltd (Unidata) owns the copyright in this information and much of the information in it is Unidata’s proprietary information. No person may reproduce or otherwise deal with this information (or any part of it) or any of the proprietary information (or any part of it) for commercial purposes except with Unidata’s prior written consent. unidata AN - ind - thermal power monitoring apr 13