Regulatory DO Levels - Belleville HydroelectricProject Overview
Located on the east bank of the Ohio River in Belleville, West Virginia at the Corps of Engineers' Belleville Locks and Dam, Belleville Hydroelectric is a municipality owned, non-profit power plant.
Hydroelectricity is power generated from moving water, and it is a clean and renewable source of energy. Hydroelectric plants such as Belleville generate energy without emitting any standard atmospheric pollutants or contributing to global warming. Hydropower is the primary contributor of renewable energy in the United States and can be produced as long as rain falls and rivers flow. Hydropower projects also provide water management, flood control and recreational benefits.
While the benefits of hydroelectric plants certainly outweigh the costs, the construction of these plants can be disruptive to surrounding aquatic ecosystems. Dissolved oxygen content of the water may change from pre-construction conditions. Water exiting from turbines is typically much colder than the pre-dam water, which can change aquatic faunal populations.
The Federal Energy Regulatory Commission, or FERC, is an independent agency that licenses and inspects private, municipal, and state hydroelectric projects. NexSens Technology was selected to install and maintain real-time DO monitoring systems so plant employees can monitor levels of dissolved oxygen upstream and downstream of the plant, helping to meet FERC regulations.
System Description
While the DO monitoring systems have been maintained by NexSens Technology since 1999, engineers installed a real-time radio telemetry system in June 2004. Servicing of the DO monitoring system is generally performed on a scheduled monthly to bi-monthly basis. More frequent visits are required in the summer months due to algae and mussel growth on the dissolved oxygen sensor. When sensor maintenance is required, the cartridge-based sensor is designed to be rebuilt in the field.
The NexSens N510 dissolved oxygen sensor is used to provide cost effective, reliable oxygen measurement at the dam. The galvanic dissolved oxygen sensor uses a rugged 5 mil Teflon membrane to resist mechanical abrasions and tears. The membrane serves as a barrier to allow molecular oxygen to diffuse into the reaction cell where it is reduced at the working electrode. This reaction produces a small current which is proportional to oxygen concentration.
The dissolved oxygen data is collected and sent via radio telemetry to a nearby PC, where it is stored in an iChart software database. iChart software allows Belleville Hydroelectric employees to quickly generate data analysis reports that are used to monitor the difference in temperature and oxygen levels before and after the dam for regulatory compliance. An annual report is submitted to the US Army Corps of Engineers.
By installing the real-time radio telemetry system and streaming data to the NexSens WQData web datacenter from the dam site, NexSens engineers can monitor the DO readings for changes or drift that may have been caused by unnatural means such as a torn membrane or clogged deployment pipe. Additional trips are scheduled as needed to minimize system downtime. | NexSens 1001 | iChart software | NexSens WQData-6 | Annual data hosting package for up to 6 field sites, additional site expansion available | NexSens 4100-BASE | Spread spectrum radio base station | NexSens A44 | High gain antenna, radio frequency, 3 dB | NexSens A36 | RF cable, micro-loss, 6' | NexSens 4100-iSIC | iSIC data logger with spread spectrum radio telemetry | NexSens A55 | Pole/wall mounting kit | NexSens A38-P | Ground kit, pipe attachment | NexSens A22 | Solar power kit, 20-watt | NexSens A44 | High gain antenna, radio frequency, 3 dB | NexSens A36 | RF cable, micro-loss, 6' | NexSens N510-100 | Dissolved oxygen & temperature sensor, 100 ft. cable |
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