Technical and Economic Assessment of Solar Photovoltaic for Groundwater Extraction on the Hanford Site

Mackley, Rob D.¹  Anderson, David M.¹  Thomle, Jonathan N.¹  Strickland, Christopher E.¹ 

[1]Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

关键词: solar;    photovoltaic;    groundwater;    pump and treat;    Hanford;   

DOI  :  10.2172/1326162
RP-ID  :  PNNL--24741
PID  :  OSTI ID: 1326162
Others  :  Other: 830403000

美国|英语

来源: SciTech Connect

【 摘 要 】

The overall goal of environmental remediation is to protect human health and the environment. Implementing renewable energy sources such as solar photovoltaic (PV) in groundwater extraction and pump-and-treat (P&T) systems may help minimize the environmental footprint of remediation efforts. The first step in considering solar PV for powering Hanford groundwater extraction is assessing the technical and economic feasibility and identifying potential target locations where implementation would be most successful. Accordingly, a techno-economic assessment of solar PV for Hanford groundwater extraction was completed in FY15. Multiple solar PV alternatives ranging in size from 1.2 to 22.4 kWp DC were evaluated and compared against traditional grid-powered systems. Results indicate that the degree to which solar PV alternatives are feasible is primarily a function of the distance of avoided power cable costs and the inclusion of an energy storage component. Standalone solar PV systems provide an energy source at the well and avoid the costs and logistics associated with running long lengths of expensive power cable to the well-head. When solar PV systems include a battery storage component, groundwater can be pumped continuously day and night in a year-round schedule. However, due to the high cost premium of the energy storage component, a fully solar-powered solution could not provide an economic direct replacement for line-powered pumping systems. As a result, the most ideal target locations for successful implementation of solar PV on the Hanford Site are remote or distant extraction wells where the primary remedial objective is contaminant mass removal (as opposed to hydraulic containment) and three-season (March through October) intermittent pumping is acceptable (e.g. remediation of hexavalent chromium in 200-UP-1).