Researchers Analyze Role Of Shear In Turbine Passage

RICHLAND, Wash. - Although turbines have generated power at hydroelectric dams for more than 100 years, not much is known about how water flowing through the turbines may harm fish.

Researchers at the Department of Energy's Pacific Northwest National Laboratory are working to provide some answers. They have begun examining the relationship between water velocities within the turbine chamber and injuries to fish. Pacific Northwest researchers are studying one particular phenomenon called shear force, which occurs when two different water velocities collide. Depending on the shear's intensity, a fish may be disoriented momentarily, lose its scales, or be bruised or cut.

The most common effects on fish observed during this study have been tearing of the gill covers and loss of scales.

Findings from this study could provide hydroelectric dam operators with some of the information necessary to design fish-friendly turbines. Pacific Northwest's research is being done in cooperation with two other national laboratories - Idaho National Engineering and Environmental Laboratory and Oak Ridge National Laboratory - through DOE's Advanced Hydropower Turbine System Program.

To simulate the environment found within a turbine channel, Pacific Northwest researchers built a small-scale facility that uses an underwater jet nozzle to vary water velocity. Researchers have begun testing the impact to fish of velocities ranging from zero feet per second to 60 feet per second. They will identify the injury threshold - the points at which there are no, or few, injuries to fish.

"This is a fishery biologist's opportunity to provide specifications for use in turbine design," said Duane Neitzel, Pacific Northwest project manager. "Turbines are integral to the operation of hydroelectric dams, but they also can injure fish."

Turbine passage can be considered one of the more fatal routes that fish take through hyd

Contact: Staci West
DOE/Pacific Northwest National Laboratory

Page: 1 2

Related biology news :

1. Researchers determine genetic cause of Timothy syndrome
2. Researchers find color sensitive atomic switch in bacteria
3. Researchers identify protein promoting vascular tumor growth
4. Researchers devise potent new tools to curb ivory poaching
5. Researchers create nanotubes that change colors, form nanocarpet and kill bacteria
6. Researchers ID chlorophyll-regulating gene
7. Researchers develop fast track way to discover how cells are regulated
8. Researchers identify distinctive signature for metastatic prostate cancer
9. Researchers report new gene test for isolated cleft lip and palate
10. Researchers discover why mutant gene causes colon cancer
11. Researchers identify the genomes controlling elements

Post Your Comments:

(Date:7/22/2020)... BARBARA, Calif. (PRWEB) , ... July 21, 2020 ... ... firm driving digital transformation and innovation in technology and compliance, announces a new ... medical device companies must ensure every layer of their technology stack complies with ...
(Date:7/4/2020)... ... 03, 2020 , ... Aesthetics Biomedical (ABM), a leading aesthetics ... not only the products and treatments developed, but also the dedicated team behind ... the brands built by ABM have received several honors already for 2020, each ...
(Date:6/28/2020)... ... June 25, 2020 , ... ... software solutions for biopharmaceutical R&D, today announced that it has entered into ... full-length multispecific antibodies (Multiclonics®), to support their translational and clinical research strategy ...
Breaking Biology News(10 mins):
(Date:7/22/2020)... ... July 22, 2020 , ... Join experts from Reed Tech , ... Solutions, in a one hour live webinar on Thursday, August 13, 2020 ... for drugs and medical devices. Specifically, for medical devices, the NMPA has departments dealing ...
(Date:7/18/2020)... , ... July 17, 2020 , ... ... consulting firm for the life sciences and food industries, is pleased to announce ... of Clinical Research – Business Development. , Charles is an accomplished and results-driven ...
(Date:7/10/2020)... ... 2020 , ... Sentien Biotechnologies, Inc., a clinical-stage biotechnology company ... Nissenson, M.D., F.A.C.P., as its Chief Medical Officer. Dr. Nissenson will join ... Dr. Nissenson serves as an Emeritus Professor of Medicine at the David ...
(Date:7/1/2020)... (PRWEB) , ... June 29, 2020 , ... ... access to competitively procured purchasing contracts to its membership, recently named BioFit ... TIPS members with the opportunity to purchase ergonomic seating, cafeteria tables, book trucks ...
Breaking Biology Technology:
Cached News: