42 research outputs found
Recommended from our members
Cooling our communities: A guidebook on tree planting and light-colored surfacing
This book is a practical guide that presents the current state of knowledge on potential environmental and economic benefits of strategic landscaping and altering surface colors in our communities. The guidebook, reviews the causes, magnitude, and impacts of increased urban warming, then focuses on actions by citizens and communities that can be undertaken to improve the quality of our homes and towns in cost-effective ways
Design and optimisation of organic Rankine cycles for waste heat recovery in marine applications using the principles of natural selection
Power cycles using alternative working fluids are currently receiving significant attention. Selection of working fluid among many candidates is a key topic and guidelines have been presented. A general problem is that the selection is based on numerous criteria, such as thermodynamic performance, boundary conditions, hazard levels and environmental concerns. A generally applicable methodology, based on the principles of natural selection, is presented and used to determine the optimum working fluid, boiler pressure and Rankine cycle process layout for scenarios related to marine engine heat recovery. Included in the solution domain are 109 fluids in sub and supercritical processes, and the process is adapted to the properties of the individual fluid. The efficiency losses caused by imposing process constraints are investigated to help propose a suitable process layout. Hydrocarbon dry type fluids in recuperated processes produced the highest efficiencies, while wet and isentropic fluids were superior in non-recuperated processes. The results suggested that at design point, the requirements of process simplicity, low operating pressure and low hazard resulted in cumulative reductions in cycle efficiency. Furthermore, the results indicated that non-flammable fluids were able to produce near optimum efficiency in recuperated high pressure processes
Risk-Based Selection of Monitoring Wells for Assessing Agricultural Chemical Contamination of Ground Water
A Cost Comparison of Organic versus Inorganic Ion Exchange Resin for Remediation of High-Level Waste
Ecological condition of coastal ocean waters along the U.S. western continental shelf, 2003 /
Ecological condition of coastal ocean waters along the U.S. western continental shelf, 2003 /
Initial riparian and wetland vegetation classification and characterization of the Columbia Basin in Washington /
Studies in environment.
"Grant no. 801473, program element no. 1HA098.""Project Officers: Samuel Ratick, John Gerba, Environmental Studies Division, Washington Environmental Research Center.""December 1973."Includes bibliographical references (pages 67-112).Mode of access: Internet