NDLI: Performance Modelling of an Offshore Floating Wind Turbine-Driven Deep Sea Water Extraction System for Combined Power and Thermal Energy Production: A Case Study in a Central Mediterranean Context

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Sant, Tonio Robert, N. Farrugia
Copyright Year	2013
Abstract	Current research is exploring a new design concept for offshore wind turbines whereby the electrical generator in a conventional wind turbine is replaced by a large positive displacement pump that supplies pressurized sea water to a centralized hydro-electric plant. This paper investigates the potential of applying this concept to concurrently exploit thermocline thermal energy through deep sea water extraction in conjunction with offshore wind energy. A performance analysis is presented for a single wind turbine-driven pump supplying combined power and thermal energy by delivering pressurised deep sea water to a land-based plant consisting of a hydro-electric generator coupled to a heat exchanger. The steady-state power-wind speed characteristics are derived from a numerical thermo-fluid model. The latter integrates the hydraulic characteristics of the wind turbine-pump combination and a numerical code to simulate the heat gained/lost by deep sea water as it flows through a pipeline to shore. The model was applied to a hypothetical megawatt-scale wind turbine installed in a deep offshore site in the vicinity of the Central Mediterranean island of Malta. One year of wind speed and ambient measurements were used in conjunction with marine thermocline data to estimate the time series electricity and thermal energy yields. The total energy yield from the system was found to be significantly higher than that from a conventional offshore wind turbine generator that only produces electricity. It could also be shown that in regions where the offshore wind resource is not as rich, but where the ambient temperature is high as a result of a hotter climate, the cooling energy component that can be delivered is relatively high even at periods of low wind speeds.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
File Format	PDF
ISBN	9780791855423
DOI	10.1115/OMAE2013-10714
Volume Number	Volume 8: Ocean Renewable Energy
Conference Proceedings	ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2013-06-09
Publisher Place	Nantes, France
Access Restriction	Subscribed
Subject Keyword	Wind Climate Temperature Cooling Pipelines Time series Wind velocity Generators Heat exchangers Modeling Flow (dynamics) Steady state Thermal energy Vacuum pumps Design Heat Wind energy Pumps Offshore wind turbines Ocean engineering Wind turbines Thermofluids Turbines Seawater
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in