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Full-scale prototype testing of the WASP - A novel wave measuring buoy.

Abstract

To  assess  the  viability  of  locations  for  wave energy  farms,  and  design  effective  coastal  protection measures,  knowledge  of  local  wave  regimes  is  required. Current  regime-measuring  devices  are  expensive,  and  the aim  of  the  WASP  Project  is  to  develop  a  low-cost,  selfpowering  wave-measuring  device.  The  Wave-Activated Sensor Power Buoy (WASP) comprises a floating body  with a  moonpool.  The  relative  motion  of  the  water  level  in  the moonpool  to  the  buoy  will  pressurise  and  depressurise  the air  above  the  water  column.    It  has  previously  been demonstrated through the  tank  testing  of  scale-models that the  incident  wave  spectrum  may  be  estimated  from measurements of the pressure within the air above the water column  [1].  A  full  scale  prototype  of  the  WASP  was assembled  and  deployed  in  February  2019.  The  purpose  of the  prototype was to  determine if a relationship between the incident  wave  spectrum  and  the  pressure  spectrum  within an  oscillating water column  (OWC)  chamber with a  view to estimating  sea-states  at  full-scale.  This  paper  will  discuss the  behaviour of the prototype WASP during the time it was deployed and operational. The  paper  will review and assess the  overall  performance  of  the  device,  including  physical integrity of  the  WASP as  a whole and the various individual components,  power  usage,  data  management  and  examine issues  encountered  during  deployment.  The  process  shall be  presented  along  with  data  and  initial  results.