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SUMMARY:On the bright side: new developments in Marine Cloud Brightening t
 echnology - Edmund Reardon\, PhD student\, Dept of Engineering and Yashavi
  Raj\, PhD student\, Dept of Engineering
DTSTART:20241016T120000Z
DTEND:20241016T130000Z
UID:TALK221221@talks.cam.ac.uk
CONTACT:123754
DESCRIPTION:Marine cloud brightening (MCB) is a solar radiation management
  technique that aims to enhance the albedo and light-scattering properties
  of marine clouds using seawater. By atomising seawater into highly monodi
 sperse submicron diameter droplets\, nanocrystalline salt particles are ca
 rried into clouds inducing a ‘brightening’ effect. This could create a
  local cooling effect and be implemented as a potential intervention for p
 rotecting vulnerable systems ranging from the Arctic to the Great Barrier 
 Reef.\n \nHowever\, this technique faces significant technical challenges\
 , including the requirement of a narrow droplet size distribution\, high p
 roduction rate\, efficiency and a resilience to environmental conditions. 
 To address these challenges\, our PhD research draws inspiration from the 
 natural process of sea spray generation by waves on the surface of the oce
 an. Waves\, as they break on the surface of the ocean\, entrain air and fo
 rm bubbles with thin liquid films that burst into thousands of submicron d
 roplets. This process can be emulated through a method known as bubble-bur
 sting atomisation or bubblisation\, using only jets of low-pressure air to
  simultaneously form and burst bubbles of seawater at the gas-liquid inter
 face to generate a fine spray of submicron droplets.\n \nIn this talk\, Ya
 shasvi will present his current progress towards the design\, parametrisat
 ion\, and experimental validation of various bubblisation geometries\, as 
 well as the future plans for investigating this method further. The insigh
 ts gained from this research aim to critically evaluate the viability of b
 ubblisation as a suitable technique for generating droplets for marine clo
 ud brightening.\n \nIt is becoming evident that regional cooling technique
 s such as Marine Cloud Brightening will be called upon in the coming decad
 es. After finding only three small groups in the world working on the engi
 neering challenge\,  therefore we have set out to develop a spray system f
 or Marine Cloud Brightening. The aim was to develop a sprayer that produce
 s submicron droplets in vast quantities that fall into a controllable\, na
 rrow size range. Settling on superheated atomisation as a good potential c
 andidate\, we set up a sprayer and particle detection system in a new seaw
 ater lab. There are now three of us researching different sprayers in the 
 Seawater lab\, operating with an advanced particle detection system which 
 is providing encouraging results. \n \nIn this talk\, Edmund will be prese
 nting his results from the superheated atomiser along with the technical c
 hallenges faced in measuring plumes of sprayed submicron sea water droplet
 s.\n \nSeminar Details:\nTime: 1pm - 2pm\nLocation: James Dyson Seminar Ro
 om\nAddress: Department of Engineering\, Trumpington Street\, Cambridge\, 
 CB2 1PZ\n\nLater seminars will be 23rd Oct\, 06th Nov\, 27th Nov.
LOCATION: Cambridge University Engineering Department\, James Dyson Semina
 r Room
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