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Sea Water Air Conditioning (SWAC) for Indian Ocean Island Coasts
22 June 2015
Conference on Island Energy Transitions: Pathways for Accelerated Uptake of Renewables
22-24 June 2015, IRENA- Martinique
Total Population: 1.3 million
Land surface area: 2,040 km2Mauritius
Mauritius Location
Administrative & Business Centre
Port-Louis: A hot, crowded capital!
Summer: 39o C
Conventional Air conditioning
Chiller
• Refrigerant• Compression• Expansion
• Medium /Big Facilites• Chiller cools water• Water cools Air
SWAC Concept
Open Loop
of sea water
1Closed Loop
of fresh
water
2Customer
Closed Loop
3
SWAC Concept
3 water loops to extract available thermal
energy from the ocean to the city !
Total buildings studied
Buildings selected for DOWA
65 buildings studied
Potential = 61 MW cold
DOWA targets = 44 MW Cold
Up to 26MW
electricity power
available
41,700 T CO2
savedper year
MUR 175 M
saved yearly on fossil
imports
Tomorrow DOWA, will be able to produce 44MW cold requiring only 4 MW electricity
Today, 51 key buildings in Port Louis require 30MW of Fossil fuel power to produce 44 MW
cold for air conditioning
Grant: Marine Studies
Customer base
Connection to existing systems
Retrofitting Chilled Water Network
Multiple Off-takers but Government buildings can participate
Onshore construction
Heat Gains
Works in built-up area
Offshore construction
Sea water return
Biofouling
Legal framework
SWAC Challenges
P.Louis
SWAC
(DOWA)
Aqua-culture
Bottling
Health & care
Desalination
SWACs can release various downstream opportunities
PLouis SWAC (DOWA) Timeline
Independent
from
concession
Construction
Go Concession from PMO
End June 2015 ?
Go ProjectJune` 2016
Go LiveSep 2017
2013 2014 2015 2016 2017
AIP from MEPU
10 july 2014
Dependent
on
concession Detailed studies
Preproject
Construction
Today
22 June 2015
Application to BOI
1st March 2013
Incorporation of SPV
PLouis SWAC (DOWA) Timeline
Independent
from
concession
Construction
Go Concession from PMO
End June 2015 ?
Go ProjectJune` 2016
Go LiveSep 2017
2013 2014 2015 2016 2017
Dependent
on
concession Detailed studies
Preproject
Construction
Today
22 June 2015
Incorporation of SPV
Port-Louis SWAC (DOWA) will be an energy conservation project and will contribute to…
Mauritius strategy to
reduce energy dependency
develop the Ocean as a
new economic pillar for Mauritius
confirm SWAC as a model
replicable in the Indian Ocean
Additional
Information!Jean-Marie Puran, Business Development
Sotravic Ltée
Grant: Marine Studies
SWACs
high capital costs.
Low running costs.
Capital Costs reduce with:
Short pipe run to deep sea
Gentle currents
Concentrated clients
Good project management
SWACs perform exceptionally well for long utilization hours (hotels, hospitals, malls, 24/7 offices)
SWAC vs Conventional Systems
Capital
Costs
Running
costs
SWAC
ConventionalCooling
Maritime Zones Act
Four main steps
Application
Recommendations from the Board of Investment (BOI)
Authorization in Principle from
responsible Ministry
Concession from the Prime
Minister
![Sea Water Air Conditioning [SWAC]: A Cost Effective Alternative](https://img.pdfslide.net/doc/110x75/5883e2841a28ab62358b6a01/sea-water-air-conditioning-swac-a-cost-effective-alternative.jpg)
