Water cooled high efficiency chillers. And water cooled chillers to achieve higher SEER (in Port bassins for example, at rather low depths)

Reference: B.3.2

LEME Mitigation

Reduce electricity consumption of chillers and pumps by replacing existing air cooled or water cooled chillers by more efficient systems in termes of EER)

Large public and private air conditionned office buildings, hotels, hospitals and small scale industries

Eurovent class A SEER from 5,1 to 8 (water cooling) . Hydrocarbon HFC refrigerants only.


Estimated pay back time short term : 2-4 years, medium term: 4-6 years, long term : 6-8 years (*)

Medium term. Sea water cooling can be implemented at low depths (harbor bassins)

Reducing electricity consumption by improving performance of chilled water system including chillers, cooling towers, pumps, energy storage . Energy savings can be obtained by replacing chillers with à higher ESEER (higher Eurovent classification), higher efficiency cooling towers (evaporative or semi-evaporative, fans with VSD), revamping pumps with a more efficient motor IE3 or IE2 vs IE1, and adding variable speed drive (VSD) ; in addition off these energy efficient implementations, enregy savings is generally up to 20 % than performances of an usual chilled water system. Free energy produced by solar panels for generating heat to absorption cooling equipments have been proved having very low SEER on several projects (SEER below 2). Investors should be aware of these poor results before adopting this cooling technology (design simulation need to be done to check the expected performance).