As part of the three-country District Cooling System (DCS) Learning Missions, Cofely UK Limited invited the Department of Environment and Natural Resources (DENR) to the Kings Yard Energy Center on December 1 – 6, 2015 to examine DCS technologies and applications that they employ and to assess its suitability in the Philippines.

The DCS Learning Mission included presentation of objectives of the Mission, the overview of the Philippine Chillers Energy Efficiency Project (PCEEP) implementation, as well as the proposed DCS project of the DENR to Cofely UK Limited. This was followed by a field visit to the Kings Yard Energy Center, also popularly known simply as Energy Center, which supplies the heating and cooling requirement of the Queen Elizabeth Olympic Park – a home to the 2012 London Summer Olympic Games.

pceep dcs heavy duty pipeSample of the insulated heavy duty pipe used in the 16-kilometer DCS piping networkThe Energy Center uses a district energy network infrastructure to help deliver environmentally sustainable and low carbon regeneration and development. Utilizing biomass boilers, the Energy Center uses woodchips as primary fuel to generate electricity, heat, and chilled water from the Combined Cooling, Heat and Power (CCHP) units. This tri-generation process is 30% more efficient than traditional generation methods.

With an overall efficiency of approximately 80%, the system produces electricity and absorbs heat for district cooling and heating. Chilled water is generated by absorption chillers using extremely high temperature produced from the exhaust of a CHP unit. Peak cooling demands are met with supplemental chilled water from traditional chillers, which in this case are ammonia chillers. Safety issues abound in the use of ammonia chillers, so to prevent accidents the facility is equipped with sophisticated monitoring device that detects and traces the amount of leaks.

DENR delegates recommend the application of district cooling aspect of the Energy Center (i.e., use of electrically-powered chillers) for the purpose of space cooling, but argue that while tri-generation cooling offers great potential to industries in the Philippines, it may not be viable for the DENR DCS project as this would entail substantial investment for the establishment of a power plant and securing logistics for fuel sources to generate electricity. DENR DCS Project may consider ammonia (NH3 )-based chillers in the DCS project, owing to its efficient cooling properties and non-ODS and non-GWP properties. ODS and GWP stand for Ozone Depleting Substances and Global Warming Potential respectively. They highly agreed, however, that safety measures should be considered to counter safety issues and risks associated with the use of NH3-based chillers.

DENR Undersecretary Atty. Analiza Rebuelta-Teh headed the party, along with Assistant Secretary Corazon Davis, Ms. Consolacion Crisostomo of Environmental Management Bureau (EMB), Ms. Marilou Calado of DENR-Foreign-Assisted and Special Projects Service (FASPS) and Mr. Jo-Rex Camba of the Philippine Chillers Energy Efficiency Project-Project Management Unit (PCEEP-PMU). Other DCS Learning Missions are also being conducted in Tokyo, Japan and Doha, Qatar. #

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