Annotated Summary

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Araner (n.d.). District Cooling Energy System: All About the Cooling Process. Araner. https://www.araner.com/blog/district-cooling-energy-system-cooling-process/

This article focuses on how the process of the district cooling system works. According to Araner, water will be cooled to around 4-5⁰C in the chiller plant and pumped through insulated distributing pipes to each of the building’s heat exchanger. The heat exchanger is used to transfer the heat between the chilled water supply and the air conditioning system of the consumer building. Water will be returned to the chiller plant at warmer temperatures at about 13-15⁰C, after absorbing the heat from the individual building systems. Return water will be filtered and chilled again and return to the building. Hence, this system is also more efficient than conventional air conditioning. From the research by Araner, the benefits are that it increases cooling efficiency and reduced costs when compared to conventional cooling systems found in HDB flats. The district cooling system will also be reduced electrical demands which will reduce in power. It will also reduce the overall operating and maintenance costs, there is no need to maintain several condensing units. Instead of cooling towers, usually cooling towers are built on the roof of the building, district cooling system can offer efficient use of building space as the whole system will be built underground.

The article also provides a useful platform for our research project on implementing the district cooling system to post-en-bloc housing. As shown in the article, it gave a better understanding and clear insight into the approach to the district cooling system. According to the research by Araner, the district cooling system uses water as a refrigerant to cool the building, unlike conventional cooling systems that use hydrochlorofluorocarbons (HCFCs) as refrigerants. The district cooling system is a cost-effective and energy-efficient cooling system for housing in Singapore, as well as reducing the amount of CO2 emissions.


Revised 5th December 2020

Comments

  1. BryanNovember 23, 2020 at 6:49 PM

    Dear Celine,

    Thank you for helping us to summarize the article, through your annotated summary, we can learn how back conventional cooling system is, and how useful district cooling system that uses chilled water supply instead of hydrochlorofluorocarbons.

    You shared how chilled water plant works with the heat transfer from the water to the air, and even the difference in the temperature, you even shared you personal view and how this could relate to your research.

    You even gave the benefits of the chilled water supply district cooling system by sharing with us on how it is both cost and energy efficient, and how it could reduce the amount of carbon dioxide being emitted, which can also help to fight against global warming.

    Yours sincerly,
    Bryan

    ReplyDelete
  2. Clement TenNovember 23, 2020 at 10:17 PM

    Good afternoon Celine,

    Thank you for this helpful annotated summary! You specifically described how the chilled water is chilled and transported to the users in the district cooling system. You have also included important numbers like “4-5 ⁰C” and “13-15⁰C”¬¬ when regarding chilled water output temperature and return temperature.

    This information is vital for our project as we describe in detail the district cooling system in our report.

    Thank you for your hard work!

    With gratitude,
    Clement Ten.

    ReplyDelete
  3. dexterNovember 28, 2020 at 4:08 AM

    Good evening Celine

    First of all thank you for this informative summary! I was very impressed and amazed how detail you were comparing the conventional system to the district system. You managed to do a deep dive by highlight the exact temperature range the water will be return back to the chiller plant.

    The summary you wrote was very useful in the team's technical report as it clearly state the advantages of using the district cooling system. How it can not only benefit the environment by replacing harmful substance such as HCFC with chilled water.

    Thank you for the excellent work!!!

    Best regards,
    Dexter

    ReplyDelete
  4. RueNovember 28, 2020 at 9:12 PM

    Dear Celine

    Thank you for your annotated summary. You managed to summarize how the district cooling system works. The efficiency of your district cooling system were also highlighted.

    I particularly like the fact that the refrigerant in your district cooling system bring about less harm to the environment than the conventional water cooling system. This way, you not only bring about a more efficient system to the post-en-bloc buildings, but also a more environmentally friendly option.

    Keep up with the good work.

    Regards
    Rue

    ReplyDelete
  5. Brad BlackstoneDecember 6, 2020 at 4:30 AM

    I really appreciate the fine revision, Celine.

    ReplyDelete

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