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With The Rise Of Heat Waves In Cities, Researchers Seek Solutions To Ease Thermal Discomfort In Public Spaces. A New Technology Could Change The Game.
With The Rise Of Temperatures Caused By Climate Change, Densely Populated Cities Face An Urgent Challenge: Protecting Their Populations From Extreme Heat. For This Reason, A Technology That Cools The Environment Is Being Developed.
In Many Large Cities, For Example, The Combination Of Concrete, Asphalt, And Lack Of Vegetation Makes The Environment Even Hotter, Aggravating The So-Called Urban Heat Island Effect.
With This In Mind, Engineers From The University Of California In Los Angeles (UCLA) Developed A New Technology That Could Transform The Way We Deal With Heat In Cities.
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Innovative And Accessible System
The Proposal From UCLA Is Simple, Efficient, And Low-Cost. It Involves A System Of Semi-Transparent Radiant Panels Capable Of Reducing Radiant Temperature By Up To 5.5 °C.
The Great Innovation Lies In The Fact That The Environment Is Not Enclosed Or Darkened.
The System Allows People To Continue Seeing Their Surroundings While Protecting Themselves From Excessive Heat.
This Advance Is Especially Useful For Open Spaces Where The Use Of Air Conditioning Is Unfeasible, Such As Parks, Bus Stations, Markets, And Playgrounds.
Furthermore, The Structure Is Modular, Safe, And Can Be Easily Installed In Different Environments.
Invisible Radiation, Real Discomfort
The Idea Behind The New Technology Is Based On A Little-Discussed But Fundamental Concept: Mean Radiant Temperature.
Even If The Air Is At A Pleasant Temperature, Such As 28 °C, Surfaces Heated By The Sun, Such As Concrete Or Metal, Radiate Heat.
This Makes The Human Body Perceive Much More Heat Than Is Actually Present.
To Combat This Problem, Engineers Created A Structure That Combines Different Elements.
Aluminum Panels With Cold Water Circulating Internally Help To Keep The Temperature Low. These Panels Are Also Painted Black On The Inside To Better Absorb The Heat Of The Structure And Increase Efficiency.
Semi-Transparent Film Blocks Heat
The Structure Resembles A 3×3 Meter Tent.
It Has Walls Made Of A Partially Metalized Polymer That Allows The Passage Of Visible Light But Blocks Infrared Radiation, The Main Responsible For The Sensation Of Heat.
The Roof Uses Panels Designed For Passive Radiative Cooling, A Technique That Does Not Depend On Electricity To Function.
This Combination Allows The Structure To Function Efficiently Without Causing A Sense Of Confinement. In Practical Tests, People Reported A Clear Difference Compared To Structures That Only Provide Shade.
Practical Application In Cities
The Great Advantage Of The System Is That It Can Be Immediately Applied In Different Contexts. Among The Places That Could Benefit From The Innovation Are:
- Bus Or Subway Stops Without Cooling.
- Public Parks With Little Natural Shade.
- Outdoor Markets And Fairs.
- Schools And Children’s Spaces.
As The Cost Is Reduced And The Structure Is Modular, Installation Can Be Done Without Major Interventions. This Is Especially Important For Poorer Neighborhoods, Where Thermal Comfort Options Are Limited.
Project With Social And Climatic Focus
This Development Is Part Of The Heat Resilient LA Program, Linked To The Sustainable LA Grand Challenge Initiative Of UCLA.
The Aim Is To Find Concrete Solutions To Protect The Population From Extreme Heat, Especially Vulnerable Communities.
The System Is Also Funded By The National Science Foundation And Aligns With Recent Measures In California.
One Of These Is Assembly Bill 2238, Which Recognizes Extreme Heat As A Climate Risk And Proposes Direct Actions For Alert And Prevention.
More Than A Shadow
This New Technology Is Not Limited To Providing Shade. It Represents An Important Step Towards Cities That Are More Prepared For The Future. Among The Main Benefits Are:
- Reduction In Air Conditioning Use, Reducing Energy Consumption And Emissions.
- Encouragement Of Public Space Use Even On Very Hot Days.
- Protection For Professionals Working Outdoors, Such As Street Vendors Or Waste Collectors.
- Easy Adaptation To Different Locations, With Structures That Can Be Permanent Or Temporary.
By Combining Technology With An Urban And Social Perspective, The Solution Developed By The UCLA Team Shows That It Is Possible To Face Extreme Heat In A Practical, Efficient, And Accessible Way.
The Project Paves The Way For A Transformation In The Way Cities Deal With Climate Change, Without Forgetting The Most Affected Populations.
With Simple Structures And Innovative Materials, This Initiative Promises To Improve Thermal Comfort While Making Urban Environments More Livable, Safe, And Sustainable. The Future Of Cities May Literally Be In The Transparency Of A New Shade.
