img(height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=2939831959404383&ev=PageView&noscript=1")

Inflatable ring offers lifeline for urban heat islands

Words:
Stephen Cousins

As climate change makes urban environments grow ever hotter, an inflatable ring supported by temporary stilts could bring welcome cooling shade

Urban shield.
Urban shield. Credit: Josema Cutillas

An abundance of concrete, a lack of green space and streets heaving with cars and buses all contribute to an urban heat island effect that ratchets up temperatures in cities compared to rural areas.

One innovative architectural response to the problem, developed by Czech studio Kogaa and hot air balloon maker Kubicek, takes the form of a giant inflatable ring on stilts, providing a cool shaded canopy for events in public spaces.

The 14m diameter modular transportable venue, known as Air Square, was created to improve the quality of urban environments, raise awareness of climate change adaptation and activate underused urban spaces by giving them a purpose.

According to Kogaa, the inflatable provides a large surface to shield from the sun, and its circular shape provides a “bigger reach of shading” compared to a straight wall, helping significantly cool down urban areas.

A version of the structure has been installed at Budapest’s City for the Future 2022 smart city expo, where various solutions to issues experienced by cities and municipalities are on display.

Air Square is suitable for functions such as performances, farmers markets, or as all-in-one public furniture with integrated seating, lighting, and shading. The ring absorbs sound generated within it to shield neighbouring properties and softly distributes daylight. At night it can be illuminated to make darker corners of the city more accessible.

  • Urban shield.
    Urban shield. Credit: Josema Cutillas
  • Urban shield.
    Urban shield. Credit: Josema Cutillas
  • Urban shield.
    Urban shield. Credit: Josema Cutillas
  • Perspective.
    Perspective.
  • Axonometry.
    Axonometry.
  • Plywood column.
    Plywood column.
123456

The reusable kit-of-parts system, complete with assembly instructions, combines a timber structural foundation with a lightweight inflatable polyester cushion above.

The completed structure is 6m high and comprises CNC-cut plywood planks bolted together to form a circular load-bearing frame with vertical legs and horizontal benches, and openings for people to pass through. This base, in combination with a fastening system, helps anchor the ring and resist wind forces.

Climate change has intensified the urban heat island effect in many cities during the peak summer months. A recent report attempted to quantify the impact on US cities and found that New Orleans was an average 8.9°F hotter than its surroundings, followed by Newark, New Jersey, at an average 7.7°F hotter, then New York City, at 7.6°F hotter.

Minimising the use of concrete in buildings, pavements and other infrastructure, increasing the amount of greenery, and using nature-based cooling solutions in place of air conditioners have been identified by environment and urban experts as ways to counter the impacts.

Latest

Dramatic shifts are being planned for the way students learn to become architects, as the RIBA and ARB look at different routes to qualification, how to deliver experience, rebalancing specific knowledge and skill sets and CPD, writes Eleanor Young

What will the ARB consultation mean for the profession?

Want to be part of a four-year housing framework, help masterplan a new garden city or revitalise a heritage-rich site in Shrewsbury? These are the latest architecture contracts and competitions from across the industry

Latest: Four-year multi-region housing framework

A musical scored by Richard Hawley is the unlikely vehicle to tell the story of the fall and rise of the Sheffield estate through the eyes of three sets of occupants. Laura Mark booked a seat

The fall and rise of the famed Sheffield estate reaches the stage

Changing market priorities saw Morris+Company shift to a unitised facade system for its Featherstone Building, but respect for the ancient context was critical

A change of construction method kept context as a constant

How did Feilden Fowles make a nine-day fortnight work? Why did the firm do it, and what do clients make of it? Director Edmund Fowles reveals a work/life success story

How did Feilden Fowles make its new office schedule work for everyone?