Sun Tower | ITSLIQUID

Sun Tower

Architecture | October 10, 2023 |

Sun Tower 001
Image courtesy of OPEN Architecture

Sun Tower
Location: Yantai, China
Status: ongoing

OPEN has revealed the design for its under-construction Sun Tower project on the coast of Yantai, a booming city on the coast of the Yellow Sea. Recipient of the Jeu d’Esprit Special Prize of AR Future Project Awards 2021, the Sun Tower comprises a semi-outdoor theatre on the ground, a winding exhibition space, and a library in the sky. The building also has a unique semi-outdoor space at the top, referred to as the “phenomena space“, designed for people to observe the magnificent natural phenomena throughout the year.

Sun Tower 002
Image courtesy of OPEN Architecture

The name of the city of Yantai means “Beacon Tower” and was derived from the series of watchtowers built during the Ming dynasty as a warning against impending attacks on the coastline. The city wanted to create a landmark on the coast, its fast-developing new district, one of the earliest special economic zones in the country and an industrial powerhouse today. OPEN’s response to the design brief was to move towards a more purposeful structure, something that would evoke the ancient rituals of nature-worship while providing much-needed cultural facilities in the newly urbanised district. Yantai is also often noted for its beautiful views of sunrise across the Yellow Sea, something the architects would embrace in their design.

Sun Tower 003
Image courtesy of OPEN Architecture

The form of the building is a large curvilinear structure; the structure’s shape is designed according to careful studies of the sunlight and appears sliced open by beams of light, revealing the interior spaces to the majestic sea. The 50-metre high structure sits inside a gently sloping plaza. The building is a composite shell structure, two layers of slanted white concrete shells are connected and braced by horizontal slabs and ramps. This complex design has been achieved through close collaboration with engineering firm Arup.

Sun Tower 004
Image courtesy of OPEN Architecture

“Today it’s so important to find ways to connect and embrace nature, we wanted to keep this central to the concept of the Sun Tower and pay respect to the power of the surrounding landscape. Immediately when we conceived of the design we wanted to reference ancient human rituals, honouring the sun, moon, and stars, and offering a space for reflection and contemplation. On the other hand, we also wanted to ensure the building had an authentic purpose and function, something that would be of benefit to the citizens of Yantai rather than just a folly on the beach. Creating spaces that juxtapose the incredible ocean views with the forward-thinking digital exhibitions that explore nature.” — LI Hu + HUANG Wenjing, founding partners of OPEN

Sun Tower 008

Facing the ocean, the concave inner shell of the Sun Tower acts as a sound collector, absorbing and amplifying the sounds from the sea. The smaller upside-down upper shell houses the light-filled library and the ‘phenomena space’ with a breathtaking view of the ocean and the sky above. An oculus in the centre of the phenomena space’s ceiling allows rainwater to enter and fill a small pool underneath in the summer. In the winter, the pool will be dry and used as a fireplace. In the early design phase, working with French firm dUCKS scéno, OPEN conceived the exhibition spaces inside the building with a focus on digital exhibitions and big data technologies, while also simultaneously being an energising force for the long-term growth of this new city.

Sun Tower 006
Image courtesy of OPEN Architecture

Aric Chen, the current General and Artistic Director of Het Nieuwe Instituut in Rotterdam who, in his previous role as Director of the D&I Curatorial Lab at Tongji University in Shanghai, consulted on the project from the curatorial perspective, working with OPEN to develop this idea of a digital museum that would link the digital with the phenomenology. Aric Chen said: “OPEN has a remarkable ability to take on an architectural assignment and infuse it with meaning and purpose; in their hands, form follows content. From educational institutions to cultural projects across China, they’ve shown time and time again how architectural innovation and social innovation go hand in hand”.

Sun Tower 007
Image courtesy of OPEN Architecture

At the base of the tower, in the plaza also designed by OPEN, a shallow pool completes the circular shape and features misting devices and spouting fountains. A specially designed water channel cuts across the plaza-a ruler of time-this is the straight line that the shadow of the Sun Tower will follow on the day of the equinox. A series of elliptical rings are set in the pavement pattern; the intersections between the rings and the water channel mark the building shadow’s footprint at specific hours on the equinox day. At one of the outer rings, a series of fountains were designed to celebrate the 24 Solar Terms of the Traditional Chinese Calendar; on normal days they are synced with high and low tides. These carefully planned water features add to the sense of liveliness, while also reflecting upon the city’s long history of oceanic culture which is rare in China. The project is expected to be open to the public in 2024, and it’s featured in OPEN’s forthcoming book Reinventing Cultural Architecture: A Radical Vision by OPEN published by Rizzoli in April 2022.

more. www.openarch.com

Sun Tower 009
Sun Tower 005
Image courtesy of OPEN Architecture

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