Green Campus, Ecology, and Expansion History — The Hong Kong University of Science and Technology

HKUST’s Clear Water Bay campus, perched on a coastal hillside adjacent to natural woodlands and a bay, enjoys ecological conditions rare among Hong Kong’s university campuses — to the extent that since its founding, it has drawn seawater directly from Clear Water Bay to cool the campus. From 2019, the university has systematically advanced its “Sustainable Smart Campus as a Living Lab” initiative, turning the campus itself into a research platform to explore synergies between green building, energy management, and biodiversity conservation.

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# 1. Sustainability Strategy and Net-Zero Targets

# 1.1 Overall Goal Framework

HKUST has formulated its “Net-Zero Action Plan”, aiming to achieve net-zero greenhouse gas emissions for Campus Scope 1 and Scope 2 by 2045^※.

Phased near-term targets:

# 1.2 Recent Energy Performance (2023–24 Academic Year)

According to data published on the HKUST Sustainability website^※:

• Annual energy consumption was approximately 101 million kWh
• Annual greenhouse gas emissions were approximately 40,466 tonnes of CO₂ equivalent
• Compared to the 2014 baseline, Scope 1 & 2 emissions have been reduced by approximately 38%^※

# 1.3 Energy-saving Measures

In the 2023–24 academic year, the university replaced 5,842 light fittings (switching to LED and dynamic sensor systems), achieving an average electricity saving of about 60%^※. It also completed regenerative drive upgrades on five lifts, saving approximately 30% in energy consumption^※.

Renewable energy: An additional roughly 158 kW of rooftop solar panels were installed (a 6% increase on the previous year); by 2022–23, cumulative on-campus renewable energy generation had exceeded 9.5 million kWh^※. Experimental projects include a 160 m² photovoltaic green roof test plot, elastocaloric cooling technology (a 200W refrigerator and 500W air-conditioner prototype test), and passive radiative cooling experiments.

Electric vehicle charging: Around HK$40 million was invested to upgrade the car park, equipping about 30% (roughly 360 spaces) of parking bays with at least 7 kW EV charging facilities^※.

# 1.4 ‘Race to Zero’ Action Plan: A First among Local Universities

On top of its phased energy targets, HKUST formally released a systematic net-zero roadmap in recent years. According to the university’s announcement, HKUST published the first comprehensive “Net-Zero Action Plan” among local universities, adopting “Race to Zero” as its overarching framework^※. The plan’s core commitments can be distilled into three sets of figures:

• 2045 net-zero: Achieve net-zero Scope 1 & 2 greenhouse gas emissions for the campus;
• 2035 interim target: Reduce emissions by 50%^※ from the baseline;
• Progress to date: Since its first sustainability master plan was unveiled in 2014, greenhouse gas emissions have already fallen by roughly 34%^※.

To underpin this roadmap, HKUST has committed to investing around HK$30 million over the next eight years to trial new climate-tech solutions on campus^※, extending its longstanding “campus as a testbed” ethos. Among these efforts, the campus’s 2.5 MW solar photovoltaic system is the largest of its kind among comparable institutions in Hong Kong^※, and feed-in tariff revenues are cycled back to fund further carbon-reduction innovations.

On the frontier of “embodied carbon”, HKUST has set concrete benchmarks: according to the announcement, the Martin Ka Shing Lee Innovation Building, scheduled to open in 2025, will have an embodied carbon figure below 500 kg CO₂e/m²—a roughly 30% improvement on the Hong Kong baseline of 800 kg CO₂e/m²^※. In other words, the university’s carbon-reduction efforts are extending beyond operational energy to the carbon footprint locked into construction materials and methods — a comparatively advanced approach among Hong Kong universities.

From the perspective of institutional narrative, the phrase “first comprehensive net-zero action plan among local universities” continues HKUST’s habitual self-positioning as a “first mover”: much like its “first” narratives in blockchain credential authentication or the sustainable smart campus, the net-zero roadmap is folded into the university’s overarching discourse of “addressing real-world challenges through technology.” In keeping with our rules, this archive does not relay any related external contentious or critical discussions.

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# 1.5 Seawater Cooling and Central Chiller Plant — The ‘Natural Air Conditioning’ Present since Founding

Among HKUST’s many energy-saving measures, the one most distinctive to the university and the earliest to be put into practice is the central chiller plant that has drawn seawater directly from Clear Water Bay for campus cooling since the institution was established.

# Why seawater cooling from the outset?

The Clear Water Bay campus is surrounded by sea on three sides, and the planners seized on this geographical advantage: seawater-cooled central air conditioning was a pioneering technology adopted from the earliest days of HKUST, initially serving the air-conditioning systems of the Academic Building^※. Compared with conventional air-cooled chillers, the seawater off Clear Water Bay remains below Hong Kong’s summer air temperature year-round, offering higher heat-exchange efficiency, and it eliminates the need for large cooling fans on rooftops, substantially cutting energy use and noise. This choice was an unusual engineering decision among Hong Kong universities in the 1990s.

The logic of the Central Chiller Plant is “centralised heat exchange, piped delivery”: chillers cool water to a set temperature and pump it through an underground network to air-handling units (AHUs) in each building; the return water, now warmed, passes through a condenser water loop that rejects waste heat into Clear Water Bay. The seawater, having absorbed the heat, is discharged back into the bay at a regulated temperature, avoiding thermal pollution^※. Waste heat from the condenser water is recovered to provide hot water for campus facilities^※, achieving simultaneous cooling and heating.

# Expansion 2012–2015: From Academic Building to District Cooling System

In the early years, the Central Chiller Plant mainly served the Academic Building. The turning point came in 2012, when HKUST planned the eight-storey Cheng Yu Tung Building (CYT)^※. The decision-makers faced a choice: build a standalone air-cooled chiller system for the new building, or expand the existing seawater chiller plant to cover it. The university chose the latter, remodelling the plant into a district cooling system serving multiple buildings.

The works began in 2013 and were completed in 2015^※. The core measures included replacing three of the nine original chillers with new models that were roughly 18% more efficient^※, and extending the pipe network to connect the Cheng Yu Tung Building. This expansion also reserved connection capacity for the Shaw Auditorium (which opened in 2021), so that the district cooling system now covers major facilities including the Academic Building, Cheng Yu Tung Building, and Shaw Auditorium, and has been incorporated into the design of the Jockey Club i-Village, which opened in June 2026^※.

Verifiable energy and cost savings are as follows:

Mark Hodgson, then Vice-President for Administration and Business at HKUST, said of the project: “It is a testament to the University's commitment to be a global leader in sustainability education and to put this vision into practice.”

# 2016 Asia-Pacific Regional Energy Project of the Year Award

The Association of Energy Engineers (AEE), in its 2016 review, awarded the Asia-Pacific Region “Energy Project of the Year” to The Hong Kong University of Science and Technology^※ for the project officially titled “A Successful and Sustainable Energy Efficiency Upgrade by Remodeling of Central Chiller Plant to a District Cooling System.” The AEE is one of the world’s most authoritative professional bodies for energy engineering, and this award confirmed that the project met industry-recognised standards across the three dimensions of energy saving, cost reduction, and environmental benefit.

At the institutional level, HKUST in 1997 became the first institution in Southeast Asia to introduce an “Energy Performance Contract” mechanism^※ — contractors that successfully cut electricity bills share the savings with the university, using commercial incentives to drive long-term energy conservation.

# Recent Cooling Tower Upgrades and Water Recycling

Global warming has raised seawater temperatures, diminishing the efficiency of pure seawater heat exchange. To address this, HKUST installed four cooling towers on the library rooftop, each with a heat-exchange capacity of roughly 4,900 kW (total about 19,600 kW), to serve as an auxiliary heat-rejection facility for the seawater cooling system^※. The towers use evaporative cooling: outdoor air comes into direct contact with falling water film, dispersing heat into the atmosphere through evaporation, lowering the condenser water temperature and reducing the load on the main chillers. This dual-track architecture — “seawater primary, cooling towers auxiliary” — keeps the system operating efficiently even during extreme heat. According to a technical visit record by the Hong Kong branch of the Institution of Mechanical Engineers (IMechE), the cooling tower upgrade is estimated to save roughly 1.8 million kWh of electricity per year^※.

During operation, the cooling towers require a continuous bleed-off to keep water quality within the acceptable levels prescribed by Hong Kong’s Electrical and Mechanical Services Department (EMSD) operating procedures^※. This bleed-off water is not discharged directly but is piped to the library’s flushing system, achieving water recycling: the design daily water saving is about 5.865 m³, and in 2022 the total bleed-off water measured was approximately 8,724 m³, with an average flow rate reused for flushing of about 0.784 L/s^※.

The cooling system to which the Central Chiller Plant belongs accounts for roughly 20% of HKUST’s total annual electricity consumption^※, making it the single largest source of campus electricity demand (the Academic Building and the chiller plant together represent about 72% of annual consumption). Ongoing optimisation of the cooling system is therefore one of the critical paths to the 2028 sustainability targets. On the technology frontier, SSC projects are testing passive radiative cooling coatings — applied to the external surfaces of cooling tower water tanks, they radiate heat into space via the atmospheric infrared window, lowering the temperature of the heat-exchange water loop. In theory, this could further reduce cooling energy demand, although commercialisation has yet to be verified and data collection continues.

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# 2. Sustainable Smart Campus as a Living Lab

# 2.1 Programme Background

The Sustainable Smart Campus as a Living Lab (SSC) initiative was formally launched by the university on 19 February 2019, with an initial three-year funding allocation of approximately HK$50 million^※. The stated goal was “to transform HKUST’s campus into a testbed for learning, experimentation, and the advancement of smart, innovative ideas to address real-world challenges,” with the hope of inspiring Hong Kong’s wider evolution into a sustainable smart city.

The first round of the programme selected nine pilot projects spanning areas such as facial-recognition user experience at the library, visual-art installations promoting healthy behaviour, a real-time big-data pedestrian-flow platform, a 100% renewable-energy microgrid, indoor navigation, and bus analytics.

# 2.2 100% Renewable Energy Smart Microgrid

In spring 2019, polycrystalline silicon solar panels were installed on the rooftop of the CYT Building (Cheng Yu Tung Building) and connected to an innovative e-fuel energy-storage system, building a stand-alone “smart microgrid” on campus^※ to verify the feasibility of 100% renewable power supply on a tropical urban campus.

# 2.3 Large-scale Solar Power System

HKUST announced the push for Hong Kong’s largest university-campus solar power project, with an estimated annual generation of about 3 million kWh — equivalent to the yearly electricity use of more than 900 three-person households — and an expected reduction of roughly 1.5 million kg of carbon emissions over 25 years^※.

# 2.4 Smart Campus Monitoring Systems

The university has deployed a campus-wide sub-metering system that provides real-time monitoring of air-conditioning systems, electricity usage patterns, and renewable energy generation, underpinning carbon-emission data management. In addition, it developed a green labs programme to optimise fume-hood operations and began drafting procurement guidelines for ultra-low-temperature freezers.

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# 3. Green Building Standards

# 3.1 Net-Zero Building Policy

HKUST requires all new buildings to meet “net-zero building standards,” following the low-energy-design and renewable-energy requirements of BEAM Plus Platinum certification. Design teams must document in writing how they will enhance ecological value and preserve existing ecosystems and woodland resources^※.

# 3.2 Green-Certified Buildings

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# 3.5 Waste and Water Management

Beyond energy and buildings, HKUST has also taken concrete, and in some cases early, steps on waste reduction and water conservation — pioneering measures among Hong Kong universities.

# “Plastic Bottle-Free Campus”: Bottled Water Ban from 2017–18

HKUST was one of the earlier Hong Kong universities to ban disposable plastic bottled water. According to the university’s sustainability materials, from the 2017–18 academic year, HKUST banned the sale and distribution on campus of single-use plastic bottled water in containers of less than 1 litre, aiming to become a “disposable-plastic-bottle-free campus”^※. To support the ban, staff and students are encouraged to carry their own bottles, and more than 150 water dispensers have been installed across campus for refilling^※.

The ban is notably decisive — it is not a “please use less” campaign but a direct prohibition on the sale of small bottled water, cutting off the supply of disposable plastic bottles through institutional means. The network of over 150 dispensers ensures the ban does not cause undue inconvenience. This “ban plus supporting infrastructure” combination is an example of how HKUST embeds sustainability thinking in the details of daily life.

# Food Waste Collection and Composting

On food waste management, according to university records, a food-waste collection and recycling programme was launched at the canteens in September 2016, and later extended to junior staff quarters and office pantries^※. In the 2020–21 academic year, HKUST joined the “Food Waste Source Separation Scheme” organised by the Hong Kong Productivity Council, diverting 389 tonnes of food waste into animal feed and compost^※. The campus also introduced a composter capable of transforming up to 100 litres of organic waste into compost, along with shredders and mixers to handle organic matter^※.

“389 tonnes of food waste turned into feed and compost” is a quantifiable waste-reduction outcome — it turns organic matter that would otherwise go to landfill into a useful resource, embodying the concept of regenerative systems. This philosophy is consistent with one of the six design principles of the Guangzhou campus (see Architecture and Sustainable Design of the Guangzhou Campus^※).

From the perspective of institutional narrative, while initiatives such as the bottled-water ban and food-waste collection may be less “majestic” than solar farms or a net-zero plan, they land closer to the daily experience of staff and students — translating sustainability from a university-level strategy down to the micro-level of “every bottle, every scrap of food waste,” extending the Sustainable Smart Campus idea into the texture of everyday life.

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# 4. Landscape Conservation and Biodiversity

# 4.1 Biodiversity Governance

HKUST has established a Biodiversity Steering Committee that meets every two months to review campus landscaping operations and formulate measures to improve ecological value^※. The university has also drawn up a “Tree Planting and Felling Policy” that requires any timber from removed trees to be used sustainably.

The fitting-out of the new Student Center is a textbook case of waste-wood reuse: Because Acacia confusa trees that had grown for many years on the site had to be removed for the construction of the Martin Ka Shing Lee Innovation Building, the university had the timber processed and re-used for the stepped base panels, benches, and standing-height desktops in the new Student Center, which opened in December 2023^※, so that “their lives continue in another form.”

# 4.2 HKUST Biodiversity Map

The HKUST Biodiversity Map is a citizen-science project jointly undertaken by students and staff, aiming to create an interactive map showing the habitat distribution of various organisms on campus^※.

As of the project phase reported, the map had already recorded over 187 individual species records, covering four categories: butterflies, birds, coastal marine species, and trees, each with accompanying specialist notes^※. The project is jointly spearheaded by Prof. Cindy Lam of the Department of Ocean Science and Helen Wong of the Dean of Students’ Office, and four biodiversity field-study routes have been designed to allow students to participate through fieldwork.

# 4.3 Ecological Sustainability Research Projects

Under the Sustainable Smart Campus project framework, several ecological restoration initiatives deserve attention:

• Oyster reef restoration: The “Restore Marine Ecosystem with Smart Oyster Reefs” project, led by Larry Li and Dean Chan, is carrying out oyster-reef ecological restoration along the campus shoreline^※.
• Bird monitoring: Projects such as “You Will See a Birdwing” (Round 6), led by Cindy Lam and others, systematically record migratory and resident birds on campus.
• Campus pond upgrade: The “Pond Water Treatment System Upgrade” project has improved the water quality of on-campus ecological ponds.
• Internet of Tree Things: Led by Wang Yu-Hsing, this project uses sensors to monitor campus tree health in real time.

# 4.4 Composting and Soil Management

HKUST has a dedicated area at the LG7 Conservation Zone to store landscape waste and on-site-produced compost; shredded leaves are used as mulch on exposed soil to retain moisture and replenish natural nutrients; compost is applied to flowerbeds, and “compost tea” is trialled on lawns, creating a closed-loop use of garden waste^※.

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# 5. Marine Science Research Facilities

HKUST is the only university in Hong Kong that manages a coastline, and it is also one of the very few in Asia (some sources claim it is the only one in Southeast Asia) to possess a waterfront marine research facility on its own campus^※.

The Department of Ocean Science (OCES) operates the Ocean Research Facility (OCRF), situated right beside the campus shore, giving direct access to Hong Kong’s eastern waters for field sampling. Major research directions include:

The primary field-research areas cover the Pearl River Estuary, Hong Kong’s nearshore bays, and deep-sea regions of the South China Sea. The campus coastline itself lies in relatively pristine eastern waters with good water quality, offering uniquely convenient close-range research conditions for numerous coastal ecology projects.

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# 6. Major Recent Expansion Projects

# 6.1 Medical Education and Research Complex

On 28 April 2026, HKUST held the ground-breaking ceremony for its Medical Education and Research Complex^※, marking the official start of construction for Hong Kong’s third medical school.

• Location: Main Clear Water Bay campus
• Architectural design: Led by internationally renowned firm Skidmore, Owings & Merrill (SOM), in collaboration with local architectural consultant Wong Tung & Partners Limited (WTPL)^※
• Scale: Eight storeys, comprising a three-storey podium and a five-storey tower, with a total gross floor area of approximately 6,000 m²^※
• Design highlights: The façade features a “jewel box” triple-layer low-e glazing; the podium houses an auditorium, library, canteen, classrooms and display areas, while the upper floors contain faculty offices and research laboratories; spacious atria on the third and sixth floors, plus a large stepped amphitheatre overlooking Shaw Plaza and cascading landscape steps^※
• Cost: Approximately HK$2 billion (about US$256 million), self-financed by HKUST^※
• Timeline: Foundation works were largely completed by mid-April 2026; completion is expected in mid-2028, with the first cohort of 50 medical students entering in the 2028–29 academic year and the first graduates expected in 2032^※
• Interim nature: This building will serve as the medical school’s initial temporary quarters until the permanent medical campus in the Northern Metropolis (Ngau Tam Mei Development Area) is completed (expected 2033–34), after which the school will relocate in its entirety to the new site.

# 6.2 Jockey Club i-Village

The Jockey Club i-Village officially opened on 11 June 2026, providing 1,551 undergraduate bed spaces. The project was supported by a donation of over HK$203 million from The Hong Kong Jockey Club Charities Trust, and has a construction floor area of roughly 35,500 m²^※. The building was designed by Zaha Hadid Architects in collaboration with Leigh & Orange. Its hexagonal layout spreads across four blocks embedded into a hillside with a drop of about 25 metres; a skybridge on the top level organically connects the southern residential zone with the northern academic blocks, substantially improving the previously fragmented pedestrian experience between North and South Campuses. Solar panels and connection to the campus’s central chilled-water system were integrated into the design, and the building has received a provisional BEAM Plus Platinum rating.

# 6.3 Martin Ka Shing Lee Innovation Building

Located near the South Gate, the Martin Ka Shing Lee Innovation Building broke ground in November 2022, with a design capacity of around 5,100 m² of net usable floor area, and was scheduled for completion in the second quarter of 2025^※. The building focuses on interdisciplinary areas including robotics, artificial intelligence, data science, sustainable living, and health sciences. It employs sustainable materials such as low-carbon concrete and recycled steel reinforcing bars, along with passive-building energy-saving design and a rooftop photovoltaic system.

# 6.4 New Student Center

The New Student Center opened in December 2023, adjacent to the North Gate and the Red Bird Sundial^※. It features study carrels, nap pods, and open-plan learning spaces, with an emphasis on biophilic design — large windows draw in natural daylight, and indoor plants help purify the air. A 13-month tracking survey of nearly 400 nap-pod users found that roughly 40% managed to fall asleep, 94% rated the sleep quality as “fair or above,” and 77% felt their energy was adequately restored.

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# 7. External Collaboration and Social Outreach on Campus Sustainability

HKUST has collaborated with Hong Kong’s Environmental Protection Department to develop a greenhouse-gas emissions calculator, helping local financial firms improve the quality of their sustainability reporting^※. It hosts an average of about 30 Sustainable Smart Campus tours each year (from June 2024 to August 2025), receiving secondary-school groups and industry visitors, and turning the campus’s sustainability practices into public education resources.

The university also co-organises the annual “Climate, Weather and Water Forum,” providing academic input on net-zero policies for Hong Kong and the Greater Bay Area; it has also engaged in industry–academia collaboration with Sino Group on that group’s 2050 net-zero roadmap.

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# 8. Matters for Which No Records Were Found

• Systematic survey report on intertidal species of Clear Water Bay: Related research projects exist (oyster reefs, bird monitoring, etc.), but a systematic public report specifically on the campus intertidal zone was not found. This entry is recorded as “no record found.”
• Campus museum / exhibition space: HKUST has a visitor information centre and a Center for the Arts, but no dedicated permanent museum or specimen exhibition space was identified. This entry is recorded as “not applicable.”

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