Buildings account for the largest proportion of greenhouse emissions in Hong Kong, currently that is sixty three percent (63%) of Hong Kong’s carbon footprint. Whilst initiatives for new buildings are indeed welcome, the influence of the measures are limited to 500-600 new buildings, a very small proportion of the total 40,000 buildings in Hong Kong.
Improving the existing building stock is critical issue, and one solution is tuning your building. If you owned a vehicle – would you run it year after year without a regular tune-up? of course not, yet buildings are often run for fifty years or more, without tuning.
Behind the glass façade air-conditioning, lighting and other environmental systems of commercial buildings, hotels, shopping malls are burning electricity contributing to the Hong Kong carbon footprint, for efficient operation the engineering systems need to be tuned and optimised and I would argue that it should be conducted annually.
One interesting point I have noticed, often I find firms have an elaborate ISO 14000 EMS (Environmental Management Systems) protocols in place, seemingly unaware that the building energy consumption is causing a larger, and more significant environmental impact!
Building Tuning means optimising the operation of the energy systems, including the chiller plant, pumps, and other systems to identify opportunities to lower the building carbon footprint based on today’s operating environment.
It is one of those facts of life, things change. For a building it is no different except it doesn’t it complain so loudly. Electrical tariffs, usage, building codes, the neighbourhood is a little more crowded, social pressure, these and other influences occur over the operating life of a building and may impact the building energy consumption.
Other influences include new legislation also play a role. For example the relaxation on the use of water and cooling towers for air conditioning systems in 2000, offers opportunities to lower operating costs for hotels and other commercial buildings in Hong Kong.
One approach is the hindsight method – review all every engineering system as if it was a new project – what would you do differently today?
The electricity tariff for commercial buildings in Hong Kong island is significantly higher than Kowloon. Is this fact taken into consideration when designing a building for Kowloon side or HK island? In my experience unfortunately not. The main reason often cited is the structural disconnect between building developers don’t pay the fuel and electricity bills. All the operating costs are paid by the tenant, including any core services such as air conditioning, which is charged in the form of a management fee, charged by square foot not actual usage.
Building Tuning is not limited to just office buildings, factories and manufacturing facilities are not immune to the influence of change.
When you lead others follow
Presently, any tenant of a grade A building in Hong Kong looking to lower their carbon footprint presently has limited opportunities while the primary cost, the cost of air-conditioning, is charged on a square foot basis irrespective of actual consumption. Now that’s true for the majority. However, some innovative developers have seen the light, and have started to provide a metered service, therefore tenants will only pay for the actual usage.
Buildings don’t have any voice to complain, and let you know where the problems are located. A buildings Total Cost of Ownership (TCO) is correlated with its annual energy consumption, over its entire life the OPEX (Operating Expense) is significantly higher than its CAPEX (Capital Expenditure), mortgage, cost of finance, etc. For single owner buildings its a no brainer, the real challenge is multi-owner buildings.
I talked with a client last week regarding his facility, apparently it emerged that a competitor had already completed some work, and now they needed the same work stat. To remain competitive and distinctive in the market place, you either lead or follow.
Kelcroft E&M Limited
helping lower the cost and impact of doing business in Asia