Here is an interesting image, the infrared of Hong Kong Island promenade, the sum has been shining all day and the path is absorbing the sun’s energy, the walkway is warmer than its surroundings. At night, that stored energy keeps the area warm, warmer than the air temperature, a good example of the urban heat island effect.
Infra-red is accurate and very sensitive, the image even shows the edges of the manhole covers!
It is not too difficult to avoid this problem (remember white reflective roof post) choose a material with a high solar reflectance index (SRI) say 80 or above, that will reduce the energy absorbed.
Another, and some might say, a purist video, illustrating the simplicity of the perfect Circular Economy (CE) this one is from EU Environmental department.
The principle is very simple, an old product is the raw materials for the new product, but not necessarily the same product. The steel content from old vehicles has been using this model for decades because steel is expensive, it can be recovered, and processed into new products. Even aircraft, trains are all stripped bare to recover that valuable steel or aluminum to make the next product. Continue reading →
Great news from Beijing, mark your diary, on 20 March 2017, RTHK (www.rthk.org.hk) reported that “….the last large coal-fired power plant in Beijing has suspended operations, with the city’s electricity now generated by natural gas” LINK: http://news.rthk.hk/rthk/en/component/k2/1320043-20170319.htm Meanwhile here in Asia’s World city, burning coal for power generation continues.
It has been argued that the public can’t tell the difference between a building and a green building, from the outside buildings “look” the same. And advocates have argued the improved productivity is the key metric, although measuring that is a really challenge.
The Hong Kong Building Energy Code version 2012 rev1 and 2015 Lighting Power Density (LPD) requirement does NOT apply where the room lighting load does not exceed 100 watt (2012 rev1 page 13) and 70 watt (2015 page 14) respectively.
by implication the target is the TOTAL power (lighting and control gear). So what does that mean? for BEC 2015, it means a store room with total power is less than 70w you are not required to comply with the 9w/sqm LPD or the lighting control requirement.
Autocad 2017 follows the now annoying and traditional model, frequent incremental updates to extract the most money from users as possible. This latest version, takes longer to load than I can bear, and adds little functionality over the 2000 version, it should be better but sadly it is not.
Sure there are some minor incremental improvements, but nothing to write home about. In my world which is essentially 2D drafting, useful features are now hidden, requiring time consuming research for the 2017 version.
If you are a CAD user you know that screen real estate is important for productivity, the more you can see on the screen, the more you can do without wasting time zooming, right! But the new 2017 out of the box, wastes that real estate with enormous icons across the top of the screen. those are valuable pixels we need for work! there must be some way to switch to text, but research is needed to fix it, and I don’t have the time to go hunting for solutions. To me it proves that Autodesk is not serious, beginners will find the huge icon useful I guess, but I have been using Autocad for more than 20 years, I have my own shortcuts, to suit my work and I bet other users have the same set up, But every time Autodesk issue a new version I have to track down and edit the .pgp file.
Soon 2018 version will be issued, an architect somewhere will use it, forcing the rest of the design team to follow suit. Perhaps it is time to add an extra clause in the fee agreement to cover the cost for these incessant and largely unnecessary upgrades. Autocad block handling has never caught up to users real needs, perhaps by version 2020 they will catch up and understand some BASIC drafting needs, but don’t hold your breath.
Since 2000 Hong Kong installed approximately 9000 (wet) cooling towers according to EMSD, these provide heat rejection for comfort air conditioning, it follows the HKSAR Government policy to reduce energy consumption by 1,360 million kWh, and resultant greenhouse gas emissions by 950,000 tonnes annually.
Trying to do the “right thing” can seem somewhat overwhelming, sustainability has countless facets, we face too many issues where to start? You can’t change the whole world overnight right! One approach that works, pick ONE thing.
Focus on that single issue, overtime it will become second nature, once the habit is formed, then you can tackle the next topic. For me switching from canned shaving foam means the metal can, and propellent gas impacts are averted. Pick one thing!
The first time you open the hot tap or your shower you have to wait some time for hot water to arrive, during that waiting time the unwanted cold or tepid water is lost to the drain, obviously this occurs because the water inside the water pipe, between the water heater and tap is cold (the deadleg).
To reduce that waste water, the length of dead leg (green) should be as short as possible, for a 22 mm pipe, every linear metre of pipe contains about 0.32 litres of cold water.
In extreme cases the dead leg could be 10 metres in length, that equates to approx. 3.2 litres of waste water every day, or 1168 litres per year wasted.
Now that might not seem to be huge amount of water, but if you multiply that by 3,000,000 households in Hong Kong, you get the idea.
In Hong Kong apartments the length of hot water dead leg pipe is typically quite short because individual water heaters are mainly used, but not always. Presently there is no legislation in Hong Kong governing the maximum length of the hot water dead leg, whereas overseas in United kingdom for example, it is specified.
This photo nicely demonstrates the position of two water mains underground exposed by construction, the deepest water main is barely 250 mm below grade. Because it is shallow, close to the surface, that means 1) it can be easily damaged, and 2) cold water is not kept cold, due to warm soil temperatures in summer.
The most sustainable option for our buildings would be to make use of existing building stock, we find (thanks to the Hong Kong audit department) a gift – Hong Kong has schools which have been vacated, some vacated for many years, that have not been returned to Government, idle they serve no purpose, but they are an invaluable resource. the work has been done they have been built, they have infrastructure (water/drainage/power) and often very good links to public transport.
Sustainable Thinking Today
These vacant idle buildings can immediately be opened and put to good use, I can imagine several solutions, that could meet societies needs today:
Small Business Incubator, think PMQ++ there countless classrooms available, offer low rent office/workshops (lower density than classrooms). Common rooms to be used as collaboration space, think tank spaces, like the common areas at Google. If the school has metal workshop, craftsmen can create, or teach. Learning from PMQ businesses that merely sell imported products and add no value, would be excluded.
The Hong Kong Government has created an Innovation fund, but there is little affordable space to innovate, launch appLAB – a building provide low rent space for firms creating software applications (apps), games, etc. a real innovation laboratory for Hong Kong residents. Firms surely face common problems, whether it is business administration, HR, accounting, finance, etc. collaboration areas help and allow sharing ideas and finding solutions to common problems.
Schools are often located far from the CBD, and community space is rare, these building can be used with little alteration for yoga, dance, creating a truly community space for drama, the arts, these are necessary.
If a building has been abandoned for so long that it needs repair use it as training ground ground have CITA trainees, giving them real world experience.
These would be short term plans, no long leases, this does not need to be lifetime commitment, these existing buildings can be used today! and contribute to society and sustainability, over the short term, because Government will need time to figure out how to deal the land over the long term. Of course, Government being government they will immediately say No, I can imagine the countless excuses, but they might, just might, say Yes.