Speaker: K. P. Cheung, Associate Professor, Department of Architecture, HKU

Speaker: K. P. Cheung, Associate Professor, Department of Architecture, HKU

http://www.arch.hku.hk/~kpcheung/index.html

Research team:

Cheung, K. P.Luk, C. L.Wong, S. T.Hui, Sam C. M.Chung, S. L.Fung, K. S.Leung, M. F.

THE S3P2E4R4 SUSTAINABLE BIREATH APPROACH: Building Integrated Renewable Energies and resources, optimized AIR quality- Total Harvest APPROACH for buildings, communities, cities

The Sustainable S3P2E4R4 BIREATH Approach

BIREATH Building Integrated Renewable resources and Energy, optimized Air quality, Total Harvest

S3Environmental and ecological sustainabilityEconomical sustainabilityCultural sustainability

P2Pollution Prevention

E4Energy EfficientWater EfficientMaterial EfficientLand Efficient

R4Reduce Reuse Recycle Recover [or Regenerate]

The Sustainable S3P2E4R4 BIREATH/ CIREATH/ UIREATH Approach

BIREATH Building Integrated Renewable resources and Energy, optimized Air quality, Total Harvest

CIREATH City Integrated Renewable resources and Energy, optimized Air quality, Total Harvest

UIREATH Urban Integrated Renewable resources and Energy, optimized Air quality, Total Harvest

Priority:

Safety, Health, Sustainability, Comfort – an obligation to take a positive response to climatic change as a directive for human activities

including building design, city design, urban design, village design, etc..

– the Sustainable S3P2E4R4 BIREATH approach to building design matches this directive

Application of the Sustainable S3P2E4R4 BIREATH Approach inbuilding design in enhancing an existing high-rise residential unit in HK

Aims at:

- significantly reducing consumption of operating energy and water

- harvesting as much solar & wind energy as possible

- for providing food, hot water & optimized air quality for the residents

Basic data of the residential unit:

- generally North facing

- approx. 11 sq.m. UFA + 14 sq.m. flat roof area

- location: Sai Ying Pun (NW part of HK Island)



original condition

20/F plan

21/F

20/F


intended use

- a studio flat

- an experimental & demonstration flat for investigating the principles & application of the

Sustainable S3P2E4R4 BIREATH Approach

300mm raised floor modules

Modular wooden raised floor deck panels

20/F plan 21/F plan


Harvesting solar energy by:

a. solar hot water panel / solar PV panel, small wind turbine, big Fresnel lens of 1.2m

diameter for solar oven

b. 2 layers of green plants at flat roof / balcony:

i. top layer - fast organic growing offood plants e.g. melons & fastgrowing vegetables in hot summer

forfood, which will reduce

transportation offood & farmland demand

ii. lower layer of grass - grows well inless sunshine, to harvest residualsunshine & daylight

a

b

b


Harvesting solar energy by:

c. growing of plants of herbal & health value for improving AIR quality, so that closing up

the façade & operating the A/C, rejecting the optimized AIR quality, will surely be a regretful loss.

d. performing TOTAL HARVEST of solar energy by maximizing the surface areas of the façade for growing plants, & intake of daylight by increasing glazed surface & skylight, yet without overheating the interior.

e. solar air chimneyf. sunlight reflecting system by ventilation tube

[ Converting CO2 into solid C stored inside food ]

e/f

dc


b. providing “true cross ventilation” i.e. each room will have 2 air passages independently connected to outside surface of the flat

c. wind turbine

[ No A/C will be required - electrical fans to be provided ]

a

a

Harvesting wind energy by:

a. enlarging the openable areas of the façade, and adding a skylight, which will allow a staircase to connect the studio flat & the roof above.

b


P2 Pollution Prevention:

Gas supply is terminated – no local emission of pollution of combustion gases

E4 1. Energy Efficiency – and to REDUCE energy use

a. No A/C will be required – electrical fans will be provided

b. Heat pump is used for hot water generation if solar hot water is not sufficient, especially in winter days when the roof cannot receive sunshine. Cold air from heat pump will give spot cooling to people.

c. Light emitting diodes will be used for illumination as far as practicable

d. Use of energy efficient electrical appliances such as electrical induction cookers


E4 2. Water Efficiency – and to REDUCE water and energy use

a. Grey water for watering plants, biodegradable soap used

b. Rain water is collected for cleansing and watering plants

E4 3. Material Efficiency – cost effective and reusable, multi-purpose components to be used in renovation

E4 4. Land Efficiency – The roof will form part of the lower floor after renovation, regenerating the roof for more frequent use, achieving land efficiency

RECOVER of space in the flat by installing a raised floor with the floor void for storage & for ventilation & installation of building services


Other features:

a. Harvesting rain by collecting rain for growing plants

b. Flexible interior spatial organization, allowing good day light transmission as desirable & true cross ventilation

c. RECYCLE - collection of grey water for growing plants (subject to filtering) & flushing toilet

a

a

Reasonable initial & running cost, certainly good for living with environmental contribution, hence

S3 - Environmental & ecological, Economical, Cultural Sustainability

a

a

To achieve an energy-efficient , cost-effective attainment of excellent performance-based Indoor Air Quality, we need to know these data around the building envelope:

-Ambient Air Quality [AAQ] surrounding our buildings at strategic points, measured at air inlet chamberVelocity at top of building above the eddy air zonePressures on outside of air inlet and exhaust louvres -Temperature and humidity of air at inlet Indoor Air Quality of exhaust air at exhaust louvres, including temperature and humidity - Wind and air velocity at other openings such ground level opened doors

We need to take the advantage of air quality at certain hours of the day, and wind direction for good air quality. We also need to use wind energy to help intake and exhaust air, for attaining energy efficient ventilation and air conditioning.

a

a

To achieve an energy-efficient , cost-effective attainment of excellent performance-based Indoor Air Quality, we need to know these data at strategic locations inside the building :

-IAQ Profile-air pressure values at desirable durations -air velocity at desirable durations -air flow rates at desirable durations

The data of ambient air quality and wind, temperature, and humidity will be supplied to the computerized building air conditioning and energy control system to control and adjust the equipment and systems to attain the desired indoor air quality and temperature and humidity control with the least possible amount of energy.

The wind/temperature/humidity measuring equipment is installed locally at the top of the site to obtain data for analysis and controlling of HVAC and energy systems in buildings.

a

a

Wind speed obtained locally at the top of the site to obtain data for analysis and controlling of HVAC and energy systems in buildings.

a

a

Wind speed

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The 7th International Energy Agency Annex 44 Forum - Integrating Environmentally Responsive Elements in Buildings The Sustainable S3P2E2R4 BIREATH Approach

Real-time Multipoint IAQ Monitoring systemsReal-time Multipoint IAQ Monitoring systems

• Continuous IAQ monitors that are capable of measuring several IAQ parameters simultaneously

• Can show precise changes in air quality in several locations

• Under the control of a single PC

• Specialist software that enables end-user to schedule monitoring, set alarm levels and generate graphs and reports from stored data

pplication of the Sustainable S3P2E4R4 BIREATH Approach inbuilding design in enhancing an existing high-rise residential unit in HK

Other features:

a. Harvesting rain by collecting rain for growing plants

b. Flexible interior spatial organization, allowing good day light transmission as desirable & true cross ventilation

c. RECYCLE - collection of grey water for growing plants (subject to filtering) & flushing toilet

a

a

Thank you


The equipment to continuously monitor IAQ and AAQ, and to feed signals to computer for controlling components for achieving optimized IAQ with the best energy efficient approach

The 7th International Energy Agency Annex 44 Forum - Integrating Environmentally Responsive Elements in Buildings The Sustainable S3P2E2R4 BIREATH Approach

Thank you very much

Speaker: K. P. Cheung, Associate Professor, Department of Architecture, HKU

http://www.arch.hku.hk/~kpcheung/index.html

Research team:


THE S3P2E4R4 SUSTAINABLE BIREATH APPROACH: Building Integrated Renewable Energies and resources, optimized AIR quality- Total Harvest APPROACH for buildings, communities, cities

Documents

Speaker: K. P. Cheung, Associate Professor, Department of Architecture, HKU