Photovoltaic Tree

The concept of PV Tree is same as BIPV system but the PV panels are installed on artificial trees. The appearance of the PV system can integrate with the design of Piazza. The PV trees can also be used as lighting system with electricity generated by PV panels installed at the top of the PV tree to reduce the electricity consumption of post lamps in Piazza.

Building-Integrated Photovoltaic System

BIPV Panels integrated in canopy. The BIPV panels convert the solar energy to direct current electricity and then through power inverters converting into alternative current for electrical appliance’s use in Headquarters.

Artificial Timber

Made with wood by products, plastic chips or shreds, resin, adhesive, wood chips and sawdust. More stable to atmospheric changes as compared to timber.

CSD Wall Tiles

These recycled glass tiles containing glass bottles aggregates area made by persons in custody of Tai Lam Correctional Institution.

Hydroponic Garden

Solar Hydroponic Planting Use renewable energy to generate electric drive system. Use deep-water planting methods to grow plants to save more than 90% of water. Use overhead planting to facilitate the use of the elderly and the disabled and reduce the impact of pests on plants. The system adopts double-layer water pipe design to reduce the influence of high temperature on water temperature.

Hydro-Turbine System

A hydro-turbine installed at waterfall. The water fall onto a waterwheel to drive the micro-generator reclaiming the potential energy to generate electricity. The micro hydro-turbine recovers the potential energy from the waterfall circulation system and regenerate power to partially support the system. The hydro-turbine makes the waterfall more environmental-friendly by recovering the wasted energy.

Vertical Green Walls

Vertical greening is the latest greening design of EMSD, and is located at the piazza of our Headquarters.

Vertical greening is a combined concept of traditional landscape design and roof garden system applying on the wall. As a demonstration on promoting green buildings by the government, it effectively utilizes spaces to improve greening ratio, and brings nature back to urban areas.

Solar-wind Lamp Poles and Solar Lamp Poles

Solar-wind lamp poles and solar lamp poles are located at the outdoor areas of the EMSD Headquarters.

The associated monocrystalline photovoltaic (PV) panels generate electricity from sunlight during daytime; whereas the associated rotor, depending on wind strength, directly drives the generator to produce electricity. The electricity generated would be stored in battery for supplying the lighting power at night.

Shading Device

The metal shading devices outside windows of the 1st to the 5th floors help maintain the indoor temperature by minimizing heat and direct sunlight penetrating into the main building. This saves energy by requiring less air conditioning to keep to the room temperature.

Double Glazing Windows

Double glazing windows have been widely adopted in office area of the 6th and the 7th floors. The air space between the two panes of glass is a return path for cool air that lowers the surface temperature of the glazing, thus reducing the amount of energy consumed by the air-conditioning system.

Concentrated Photovoltaics (CPV)

Using concave mirrors, a CPV concentrates large amount of sunlight by approximately 500 times onto high performance triple-junctions photovoltaic (PV) cells of 1 cm2 each to generate 1 kW of electricity with an efficiency of 25%, which is two times the efficiency of traditional monocrystalline PV cells.

The equipped two-axis sun tracker rotates the PV panel to maximize its exposure to solar irradiation thus increasing the electrical energy yield.

Solar Water Heating System

Solar water heating system is located at the roof of the vehicle office building. The system preheats incoming water for hot water supply of the shower facilities in the workshops and canteen of the EMSD Headquarters.

It has a capacity of 18 kW, saving 25,000 kWh electricity per annum, allowing hot water shower supply for around 40 persons.