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Civil engineering and public works
Hong Kong
Power company builds its own 720 MW station
THE entire design and construction of the Tsing Yi power station, Hong Kong, which will have an ultimate ca- pacity of 720 MW, is being undertaken by the staff of China Light and Power Co. Ltd. one of the partners in the joint venture developing the site.
China Light will also operate the station, on which civil construction is now 75 per cent. completed.
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The joint venture - The Peninsular Electric Power Company (Pepco) was incorporated in 1964 with an au- thorised share capital of HK$400,000,- 000. Equity capital is provided by China Light and Power Co. Ltd. (40 per cent) and Eastern Energy (60 per cent). The latter company is fully own- ed by Esso Standard Eastern Inc.
With such a huge capital Pepco is the largest industrial company in the colony. Its new power station project is located on the southern tip of Tsing Yi Island, off the coast of the New Territories west of Tsuen Wan.
The site occupies 3,400,000 sq. ft., of which about 2,300,000 sq. ft. or 68 per cent is reclaimed land. Prepara- tion of this site entailed cutting over 5,000,000 cu. yd. from the hills and filling reclamation. More than 1,600,- 000 cu.
yd. of rocks was removed with
extensive use of explosives.
The southern and part of the eastern extremities of the site are bounded by a 3,600 ft. long seawall made of precast concrete blocks of 18-20 tons in weight. Due to the presence of silt in layers of varying thicknesses of up to 60 ft., ap- proximately 700,000 cu. yd. had to be dredged prior to forming the rubble mound.
Dredging had to be extended down to a staggering depth of 100 ft. near the south-eastern boundary before suit- able soil was reached. Formation of the rubble mound absorbed almost 800,000 cu. yd. of rocks.
It is estimated that the cost of land and seabed, plus site formation and reclamation, will amount to about HK$10.5 per sq. ft.
No pollution problems
The site for the new power station was chosen after careful study and in- vestigation. It is well situated near the future load concentration. It is not af fected by the Airport (Control of Ob- structions) Ordinance allowing tall chimneys and eliminating pollution problems, and it is fronting the deep water needed for cooling purposes.
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The station is initially designed for six 120 MW units with a provision for a future extension of six 300 MW
units. An area of 1,100,000 sq. ft. is earmarked as a tank farm to ensure continuity of fuel oil supplies.
Two 120 MW turbines have been or- dered from Associated Electrical Indus tries Ltd., Manchester, UK, and two 840,000 lb. boilers from International Combustion (Export) Ltd., Derby, UK. Both units are of a reheat type with working conditions of 1,800 lb. pres- sure and 1,000 deg. F. temperature. The first is scheduled for commission- ing in the spring of 1969; the second should be ready in the autumn.
Considerable savings in capital costs have been achieved by erecting the buildings and other heavy underground structures for all six units that will ultimately comprise the "A" station.
The power station is 576 ft. in length and consists of a turbine room, 120 ft. wide and 79 ft. high, a boiler house, 73 ft. wide and 140 ft. high, and a pump bay situated between tur- bine room and the boiler house and measuring 41 ft. wide and 126 ft. high.
A 132 KV switchhouse, housing 22 circuit breakers is positioned south of the turbine room. Its ground floor is occupied by the generator transfor- mers unit and station transformers to- gether with water cooled auxiliaries and its upper two floors contain the
Far East BUILDER, October 1968.
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