103
14
catalogue results then the Kaiping coal should have an efficiency of about 32 lbs. of gained distilled water to 1 lb. of coal burnt.
The present contract price of these fuels supplied to the Government ex Contractor's Depot in Hong Kong is as follows :-
Coal from $11.20 to $13.20 per ton.
Fuel Oil $35.00 per ton.
Carriage of these fuels from Contractor's Depot to site of Plant would be extra.
The difference in cost between these fuels, even if the cost of carriage is added and the question of handling is taken into account, is so marked that coal would be the cheaper fuel to use in Hong Kong even if its calorific value is low.
The following is an estimate for installing two sets of Sextuple Effect Plant capable of producing 800 tons or 179,200 gallons of water per day of 24 hours which I consider will give the most economical result :—
Land 20,000 sq. feet @ say $2 a sq. ft.
Distilling and Condensing Plant delivered and erected on site in
Hong Kong
$ 40,000
Pumps and piping for lifting water to service tank for distribution Buildings for Distilling and Condensing Plant, Pumps, stores
and staff (exclusive of foundations)
400,000 85,000
150,000
TOTAL
$675,000
The cost to run and maintain the Buildings and Plant per month is estimated as follows:-
Wages
Stores etc. including electric power to pump
Coal 750 tons @ $15 per ton including carriage Depreciation on Buildings and Plant say
$ 1,000
1,000 11,250
2.270
$15,520
TOTAL
15
Outline and Particulars on the Possibilities of Installing a Salt water Flushing Scheme for the City of Victoria Hong Kong by Edward Newhouse, Drainage Engineer, Public Works Department, Hong Kong, 3rd February, 1927.
1. Population. The figures for the estimated distribution of population, based on the 1921 census returns which were obtained from the old health districts, are as follows:-
District rast of
Guricno.
District west of Garden Road.
ESTIMATED POPULATION IN LOW LEVEL SALT WATER FLUSH ZONE.
(North Point
District No. 1
Population 1921 Census.
Total:
District.
Ad for increase in
population 50%
Acil for Reclamatio is
when built on
15 000
North Point
and Tai
Total
Less population in Viddle
Level Zone to be served by
Fresh water supply.
Total population to be
supplied.
3.112
17.386
Causeway Bay Bowring.
Haug.
ton and Wongneichong
District No In & 2a
Wan hai.
20 553
District No, 2
27.211
74.262
37,131
35,000
161.393
6,000
155 393
| Wanchai.
Praya East.
( District No. 3.
15,026
Upper Lovels.
District No. 4 entral.
43.63%
District No 5..
Central.
20.471
District No. 8......
28.029 |
Sheungwan and Taiping-
shau.
District No. 7.
28.100
Sheungwan and Taiping.
shan.
District No, S
26.647
Saiyingpun-North of
Government Civil Hospital.
Diste et 9... Saigingen. District No. 10 West Pinc.
42.820
27 683 241,212 · 120,606
Kennedy Town 8,000
360,818
17.500
$52,318
=
5,376,000 gallons.
Amount of water pumped in one month of 30 days Approximate cost per 1,000 gallons of distilled water = $2.89.
The approximate cost per 1,000 gallons of delivering filtered water to consumers in this Colony under present conditions of supply is as follows:-
Hong Kong Island (City of Victoria)
Kowloon
35 cents
22 cents
For the purposes of this estimate I have assumed that the Condensing and Distilling Plant will be situated to the west of Kennedy Town and that the distilled water will be pumped up to the existing Kennedy Town Service Tank, therefore no provision is made for a new service tank for distribution purposes in the estimate.
Until a site is definitely fixed, the estimated cost of foundations cannot be ascertain- ed, but I do not think the capital cost for the whole plant will exceed $725,000.
Some market might be found for the brine extracted from the sea water.
22nd February, 1927.
H. T. JACKMAN.
Assistant Director of Public Works.
SALT WATER SCHEME FOR LOW-LEVEL ZONE.
507.711
Total uplation
o be served by
salt water flush. Say $10,000.
2. Site of Destructors and Pumping Station :-The site shown on plan has been chosen chiefly on account of the desirability of having the destructors as far removed as possible from the densely populated parts of the City. It forms part of the scheme of reclamation referred to on page 40 in the report on the commercial development of the Port of Hong Kong by Mr. John Duncan dated the 12th December 1924 and entails the building of a deep sea wall and reclamation. It is desirable to keep the installation within harbour limits east of Sulphur Channel, as the removal of refuse to this point is less likely to be affected by typhoons and adverse weather. The destructors are shown on part of the site nearest the harbour front to allow of rapid and cheap handling of refuse by water transport. It would probably be found economical for all refuse east of Western Market to be water-borne. From experience gained of the working of Destructor plants in several towns in England during the years 1904-1910, I am strongly of the opinion that they can be successfully operated in Hong Kong, but whether they would or would not be a sound business proposition and a Sanitary improvement worth the cost as compared with the present method of refuse disposal at sea, and whether the power generated could be economically used for any large Government buildings and plants other than pumping for a salt water flush system, (and I am inclined to think it
104
No comments yet.
Private notes are available after approval.