Shing Mun Valley Swimming Pool Complex

1. Photo Gallery

(The photos were taken at a technical visit to the complex on 8 October 1998. Thanks are expressed to the students of Bachelor of Arts in Architectural Studies Year 3 (1998/99) at HKU for some of the photo contributions.)

1.1 Exterior of the Complex

shgmun01.jpg 80.65 Kb	shgmun02.jpg 64.01 Kb	shgmun03.jpg 59.85 Kb	shgmun04.jpg 47.52 Kb	shgmun05.jpg 71.41 Kb	shgmun06.jpg 56.46 Kb
shgmun07.jpg 81.36 Kb	shgmun08.jpg 47.76 Kb	shgmun33.jpg 110.14 Kb (outdoor leisure pool)	shgmun34.jpg 107.74 Kb (outdoor leisure pool)

top>>

1.2 Glass Wall (Facing South)

shgmun09.jpg
60.13 Kb

shgmun09a.jpg
362.61 Kb

shgmun09b.jpg
320.59 Kb

shgmun09c.jpg
376.33 Kb

shgmun09d.jpg
59.76 Kb

top>>

1.3 Indoor Pool Area

shgmun10.jpg 116.96 Kb	shgmun11.jpg 123.04 Kb	shgmun12.jpg 91.65 Kb	shgmun12a.jpg 431.06 Kb	shgmun12b.jpg 430.91 Kb	shgmun12c.jpg 416.67 Kb
shgmun12d.jpg 480.38 Kb	shgmun13.jpg 87.21 Kb	shgmun14.jpg 107.50 Kb	shgmun15.jpg 112.90 Kb	shgmun16.jpg 83.94 Kb	shgmun17.jpg 80.25 Kb (pool divider)
shgmun18.jpg 68.51 Kb (movable floor)

top>>

1.4 Space Frame and Services

shgmun19.jpg 67.71 Kb	shgmun20.jpg 78.78 Kb	shgmun20a.jpg 390.81 Kb	shgmun20b.jpg 357.57 Kb	shgmun20c.jpg 380.71 Kb	shgmun21.jpg 64.18 Kb
shgmun21a.jpg 404.24 Kb	shgmun21b.jpg 358.33 Kb	shgmun21c.jpg 381.09 Kb

top>>

1.5 Catwalk and Air-conditioning/Ventilation Equipment

shgmun22.jpg 70.00 Kb	shgmun22a.jpg 391.79 Kb	shgmun22b.jpg 351.59 Kb	shgmun22c.jpg 378.02 Kb	shgmun22d.jpg 434.31 Kb	shgmun23.jpg 78.22 Kb
shgmun24.jpg 69.55 Kb	shgmun25.jpg 60.10 Kb	shgmun26.jpg 75.30 Kb	shgmun27.jpg 37.53 Kb	shgmun28.jpg 45.96 Kb

top>>

1.6 Solar Panels and Filtration Plant

shgmun29.jpg
79.97 Kb
(solar panel)

shgmun30.jpg
52.28 Kb
(solar panel)

shgmun31.jpg
85.65 Kb

shgmun32.jpg
65.44 Kb

shgmun35.jpg
90.14 Kb
(group photo)

top>>

2. Design Summary

(A PDF file of the design summary is available here. Sincere thanks are expressed to Mr. S. L. Lau and Mr. R. Kan of the Architectural Services Department for providing the technical information.)

2.1 Swimming Pool Complex

Two separate buildings of five storeys with a GFA of 12,000 sq.m plus three swimming pools namely:

(a) Indoor Heated Pool

Standard+diving pool to FINA competition standard
mechanical movable floor + pool divider (Submersible Boom)
pool depth varies from 2m to 5.6m
1000 seat spectator stand + a curved roofing integrated with E&M services design

(b) Outdoor Leisure Pool

training pool + children paddling pool

(c) Teaching Pool

Contract period :
1) Construction commenced in Nov.,94 and re-entry in April, 97
2) Completion contract resumed in Sept., 97 and project substantially completed in October, 98

top>>

2.2 Filtration Plants

Filtration plant located at the basement with an area of 2,900 sq.m approximately with an extended pipe tunnel surrounding the main pool. Each of the three pools are served with independent filtration system which includes the following process.

(a) Process

Sand Filter
Primary Disinfection - Ozonator .
Reaction Tanks (2 min.) .
Deozonisation (Carbon filter - 1.5 min.)
Secondary Disinfection - Sodium Hypochlorite (NaOCl)/Residual free chlorine 0.6ppm(0.55-0.65) --> 1ppm w/o O₃
Acid Dosing - pH control 7.3 (range 7.2-7.4)
Heat exchangers (For main pool only)

(b) Main equipment/key parameters:

	Main Pool	Leisure Pool	Teaching Pool	Remarks
Pool Volume	4750 cu.m	900 cu.m	270 cu.m
Turnover Rate	4 hours	1.5 hours	2 hours
Circulation Rate	1188 cu.m/hr.	600 cu.m/hr.	135 cu.m/hr.
Circulation Pumps (cu.m/hr. x no.)	238 cu.m/hr. x 6	150 cu.m/hr. x 5	68 cu.m/hr. x 3
Sand filter	dia.2.5 x 8L x 5 19.8 m²	dia.2.5 x 6L x 4 12.5 m²	dia.2.3 x 2.3H x 2 5.7 m²	12-16 m/hr/filter area
Ozonator	690 g/hr x 2	410 g/hr x 2	130 g/hr x 2	1 ppm / 1.15 ppm (main pool) (max 1.2ppm)
Reaction Tank	dia.2.8 x 8L x 1 39.6 cu.m	dia.2.8 x 4.5L x 1 20 cu.m	dia.2.8 x 2H x 1 4.5 cu.m	R x Time = 2 min.
Carbon Filter	dia.2.8 x 9L x 2 18.8 cu.m	dia.2.8 x 5L x 2 9.9 cu.m	dia.2.8 x 2H x 2 4.5 cu.m	Absorption Time 1.5 min.
Air Compressor	1350 cu.m/hr. x 2	750 cu.m/hr. x 2	345 cu.m/hr. x 2	Backwash: 50m/hr/filter area sand filter - 7 min. carbon filter - 5 min
NaOCl Generator	Chlorine production Rate 5 kg/hr x 2

top>>

2.3 Electrical

(a) Rating of Main & Submain System :

Transformer	: 1500 kVA x 2 nos.
Standby Generator	: 250 kVA
General Lighting & Power	: 400 kVA
HVAC	: 1000 kVA
Filtration Plant & Hot Water Boiler	: 1250 kVA

(b) Other Electrical/Electronic Installation :

Scoreboard

Timing System

Underwater Sound System

Electric window and blind

top>>

2.4 HVAC

(a) Capacity of Various Plants

Chillers	355 kW x 2	-->	(1) 710 kW	(1) cooling capacity =1250 kW
Chillers (heat recovery)	180 kW x 3	-->	(1) 540 kW	(1) cooling capacity =1250 kW
Heat Pumps	213 kW x 3 = 640 kW	-->	(2) 440 kW	(2) Space Heating = 440 kW
		-->	(3) 200 kW	(3) Pool Heating = 800 kW + 330 m²
Solar Panels	2 m² x 168 nos.	-->	total area : 330 m²
Electric Boilers	300 kW x 2	-->	(3) 600 kW

(b) Brief Description on Heating and A/C systems

Refrigeration plants with 2 air cooled chillers and 3 heat recovery chillers located at the roof floor of the outdoor pool building.
All solar panels placed on a special suspended steel frame structure with an area of 14 m x 48 m approximately at the indoor pool building.
Other equipment associated with the solar system, electric boiler and the heat exchangers located in the basement plant room.
The indoor swimming pool together with the spectator stand during competition events in summer attributes to the major cooling load demand of the refrigeration plant (chillers + heat pumps) among the other area in the indoor pool & outdoor pool complex. At the same time, reheat at air handling units (provided by heat pumps) are always required for dehumidification of swimming pool hall so as to prevent condensation on glazing/mullions and to maintain a comfort condition for the swimmers.
In winter time, the indoor pool will still be opened for the public. The pool water temperature would be maintained at a range of 26° C to 28° C via the three heat exchangers at the discretion of the operator.
There are three sources for pool heating ; namely, (a) Electric Boilers ; (b) Solar Panels ; and (c) The surplus recovered by the heat pumps after the demand on space heating is satisfied.
The pool temperature is basically maintained by solar panels and heat pumps only in the normal operation whereas the electric boilers act as booster during the initial stage of operation and act as standby provision to the heat pumps and solar panel as well.

top>>

2.5 Mechanical Movable Floor & Pool Divider

Operates on Archimedes’ principle - A body submerged in fluid, exerts a upward force = weight of fluid being displaced.
Moved down by means of tensioned stainless steel cables, running through pulleys at pool bottom/pool deck to hydraulic actuators at pipe tunnel.
Submersible boom - two separated sections for recreational/diving activities
Submersible boom - stainless steel frame + GRP outer skin + buoyancy secured by PU foam block in GRP laminate / access via. removable grill by certified divers.
lane rope 3 kN to 5 kN
Tandem floor - Bearing capacity 65kg/m², about 540 adults/half pool (25m x 25m)
Tandem floor - roller guide, two boom sections, extremities raised approx. 1m above water for cleaning.

top>>

| Case Study Index |

| Created: 18 Jan 99 | Update: 15 Nov 99 | Author: Sam C M Hui (cmhui@hku.hk) |