B UILDING &
CONSTRUCTION
Building & Construction P u m p i n g e q u i p m e n t for C h e l s e a Village Pumping equipment supplied b y Pullen Pumps, UK, is playing a part in t h e p r o v i s i o n o f facilities for o n e o f L o n d o n ' s m o s t i m a g i n a t i v e s p o r t s a n d leisure c o m p l e x e s . O p e n e d earlier this year, t h e £ 3 5 m i l l i o n d e v e l o p ment undertaken by the publicly q u o t e d C h e l s e a Village Group, is Chelsea Football Club c h a i r m a n Ken Bates' v i s i o n to d e v e l o p t h e site into "the C o v e n t G a r d e n of S o u t h W e s t L o n d o n for the y e a r 2000". T h e n e w s o u t h e r n c o m p l e x n o t only c o m p r i s e s a 5000 seat, two-tier s t a n d b u t also i n c l u d e s a 160 b e d r o o m four star hotel, restaurants, offices, apartments, sports and leisure facilities and a galleria w i t h a full length v i e w of the pitch. Building s e r v i c e s for t h e c o m p l e x w e r e d e s i g n e d b y consultants, Fuller & Partners, Farnham, Surrey. Heating for the entire southe r n c o m p l e x is p r o v i d e d via three 1860 k W gas fired boilers l o c a t e d in a n e w p l a n t r o o m in t h e East Stand b a s e m e n t e a r park. T h e p r i m a r y f l o w h e a t i n g main from the boilers c o n n e c t s into a common flow header b e f o r e p a s s i n g o n to a d u p l e x Pullen, b e l t d r i v e n "C" t y p e p u m p set (duty 121 l/s at 95 kl~a), sized to a l l o w for a 25% f u t u r e increase in duty.
Chelsea Village Hotel, served with chilled water by Pullen Pumps. T a p p i n g s off t h e h e a t i n g main carry low-pressure hot w a t e r to t h e n e w South Stand, hotel, residential block and offices. The primary chilled water main passes from eight 3 0 O k W air c o o l e d w a t e r chillers on the r o o f of the South Stand to a seco n d d u p l e x Pullen, b e l t d r i v e n "C" t y p e p u m p set (duty 115 l/s at 120 kPa) f r o m w h e r e secondary flow and return loops serve the hotel bedroom and office four-pipe fan coil air-cond i t i o n i n g s y s t e m s a n d South Stand g a l l e r y air h a n d l i n g unit c o o l i n g coils. T h r e e o f t h e
chillers, fitted w i t h h e a t recove r y h e a t e x c h a n g e r s and superh e a t e r s , s u p p l y h o t w a t e r via p l a t e h e a t e x c h a n g e r a n d cond e n s e r w a t e r d u p l e x p u m p set (from a n o t h e r manufacturer) to the h o t e l DI-IW circuit. Overall e n v i r o n m e n t a l cond i t i o n s for t h e n e w s o u t h e r n c o m p l e x are c o n t r o l l e d via a large e x t e n s i o n to the stadium's existing Trend building managem e n t system.
Contact: Pullen Pumps Ltd., Beddington Lane, Croydon CR9 4PT, UK. Tel: +44 181 684 9521.
C o n c r e t e in a cold c l i m a t e Cold w e a t h e r c o n c r e t e p u m p ing c a n b e p r o f i t a b l e . W h e n m a n y c o n c r e t e p u m p e r s are p a c k i n g u p and shutting d o w n , o t h e r s are d e c i d i n g to seize wint e r o p p o r t u n i t i e s . T h e y have, f o u n d that w i n t e r p u m p i n g is a time to take on jobs at p r e m i u m p r i c e s w h i l e c o m p e t i t o r s are o u t of t h e loop. However, e a c h c o n t r a c t o r must d e c i d e w h e t h e r the added cost maintaining e q u i p m e n t and c o n c r e t e quality d u r i n g c o l d t e m p e r a t u r e s is a better investment than heading south for the winter.
W O R L D P U M P S N O V E M B E R 1998
A c c o r d i n g to t h e A m e r i c a n C o n c r e t e Institute (ACI), experie n c e has s h o w n that the overall costs of a d e q u a t e p r o t e c t i o n for cold w e a t h e r c o n c r e t i n g are n o t e x c e s s i v e , c o n s i d e r i n g w h a t is r e q u i r e d and the resulting benefits. N e g l e c t o f p r o t e c t i o n against early freezing can cause i m m e d i a t e d e s t r u c t i o n o r permanently weakened concrete. Therefore, a d e q u a t e p r o t e c t i o n from l o w t e m p e r a t u r e s , as w e l l as p r o p e r c u r i n g , is essential. Most importantly, it's critical to p l a n ahead. N e c e s s a r y e q u i p -
ment and materials should be r e a d y at t h e w o r k site b e f o r e c o l d w e a t h e r is likely to occur, n o t after c o n c r e t e has b e e n p l a c e d a n d its t e m p e r a t u r e begins to a p p r o a c h the freezing point. Contractors can learn from t h o s e u p n o r t h . For t h o s e w h o live, thrive and w o r k in a n A r c t i c climate, for e x a m p l e , t h e r e is m u c h p r e p a r a t i o n a n d little d e l i b e r a t i o n . W i t h long w i n t e r s and an e x t r e m e l y short s u m m e r season, c o l d w e a t h e r c o n c r e t i n g is a s i m p l e fact o f life. Close