Building Services Engineering 5th Edition Handbook

6 Hot- and cold-water
supplies
Learning objectives
Study of this chapter will enable the reader to:
1. recognize the quality of water supplied to buildings;
2. explain pH value;
3. explain water hardness;
4. identify and apply appropriate water treatment methods;
5. decide appropriate applications for mains pressure and storage tank cold- and hotwater
systems;
6. understand pressure-boosted systems for tall buildings;
7. apply economic instantaneous and storage techniques for hot-water provision;
8. understand primary and secondary pipe circulation systems;
9. calculate the heater power for hot-water devices;
10. understand demand units;
11. understand how cold- and hot-water pipe systems are designed;
12. be capable of carrying out basic cold- and hot-water pipe-sizing calculations;
13. understand pipe equivalent length;
14. understand pipe pressure loss calculation;
15. use CIBSE pipe-sizing data;
16. allocate sanitary appliances appropriate to building usage;
17. discuss the use of pipe materials and their methods of jointing;
18. have a basic understanding of how solar energy can be utilized in the provision of hot
water in buildings.
Key terms and concepts
acidic and alkaline water 179; base exchange 180; centralized hot-water system 183;
concentrating solar collector 198; corrosion 179; decentralized hot-water system 184; delayedaction
ball valve 183; demand units 187; demineralization 180; dezincification 179; direct
mains water 181; electrolytic action 195; equivalent length 188; flat-plate solar collector