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Heating Systems HVAC 11a CNST 305 Environmental Systems 1 Dr. Berryman 11aHeating Systems; Fuels; Boilers; Furnaces; Hydronics, Radiant Heat Chapter 5.

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Presentation on theme: "Heating Systems HVAC 11a CNST 305 Environmental Systems 1 Dr. Berryman 11aHeating Systems; Fuels; Boilers; Furnaces; Hydronics, Radiant Heat Chapter 5."— Presentation transcript:

1 Heating Systems HVAC 11a CNST 305 Environmental Systems 1 Dr. Berryman 11aHeating Systems; Fuels; Boilers; Furnaces; Hydronics, Radiant Heat Chapter 5 (Toa)

2 Types of Heating Systems

3 Energy Sources

4 Circulating Air Systems Heat distributed by an air stream through a heating unit to supply ducts duct< 200 Must make good cost projections to assure an economical selection

5 Simple Basics

6 Heating Units - Air Split System - w/ Gas Furnace upflow downflow horizontal

7 Heating Units (cont.) Single Package w/ electric heating

8 Water Systems Heat is distributed by a pumped water system though a heating unit to supply piping boiler on cooling tower off Different piping arrangements are used – Hydronic Piping

9 Boilers Water Tube – Low Fire Box Gasses pass around tubes Responds quickly to load fluctuations. Types range from small (residential) to large (commercial)

10 Water Tube – High Fire Box Boilers (cont.)

11 Piping Configurations Series Loop One Pipe Two Pipe Three Pipe Four Pipe One pipe system

12 Series Loop Maintenance or repair requires shutdown Temp control at each unit impossible # units limited Only heating or cooling

13 One Pipe System Allows for each unit to be controlled Limited # of units that can be serviced Needs special fittings Only heating or cooling Diverting Tee

14 Two Pipe – Reverse Return Each unit fed by individual supply branch Each unit can be controlled Flow rates are balanced (heat or cool only)

15 Three Pipe System Similar to two pipe systems Allows for simultaneous heating and cooling Mixed return Prohibited by some energy codes

16 Four Pipe System It is actually 2- two pipe systems Allows for simultaneous heating and cooling Separate water return for heating and cooling Most efficient Most expensive – initial cost

17 Steam Expands 1000 its original state Creates its own transport system No pumps Piping configurations same for water – only at low pressures Operating temps 220 – 250 o F About 15 pisg High Pressures (60 – 350 psig) Use heat exchanges Need steam traps

18 Steam to Water Heat Exchanger Circulating pump Steam in tube Water in tube

19 Radiant Systems Fin-tube radiator Iron Sectional

20 Next Time Basics of Air Conditioning 12Cooling Systems; Refrigerants; Condenser/Evaporator Compressive; Absorption; Evaporative; Chillers; Heat Sinks Chapter 4 (Toa)


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