Czech Technical University in Prague Faculty of Civil Engineering Department of Microenvironmental and Building Services Engineering Czech Technical University.

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Presentation transcript:

Czech Technical University in Prague Faculty of Civil Engineering Department of Microenvironmental and Building Services Engineering Czech Technical University in Prague Faculty of Civil Engineering Department of Microenvironmental and Building Services Engineering Building Services Systems 20 Lecture 4 Heat emmitters Lecture 4 Heat emmitters

Heat emitters

Convectors Natural Fan-convectors Floor Wall

Radiators

Off-peak storage Static Static Dynamic Dynamic Convector Convector Radiator Radiator

Heat emitters Design principles Design principles Heating output Heating output Location Location Covering - furniture Covering - furniture Connection to the pipe system Connection to the pipe system Type Type

Heater emitters design Covering = changes in the output Covering = changes in the output 100%87%110%95% 100% 90%85% l Connection to the piping system

Low - temperature radiant heating floor, wall and/or ceiling with embedded pipes or el.wires in concrete slab floor, wall and/or ceiling with embedded pipes or el.wires in concrete slab Temperature distribution Temperature distribution

Underfloor heating History

Low - temperature radiant heating Floor structure Floor structure Insulating strip between wall and flooring Finished flooring Concrete slab min 65mm Thermal insulation 20-80mm Pipes Humidity seal Reinforcement Supporting floor structure

Underfloor heating - structure TYP A TYP B TYP C

Low - temperature radiant heating Technical solution Technical solution Pipe layout Pipe layout

Low - temperature radiant heating Output Output Limited surface temperature  limited output cca 100 W.m -2 Limited surface temperature  limited output cca 100 W.m -2 Energy savings Energy savings Lower air temperature  lower heat losses Lower air temperature  lower heat losses Control Control Low temperature difference  autocontrol effect Low temperature difference  autocontrol effect

Underfloor heating - examples

Radiant panels Low temperature Low temperature heaters max 110 °C (water, steam, el.power) heaters max 110 °C (water, steam, el.power) High temperature High temperature dark - about 350°C - radiant tube heating system (gas) dark - about 350°C - radiant tube heating system (gas) light - about 800 °C - flameless surface gas combustion light - about 800 °C - flameless surface gas combustion

Czech Technical University in Prague Faculty of Civil Engineering Department of Microenvironmental and Building Services Engineering Czech Technical University in Prague Faculty of Civil Engineering Department of Microenvironmental and Building Services Engineering