Radiant Heating


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Description District heating transports the heat generated in a centralized location via a pre-insulated pipework to residential, public and commercial buildings for their heating. Usually water is used to transport the heat, but also steam is possible. A heat exchanger connects the heat network with the central heating of the building. There are also district cooling systems working on the same principles. On average, over 80 per cent of heat supplied by district heating originates from renewable energy sources or heat recovery. The main idea behind modern district heating is to capture the surplus heat from energy generation or industrial processes and to recycle this otherwise wasted heat.
Advantages
  • Can be combined with renewable energy sources
  • Drastically reduces energy consumption
Disadvantages
  • Some heat loss during transportation; particularly for district heating systems using steam
  • High initial investment cost
  • Heat is less portable than energy: The operator is inclined to incentivise users to use as much heat as possible, decouraging investment in insulating poorly insulated buildings
Characteristic features
Application barriers

High initial investment cost

Information sources http://euroheat.org/
http://solar-district-heating.eu/
http://cogeneurope.eu/district-heating_270.html
http://geodh.eu/about-geothermal-district-heating/
http://biomassenergycentre.org.uk/portal/page?_pageid=77,97356&_dad=portal&_schema=PORTAL
Image
Trade: Building services
Parameter Minimal Value Maximal Value Unit
Material

Polyethylene

Moisture Barrier

N

N

Thickness of Mortar

15

40

mm

Diameter

9

20

mm

Water Volume

0,064

0,314

l/m

Thermal Gradient Heating

10

23

°C

Thermal Gradient Cooling

7

15

°C

Thermal Conductivity

0,4

0.5

W/mK

Separation Between Pipes

50

300

mm

Covered Surface

N/A

°C

Peripheral Zone

?

?

°C

Heating Capacity

35 W/m2

100 W/m2

kW

Dimensions

15

50

mm

Weight

1.5 kg/m2

70 kg/m2

kg

Investment Cost

5 €/m2

20 €/m2

Operational Cost

0.3 €/m2year

3 €/m2year

€/year

Replacement Cost

0

4 €/m2year

€/year

Life Expectancy

15

35

years

Deterioration Description
Causes
Parameter
Degradation Rate
Measurement


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