Energy for tomorrow : division 2 energy and the environment = Energie demain. Positive effect of district heating on the environment. World Energy Conference [14, 17-22 Sep. 1989, Montreal].

Stalebrant, Rolf E. ...[et al.].

1989

CIENA
525

Because district heating production units and distribution systems are more efficient, and frequently much more efficient, than separate boilers in each building, overall energy requirements are reduced when district heating systems are installed. District heating also allows the introduction of combined heat and power production. Compared to separate systems for production of heat and electricity, fuel requirements and the subsequent emission of pollutants are reduced. There are several reasons why expansion of district heating netwoks reduces pollution. Fuel demand is lower than for individual boilers. Devices for cleaning exhaust gases, or other methods, lessen the environmental impact. High chimneys allow better dilution of the exhaust gases. The beneficial effect on the environment following expansion of district heating systems has been shown in a number of cities in which emissions and concentration of air-pollutants have been monitored. The concentrations of SO2 were reduced to harmless levels. For NOx, traffic is now the dominant source. Computer models have been developed to allow calculation of pollution concentrations for future alternative heating supply systems in cities. Originally, dust and sulphur were the main factors of ecological concern. The oxides of nitrogen have also featured in political and public debate. More recently mercury and heavy metals have been identified as environmental pollutants. Pollution with sulphur and nitrogen from Swedish sources only, could in many places be at an ecologically acceptably low level. However, when non-Swedish sources are added, pollution still represents a problem in many parts of Sweden....Ver documento. THE POSITIVE EFFECT OF DISTRICT HEATING ON THE ENVIRONMENT. Why District Heating?. Cogeneration. District Heating and the Environment. Concentration of Air-Pollutants. Non Domestic Sources. How to Reduce Pollutants. ABSTRACT.

Presenta tbls.

GENERAL; CALEFACCION; IMPACTO AMBIENTAL; CONTAMINACION ATMOSFERICA; COGENERACION;