the goal of this research is the derivation of method for evaluation of efficiency improvement potential for district heating systems with focus on variable speed centrifugal pump. the effectiveness of the usage of the proportional pressure control is compared with the constant pressure control. this is why, energy calculation analyses have been realized for variable speed centrifugal pumps, an...

An urban district heating network represents an energy efficient way to supply the cities heat demand. The extension of district heating and the increase of it’s share in heat supply allows replacing ecological inefficient heating technologies. The economic feasibility of the extension and expansion and the operation of a local district heating network is a major issue. Hence the investment dec...

The growth of the Chinese district heating sector has been very rapid during recent years. No other country in the world can show the same rapid growth of district heating systems during the last decades. Heated building area increased six times between 1995 and 2008 according to the Chinese district heating statistics. China has also enjoyed strong growth of scientific articles and papers publ...

This paper is published by Euroheat & Power. Our aim is to inform about district heating and cooling as efficient and environmentally benign energy solutions that make use of resources that otherwise would be wasted, delivering reliable and comfortable heating and cooling in return.

The trend in the district heating industry is toward increased privatization and openness to competition, which bring with them other phenomena associated with civil law, such as bankruptcies. Vingåker was one of six Swedish municipalities whose district heating companies went bankrupt in 2004. The bankruptcy caused major disruptions in Vingåker, not least as a result of the unregulated legal f...

The concept of exergy is defined and applied to district heating systems. The influence from different reference state conditions and system boundaries are explained in some detail. The aim is to show the simplicity and value of using the concept of exergy when analyzing district heating processes. The exergy factor is introduced and applied for a number of Swedish and Danish district heating s...

The aim of this study was to analyse the possibilities of converting industrial processes from electricity and fossil fuels to district heating in 83 companies in three Swedish counties. Effects on the local district heating systems were explored, as well as economic effects and impacts on global emissions of greenhouse gases. The study was conducted considering two different energy market cond...

Current developments of the European energy markets are influencing the operation strategy of heat suppliers. Especially providers of district heating systems fed by conventional heat production (i.e. CHP) have to react with appropriate measures to these changes. The integration of thermal storages, decentralization of the heat production, changing heating technologies or adjusting the temperat...

This article identifies and elaborates on preconditions, drivers and barriers behind the development of excess heat based systems of district heating in Sweden. Industrial excess heat based district heating systems are considered generally resource-efficient since it could reduce the use of fossil fuels and emissions of greenhouse gases by saving primary energy for district heating companies su...

The use of geothermal resources for space heating dominates the direct use industry with approximately 37% of all direct use development. Of this, 75% is provided by district heating systems. In fact, the earliest known commercial use of geothermal energy was in Chaudes-Aigues Cantal, France, where a district heating system was built in the 14 century. Today, geothermal district space heating p...