Abstract

The HR (heat recovery) is generally assessed very positively from a business and economic point of view. In order to demonstrate this development, a first study will evaluate around 5,000 design data elements. First, the designs are evaluated with the question of how the key efficiency characteristics of the HR have changed throughout the course of the years 2014 to 2017. Afterwards, all relevant design files are subjected to an economic efficiency calculation under defined conditions, in order to determine the potential for a multidimensional optimization. Furthermore, the impact of the EU 1253/2014 benchmarks from 2020 onwards will also be examined. In order to demonstrate this development in europe, a second study will evaluate around 3,300 design data elements. First, the designs are evaluated with the question of how the key efficiency characteristics of the HR have changed throughout the course of the years 2015 to 2018. Primary, all relevant design files are subjected to an economic efficiency calculation under defined conditions, in order to determine the potential for a multidimensional optimization. Then, the impact of the EU 1253/2014 benchmarks from 2020 onwards will also be examined. The influence of the climate is thereby also taken into account by examining three European sites (North-South view). At the same time, the influence of the run time of the systems will be calculated. Ultimately, the analyses will provide recommendations for the future design of the Ecodesign regulation.

Highlights

  • Afterwards, all relevant design files are subjected to an economic efficiency calculation under defined conditions, in order to determine the potential for a multidimensional optimization

  • The designs are evaluated with the question of how the key efficiency characteristics of the HR have changed throughout the course of the years 2015 to 2018

  • All relevant design files are subjected to an economic efficiency calculation under defined conditions, in order to determine the potential for a multidimensional optimization

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Summary

The development of heat recovery in Germany as a base

In the last four years (see Figure 5), the pressure losses of HR systems have gradually decreased from Δp = 181 Pa in 2014 to Δp = 167 Pa in 2017, the transmission degrees and the equipment required for heat recovery have increased. This shows a stagnation in the further development of average transmission degrees. It becomes evident that the increase in the efficiency of the HR was "compensated" by a reduction in the flow speeds in the HR This even made it possible to reduce the pressure loss of the HR despite increasing transmission degrees. The question arises as to whether this development provides economic advantages, because the HR is an economic measure, and an economic one that explicitly affects each user in each individual case

Development of heat recovery in Europe
Reference points
Evaluation
DIN SPEC 15240:2018-08 - Entwurf
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