Publikation

Fakultät 05
Performance analysis of efficiency calculation methods for heat production units by use of long-term measurement data
Kategorie:
Publikation
Themengruppe:
Zeitungsartikel
Extern/e AutorIn:
Johannes Elfner, Jürgen Zeisberger
Jahr:
2019
Weiteres

PROCEEDINGS OF ECOS 2019 - THE 32ND INTERNATIONAL CONFERENCE ON EFFICIENCY, COST, OPTIMIZATION, SIMULATION AND ENVIRONMENTAL IMPACT OF ENERGY SYSTEMS

JUNE 23-28, 2019, WROCLAW, POLAND


Optimizing the efficiency of residential energy systems is important to reduce the CO2 emissions of the building stock. A field test with an innovative potable hot water (PHW) appliance will be presented, reducing the return flow temperature to 16°C. This increases the efficiency of the heat production units (HPU) to more than 98 %. Measuring this efficiency becomes more complex with new residential energy systems. Multiple HPUs, each having multiple return flow ports, impede the use of heat and gas meters as a reliable and accurate measure. Requiring more meters, the measurement error is increased. Furthermore, the delayed response of heat meters doesn’t allow for analyzing transient processes. Thus a detailed combustion analysis will be introduced to accurately calculate the efficiency of an arbitrary number of HPUs with multiple ports. Its performance will be investigated and compared to other methods with regard to measurement errors, accuracy and dynamic response. For this, long term measurement data from the field test will be used.

download