Peers gegen Disko-Unfälle – eine Initiative führt von Sachsen-Anhalt nach Europa

Fredersdorf, Frederic; Heckmann, Wolfgang

doi:10.1007/978-3-531-92170-9_3

Cited by 1 publication

(3 citation statements)

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“…The dataset that was also used in ref. [22] was first checked for plausibility, and all models with a WTOL < 50 °C removed from the analysis. Note that the circumstance that the WTOL is typically provided by the manufacturer and not characterized or verified by the test labs leaves the possibility for inaccuracies of the information on the data sheet.…”

Section: Resultsmentioning

confidence: 99%

“…This has two main reasons: on the one side, comparing not only the WTOL but also COP efficiencies for available R290 HPs with all other market available HPs at higher supply temperatures [ 22 ] ; on the other side, designs with two‐stage compression (real or quasi two‐stage by vapor injection) could lead to higher efficiencies since it is the method of choice and known technique to allow high‐temperature lift HPs as it is massively used for cold‐climate HPs. [ 31 ]…”

Section: Resultsmentioning

confidence: 99%

“…To do so, results from multiple research projects at the Fraunhofer Institute for Solar Energy Systems are combined. [ 19–23 ] In the individual projects, specific aspects were investigated, developed, and evaluated based on experimental monitoring data. This article now presents a meta‐analysis linking different recent projects and reevaluating their results on a consistent methodological basis.…”

Section: Introductionmentioning

confidence: 99%

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Heat Pump Systems in Existing Multifamily Buildings: A Meta‐Analysis of Field Measurement Data Focusing on the Relationship of Temperature and Performance of Heat Pump Systems

Lämmle,

Metz,

Kropp

et al. 2023

Energy Tech

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Heat pumps play a central role in decarbonizing the heat supply of buildings. However, implementing heat pumps in existing buildings, still presents a significant challenge due to high temperature requirements. In this paper, we present a systematic analysis of the effects of heat source temperatures, maximum heat pump condenser temperatures, and system temperatures on the seasonal performance of heat pump systems. The quantitative performance analysis encompasses over 50 heat pumps installed in residential buildings, revealing correlations between the building characteristics, observed temperatures, and heat pump type. The performance of a heat pump system retrofitted to a 30‐dwelling multifamily building is presented in more detail. The bivalent heat pump system combines air and ground as heat sources and achieves a seasonal performance factor of 3.25 with a share of the gas boiler of 27% for the provision of space heating and domestic hot water in its first year of operation. These findings demonstrate the technical feasibility of retrofitting heat pumps in existing buildings and provide insights into overcoming the challenges associated with high temperature requirements.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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