Experimental Plant for Analyzing the Technical Feasibility of Decentralized Solar Heat Feed-In
Abstract
The research project “Decentralized integration of heat from renewable energies into the CHP district heating system of Stadtwerke Düsseldorf AG” (short title SWD.SOL) started in May 2015. Five project partners are involved: the utility Stadtwerke Düsseldorf AG, the German district heating association AGFW, the housing company Rheinwohnungsbau GmbH Düsseldorf, the environmental agency of the state capital (Umweltamt Landeshauptstadt Düsseldorf) and the Steinbeis Research Institute Solites. The objective of the project is to analyze the technical feasibility of decentral heat feed-in based on the example of a mid-large solar thermal plant. For this purpose, an experimental plant composed of a prototype feed-in substation and a collector field with 218 m2Aperture (232 m2Gross) was installed in a multi-family building supplied by district heat. The experimental plant is located in Düsseldorf. The operational behavior of the plant is monitored and evaluated. These measurement data deliver the base for a simulation study, whose aim is to optimise the controlling and operational management concept of the feed-in station. The following publication focuses on three main aspects. At first, the technical challenges for solar thermal plants with decentralized feed-in into district heating networks are discussed. At second, the hydraulic design of the experimental feed-in station is presented. As third aspect, first monitoring results of the solar heat feed-in are shown.