Publication

Solar thermal and geothermal integration with low temperature CO 2 DENs

Abstract

Taking into account the high efficiency of solar thermal collectors and the fact that heating demands represent around 80% of the total energy needs in residential buildings, it is of interest to integrate solar thermal systems to supply HVAC services. However, both solar energy and HVAC needs have strong daily and seasonal variations, and require an efficient long term storage solution. The underground represents an efficient storage medium, which can compensate the latter mismatch; in winter, surplus heat can be extracted to satisfy the strong demand, while in summer, the rejected heat from cooling systems – in addition to the heat produced from the solar thermal collectors can be reinjected in the ground, therefore achieving long term energy storage. Low temperature district energy networks do not only supply heating and cooling to districts, but they also have the ability to harvest heat from renewable or low temperature waste heat sources and to integrate with long term heat storage systems, such as ground storage. This work looks at the integration of low temperature CO2 networks with solar thermal and geothermal storage to provide energy services. Solar thermal collector areas of 12.5 m2/cap are required for typical urban centers to close yearly energy balance in the ground.

About this result
This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chatbot

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.