Energy Efficiency Analysis Carried Out by Installing District Heating on a University Campus. A Case Study in Spain

Abstract

This article analyses the reduction of energy consumption following the installation of district heating (DH) in the Miguel Delibes campus at the University of Valladolid (Spain), in terms of historical consumption and climate variables data. In order to achieve this goal, consumption models are carried out for each building, enabling the comparison of actual data with those foreseen in the model. This paper shows the statistical method used to accept these models, selecting the most influential climate variables data obtained by the models from the consumption baselines in the buildings at the Miguel Delibes campus through to the linear regression equations with a confidence level of 95%. This study shows that the best variables correlated with consumption are the degree-days for 58% of buildings and the average temperature for the remaining 42%. The savings obtained to date with this third generation network have been significantly higher than the 21% average for 33% of the campus buildings. In the case of 17% of the buildings, there was a significant increase in consumption of 20%, and in the case of the remaining 50% of the buildings, no significant differences were found between consumption before and after installation of district heating.

Industrial Decarbonization by a New Energy-Baseline Methodology. Case Study

“…where there is constant energy consumption, E 0 , which does not depend on the production carried out, and another variable part required to transform the raw material, m·P. However, in a large industry with several energy sources and with complex uses of energy applied to several products at different times throughout the year, choosing and establishing an appropriate Energy Baseline type may take time and require efforts based on analysis, through the establishment of statistical or mathematical models [35][36][37].…”

Energy, Environmental, and Economic Analyses of a District Heating (DH) Network from Both Thermal Plant and End-Users’ Prospective: An Italian Case Study

“…It has also been shown how (i) the supply temperature reduction, (ii) the pipe sizes reduction, and (iii) the increasing of the heat supplied to the network affect the exergetic efficiency optimization procedures. Marina Domingo et al [19], instead, investigated the reduction of the energy consumption before and after the installation of a DH network in a Spanish University Campus in terms of historical consumption and climate variables data. The results obtained with the DH network were (i) energy savings higher than 21% for 33% of the campus buildings, (ii) increase in consumption of 20% in 17% of the buildings, and (iii) no significant differences in the remaining buildings.…”