Abstract

The energy consumption of buildings is very important for both economic and environmental reasons. Newly built buildings are characterized by higher insulation and airtightness of the building envelope, and are additionally equipped with technologies that minimize energy consumption in order to meet legal requirements. In existing buildings, the modernization process should be properly planned, taking into account available technologies and implementation possibilities. Hotel buildings are characterized by a large variability of energy demand, both on a daily and a yearly basis. Monitoring systems, therefore, provide the necessary information needed for proper energy management in the building. This article presents an energy analysis of the Turówka hotel located in Wieliczka (southern Poland). The historical hotel facility is being modernized as part of the project to adapt the building to the requirements of a sustainable building. The modernization proposal includes a trigeneration system with a multifunctional reverse regenerator and control module using neural algorithms. The main purpose is to improve the energy efficiency of the building and adapt it to the requirements of low-energy buildings. The implementation of a monitoring system enables energy consumption to be reduced and improves the energy performance of the building, especially through using energy management systems and control modules. The proposed retrofit solution considers the high energy consumption, structure of the energy demand, and limits of retrofit intervention on façades.

Highlights

  • Ever-tightening energy efficiency regulations and the development of environmental awareness within society contribute to technological progress in energy and sanitary installations

  • Heat energy demand was considered in four categories: heating/cooling energy for maintaining the desired indoor temperature, energy for district hot water heating, energy for the swimming pool, and the energy for the technological plant

  • Measurements were taken of the system before modernization and aimed to create an energy consumption profile in order to help optimize the planned energy performance improvement

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Summary

Introduction

Ever-tightening energy efficiency regulations and the development of environmental awareness within society contribute to technological progress in energy and sanitary installations. The continuous development of the building sector results in an increasing energy demand and, as a result, an increase in carbon dioxide emissions. 50% of final energy consumption is used for heating and cooling purposes, 80% of which is related to ensuring comfortable thermal conditions in Energies 2020, 13, 1968; doi:10.3390/en13081968 www.mdpi.com/journal/energies. This negative trend may be halted by using renewable energy sources and new solutions with higher efficiency. The simplest solution to save energy would be to design a building using materials with low thermal conductivity and high-efficiency heating and/or cooling technology

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