Feasibility of Energy Saving Renovation Measures in Urban Buildings: The Impact of Energy Prices and the Acceptable Payback Time Criterion

 

Feasibility of Energy Saving Renovation Measures in Urban Buildings: The Impact of Energy Prices and the Acceptable Payback Time Criterion

Abstract

The energy renovation of existing buildings is a critical strategy for reducing energy consumption in the building sector, improving indoor thermal comfort, and enhancing environmental conditions in urban areas. However, this process presents technical, economic, and social challenges, especially in regions with specific economic constraints such as South-Eastern Europe and Greece. Northern Greece, with its cold and prolonged heating season, has been the focus of a series of studies since 1994 aimed at addressing these challenges and developing viable energy-saving proposals. Public and mixed-use buildings, which constitute a significant portion of the building stock, are ideal candidates for energy-saving measures due to their potential to serve as pilot demonstrators for privately owned buildings. Despite the benefits, the low energy prices over the past decade have hindered the implementation of such measures, as these investments are capital-intensive. The recent sharp increase in oil prices has highlighted the short-sightedness of this policy. This paper presents the results of a study conducted to determine the potential for energy-saving renovation measures in a representative sample of buildings. The study evaluates the feasibility of these measures under realistic conditions and examines how this feasibility is affected by rapidly changing economic conditions.

Introduction

The renovation of existing urban buildings to improve energy efficiency is essential for reducing overall energy consumption and improving environmental and thermal comfort conditions. This necessity is even more pronounced in urban areas, where buildings contribute significantly to energy use and carbon emissions. However, the feasibility of these renovations is influenced by various factors, including energy prices and acceptable payback time criteria.

Background

Economic and Technical Challenges

In many cities, especially in South-Eastern Europe and Greece, the urban building landscape is characterized by outdated infrastructure and economic constraints that pose significant challenges to energy-saving renovations. Northern Greece, in particular, experiences a cold and prolonged heating season, making energy efficiency improvements even more critical.

Role of Public and Mixed-Use Buildings

Public and mixed-use buildings are ideal candidates for energy-saving measures due to their substantial presence in the building stock and their potential role as pilot projects for private buildings. However, historically low energy prices have deterred investments in energy efficiency, as the perceived payback period for such investments was considered too long.

Study Overview

Objectives

This study aims to:

1. Assess the potential for energy-saving renovation measures in a representative sample of urban buildings.
2. Evaluate the feasibility of these measures considering current and projected energy prices.
3. Analyze the impact of acceptable payback time criteria on the decision-making process for energy renovations.

Methodology

A comprehensive analysis was conducted on a representative sample of buildings in Northern Greece. The study considered various energy-saving measures, including insulation improvements, heating system upgrades, and the use of renewable energy sources. Economic feasibility was evaluated under different scenarios of energy price fluctuations and acceptable payback periods.

Results and Discussion

Energy-Saving Potential

The analysis revealed significant potential for energy savings in the sampled buildings. Measures such as improving insulation, upgrading heating systems, and integrating renewable energy sources were found to be highly effective in reducing energy consumption.

Feasibility Analysis

The feasibility of implementing these measures was heavily influenced by energy prices and payback time criteria. During periods of low energy prices, the payback period for energy-saving investments was longer, making them less attractive. However, the recent increase in energy prices has improved the economic viability of these measures, highlighting the need for timely investments.

Policy Implications

The findings suggest that policy interventions are necessary to encourage energy-saving renovations. These could include financial incentives, subsidies, and regulatory measures to support investments in energy efficiency, particularly in regions with prolonged heating seasons.

Conclusion

The study underscores the importance of energy-saving renovations in urban buildings for achieving energy efficiency and improving environmental conditions. While low energy prices have historically impeded these efforts, the recent rise in energy costs has made such investments more feasible. Policymakers must consider the dynamic economic conditions and provide support to facilitate the adoption of energy-saving measures, ensuring long-term benefits for both the environment and urban building occupants.

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