Economic Evaluation of Energy-Saving Retrofit of Existing Hotels

Abstract

With the improvement of China’s economic strength, the energy consumption of public buildings is continually increasing, notably for hotels. The energy consumptin of a hotel accounts for more than 15% of its revenue, and the average energy consumption per floor area is more than 10 times that of urban residents. Therefore, the energy-saving retrofit of existing hotels is imperative. This study investigates the economic evaluation methods for existing hotel retrofit projects, and constructs an economic evaluation model using economic evaluation and cost-effectiveness ratio as the base. The energy-saving retrofit measures of 15 existing hotels in Jiangsu Province, China, are used as a case study to demonstrate the research framework. The results indicate that the heating, ventilation and air conditioning (HVAC) system, monitoring system, lighting system, domestic hot water system, and building envelope system are the five energy-saving retrofit technical measures with the highest application ratio. The average dynamic investment payback period of hotels in Jiangsu Province is 2.96 years, which meets the requirement of no more than 10 years specified in the energy-saving building standard. The cost-effectiveness ratio of different technologies differs significantly. Lighting and kitchen systems have the highest energy-saving efficiency, followed by monitoring systems, while HVAC and domestic hot water systems have the lowest. The research presented in this paper contributes to the economic evaluation of the energy-saving retrofit of hotels.

Optimizing Energy-Saving Measures in New Residential Buildings Regarding Life-Cycle Costs

“…Another group of publications is subsequently focused on the energy savings of specific types of buildings or specific projects in the areas of residential and non-residential construction. In the case of non-residential construction, it is possible to point, for example, to a contribution [11], which is focused on the great potential of energy savings in the case of the implementation of low-energy measures in the case of hotels with an indicated low time of their economic return. Non-residential buildings, more precisely corporate buildings, are solved in a contribution [12].…”

“…The effectiveness of energy-saving measures is monitored on the basis of various approaches and methodologies of the aforementioned authors, in particular the concepts of NPV, IRR, Payback Period [8,[10][11][12][13]16,[20][21][22]24,25], multicriterial analysis [14], or marginal willingness to pay [17,18]. The authors of this article focused on the monitoring of differing LCCs in new residential buildings.…”

Investigating the Energy-Saving Effectiveness of Envelope Retrofits and Photovoltaic Systems: A Case Study of a Hotel in Urumqi

“…Wang et al took the energy-saving retrofit measures of 15 existing hotels in Jiangsu Province as examples. They found that heating, ventilation and air conditioning, monitoring, lighting, domestic hot water, and building envelope systems were the five energy-saving retrofit technical measures with the highest proportion of application [15]. Some scholars use computer simulation technology to study the energy-saving retrofit strategies of existing buildings.…”

Energy Analyses and Optimization Proposals for Hotels in Sicily: A Case Study

“…The simulations are carried out by TRNSYS 18. They obtained that the optimal choice of an energy mix (including Renewable Energy Sources) is a very important solution to power a building [15]. Yu Wang et al analyzed the energy consumption in 15 hotels in Jiangsu Province, China.…”