Techno-economic feasibility of heat recovery chillers in subtropical hotel buildings

IF 7.8 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL Process Safety and Environmental Protection Pub Date : 2025-04-01 Epub Date: 2025-02-14 DOI:10.1016/j.psep.2025.106916

Fu-Wing Yu, Wai-Tung Ho, Chak-Fung Jeff Wong

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Abstract

Despite the environmental and economic benefits of heat recovery chillers (HRCs), their advantages are not well-identified, particularly in subtropical hotel buildings. This study investigates the techno-economic feasibility of using HRC systems in subtropical hotel buildings, compared to conventional air-cooled and water-cooled chiller systems. The study employs EnergyPlus simulations to model the performance of the different chiller systems, and assesses the operating costs based on utility tariffs in Hong Kong. The results show that by recovering waste condenser heat for domestic hot water, HRCs can achieve 40.44 % energy savings and 57.12 kgCO₂e/m² annual emissions reduction, surpassing the benefits of solar water heating. HRCs also demonstrate 28.44 % and 10.71 % lower life cycle costs compared to air-cooled and water-cooled systems, respectively, with a 160.94 % return on investment. This research highlights the unique advantages of HRCs in subtropical regions and their potential to drive sustainable and cost-effective cooling solutions in hotel buildings, which have not been extensively explored before.

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热回收式制冷机在亚热带宾馆建筑中的技术经济可行性

尽管热回收冷却器（HRCs）具有环境和经济效益，但其优势尚未得到很好的识别，特别是在亚热带酒店建筑中。本研究探讨了在亚热带酒店建筑中使用HRC系统的技术经济可行性，并与传统的风冷和水冷式制冷系统进行了比较。本研究采用EnergyPlus模拟系统模拟不同冷水机系统的性能，并根据香港的公用事业收费评估运作成本。结果表明：利用凝汽器余热回收生活热水，HRCs节能40.44 %，年减排57.12 kgCO2e/m2，超过了太阳能热水的效益。与风冷和水冷系统相比，hrc的寿命周期成本分别降低了28.44 %和10.71 %，投资回报率为160.94 %。这项研究突出了亚热带地区HRCs的独特优势，以及它们在推动酒店建筑可持续和经济高效的冷却解决方案方面的潜力，这在以前没有得到广泛的探索。

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.