Process Safety and Environmental Protection最新文献

{"title":"Preparation of a fluorine-free foam for the prevention and control of spontaneous combustion of coal and its flame-retardant properties","authors":"Leilin Zhang,&nbsp;Duolei Kuai,&nbsp;Guangniu Wang,&nbsp;Shengli Li","doi":"10.1016/j.psep.2025.106886","DOIUrl":"10.1016/j.psep.2025.106886","url":null,"abstract":"<div><div>The application of fluorocarbon surfactants is limited because of their difficulty in biodegradation and serious environmental hazards. On this basis, an eco-friendly fluorine-free foam extinguishing agent was developed. A polyether-modified polydimethylsiloxane (Silok 8022), α-olefin sulfonate (AOS) and sodium lauroamphoacetate (LAMC) were used as composite foaming agents, and Mg-Al hydrotalcite (LDHs) was used as the inhibitor. An interfacial rheometer, a foam scanner and a cone calorimeter were used to study the compounding scheme and dosage of surfactants. Results revealed that the foam formed exhibited the best performance when the mass concentrations of Silok 8022, AOS and LAMC were 0.03 %, 0.1 % and 0.075 %, respectively, and that of the LDHs was 1 %. Then, the wettability of fluorine-free foam for coal and its rheological properties were systematically analysed via an interfacial rheometer and rotary rheometer. Compared with the surface free energy (42.52 mJ/m²) of the water-treated coal samples, the surface free energies of the coal samples treated with the coal fly ash three-phase foam, fluorine-containing aqueous film-forming foam and fluorine-free foam were 46.72, 48.88 and 52.83 mJ/m², respectively. The fluorine-free foam achieved the best wettability for coal. Three-stage low–high–low shear tests and amplitude scanning tests revealed that the shear structure recovery rate of fluorine-free foam was 94 %, and the linear viscoelastic region was 0.01 %–1 %. The fluorine-free foam had the strongest self-repair ability and deformation resistance. The inhibition performance of fluorine-free foam was studied by cone calorimeter experiment. It is concluded that fluorine-free foam effectively inhibits the combustion of coal. The flame retardant effect is remarkable. Finally, an experimental platform for small-scale fire extinguishment was constructed to research the fire-quenching ability of fluorine-free foam. Fluorine-free foam has better fire extinguishing and cooling effects on coal pile fires than fluorine-containing aqueous film-forming foam, which consistently and evenly covers the coal surface and rapidly permeates the coal. In addition, the coal body is not reignited, confirming its excellent fire-quenching and flame-retardant performance.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106886"},"PeriodicalIF":6.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the effects of flow/mixture stratification on combustion/stability behaviors of dual-swirl oxy-methane flames: Experimental and numerical study","authors":"Medhat A. Nemitallah ,&nbsp;Mohammed El-Adawy ,&nbsp;Ahmed Abdelhalim ,&nbsp;Mohamed Hamdy ,&nbsp;Ahmed Abdelhafez","doi":"10.1016/j.psep.2025.106912","DOIUrl":"10.1016/j.psep.2025.106912","url":null,"abstract":"<div><div>Oxy-methane (CH₄/CO₂/O₂) partially premixed flames were studied numerically and experimentally in a dual annular counter-rotating swirl (DACRS) burner for clean power production in gas turbines. The velocity of the primary (central) stream was fixed at 5 m/s with varying the secondary (annular) velocities to achieve velocity ratios (Vr) of 3.878, 3, and 2.27 over ranges of equivalence ratios for both the primary (φ_p: 0.4–1) and secondary (φ_s: 0.456–0.85) streams at fixed (OF) oxygen fraction of 34 %. Increasing φ_p (from 0.4 to 1.0) enhances the overall stability of combustion and supports flames of the ultra-lean secondary stream (from 0.595 to 0.456), thereby extending the combustor lean blowout limit to lower global equivalence ratios (φ_g: from 0.577 to 0.499). No flame flashback occurred within the operational <em>φ</em>_p domain up to the stoichiometric secondary stream, <em>φ</em>s = 1.0. Variations in velocity ratios impact flame structure, stability, and lean blowout performance. Velocity ratios of 2.27, 3, and 3.87 correspond to expansion flame angles of 70°, 58°, and 42°, respectively, owing to the Coanda effect, wherein fluid flows tend to adhere to solid surfaces. The laminar flame speed is more responsive to variations in φ_s than φ_p. Better flow/flame interactions were achieved at lower Vr with bigger recirculation zones and better flame-holding stability. The intricate relationship between temperature distribution and velocity ratios emphasizes their significant role in influencing chemical reactions, particularly in elevating CO concentrations.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106912"},"PeriodicalIF":6.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovative circular bioeconomy and decarbonization approaches in palm oil waste management: A review","authors":"Kai Chen Goh ,&nbsp;Tonni Agustiono Kurniawan ,&nbsp;G. Abdulkareem AlSultan ,&nbsp;Mohd Hafiz Dzarfan Othman ,&nbsp;Abdelkader Anouzla ,&nbsp;Faissal Aziz ,&nbsp;Imran Ali ,&nbsp;Joan Cecilia C. Casila ,&nbsp;Muhammad Imran Khan ,&nbsp;Dongdong Zhang ,&nbsp;Choo Wou Onn ,&nbsp;Ta Wee Seow ,&nbsp;Haryati Shafii","doi":"10.1016/j.psep.2024.12.127","DOIUrl":"10.1016/j.psep.2024.12.127","url":null,"abstract":"<div><div>The palm oil sector is a major contributor to global waste and greenhouse gas (GHG) emissions, posing significant challenges for sustainability. This study explores innovative circular bioeconomy and decarbonization strategies in palm oil waste management, with a focus on reducing environmental impact and improving resource efficiency within the industry. This work also evaluates the potential of waste-to-energy technologies, such as anaerobic digestion and biomass combustion, to reduce carbon emissions and generate renewable energy from palm oil mill by-products. Key findings reveal that integrating circular bioeconomy practices, including the reuse of waste for bioproducts and biofuels, can decrease GHG emissions by up to 30 % and significantly reduce waste disposal costs. Transitioning to biogas and solar energy could reduce the carbon footprint by 40–50 %, while adopting carbon capture and storage (CCS) could capture 90 % of CO₂ emissions, equivalent to 1.2 million tons annually. Enhanced reforestation projects could sequester up to 1.1 billion tons of CO₂ and improved palm oil mill effluent (POME) management could cut CH₄ emissions by 70 %. Additionally, bioenergy production from palm biomass significantly lowers operational emissions, contributing to a 35 % reduction in the industry's GHG output. The adoption of sustainable certifications like RSPO has reduced deforestation by 15 %. Furthermore, the study identifies key technological and economic barriers to widespread adoption, such as high initial capital investment and limited infrastructure. Policy interventions, such as carbon pricing and subsidies for green technologies, are recommended to accelerate the implementation of these strategies. The findings highlight the potential of circular bioeconomy and decarbonization approaches to transform palm oil waste management into a more sustainable and resource-efficient process, contributing to both environmental and economic benefits. This research provides actionable policy recommendations to promote sustainability and achieve carbon-neutrality in the palm oil industry, aligning with global climate targets and UN Sustainable Development Goals (SDGs).</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"195 ","pages":"Article 106746"},"PeriodicalIF":6.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A hybrid machine learning model for NOx emission concentration prediction from sludge incineration","authors":"Song Luo ,&nbsp;Lihua Wang ,&nbsp;Hongxian Ji ,&nbsp;Qifeng Zhong ,&nbsp;Haibin Cui ,&nbsp;Fei Wang","doi":"10.1016/j.psep.2025.106854","DOIUrl":"10.1016/j.psep.2025.106854","url":null,"abstract":"<div><div>Accurate prediction of NO_x emission concentration is crucial for optimizing combustion processes and enhancing flue gas treatment in incineration systems. However, the traditional prediction models that employ data-driven methods face significant challenges due to insufficient input feature information, as well as low computational efficiency and robustness. These limitations hinder the accurate real-time prediction of NO_x emission concentration. To address this issue, this paper proposes an advanced hybrid model for predicting NO_x emission concentration. Initially, static and dynamic flame features are extracted from flame images and integrated with Distributed Control System (DCS) parameters to serve as the model's input features, while the NO_x emission concentration constitutes the model's output feature. Subsequently, the lag time between NO_x emissions and the input features is determined using mutual information (MI), followed by data reorganization to develop various predictive models for NO_x emission concentration. Finally, the extremely randomized trees (ERT) model, demonstrating superior performance, is further optimized using Bayesian optimization with tree-structured Parzen estimators (BO-TPE). Experimental results indicate that the ERT model optimized with BO-TPE outperforms state-of-the-art models, making it suitable for online optimization of industrial pollutant control and potentially contributing to cleaner production.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106854"},"PeriodicalIF":6.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic catalytic effects of nickel-based catalysts on calcium aluminate supports in methane dry and combined reforming processes","authors":"Ehsan Akbari ,&nbsp;Mehran Rezaei ,&nbsp;Zahra Montazeri ,&nbsp;Roya Monjazi ,&nbsp;Gholamali Mansourian","doi":"10.1016/j.psep.2025.106903","DOIUrl":"10.1016/j.psep.2025.106903","url":null,"abstract":"<div><div>The significance of converting natural gas, particularly methane, into valuable chemical components is crucial across various industries. In this investigation, calcium aluminate powders (CA) with various CaO/Al₂O₃ molar ratios were synthesized and the resulting calcined samples were employed as support for the preparation of nickel-based catalysts. The research indicated a significant impact of the calcium aluminate content on the physical and chemical structures as well as the catalytic efficiency of the samples. Among the evaluated samples, 12 wt%Ni/CA with a cement percentage of 30.55 % and a BET area of 8.56 m².g⁻¹ demonstrated superior catalytic activity, stability, and carbon deposition suppression in methane dry reforming. The results indicated that increasing the nickel loading from 6 to 15 wt% enhanced the conversion of CH₄ and CO₂. However, the maximum conversion values for CH₄ and CO₂ were achieved at 92.9 % and 98.4 %, respectively, at 800 ℃ over the sample containing 15 wt% Ni. Additionally, the selected catalyst, 12 wt%Ni/CA, was utilized in the direct reduced iron (DRI) process to assess its potential in DRI process. The study revealed an improvement in CH₄ conversion from 20 % to 91.6 %, and the H₂/CO ratio decreased from 2.55 to 1.9 with an increase in temperature from 600 to 800 ℃. The results also demonstrated satisfactory performance of the studied sample under real feed conditions containing 5 vol% propane.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106903"},"PeriodicalIF":6.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radio wave-driven enhancement of microbial fuel cells: Converting waste waves to power","authors":"Pushparaj Pal ,&nbsp;Chin-Tsan Wang","doi":"10.1016/j.psep.2025.106885","DOIUrl":"10.1016/j.psep.2025.106885","url":null,"abstract":"<div><div>Reducing traditional energy sources like petroleum and fossil fuels demands sustainable alternatives. This paper focuses on the potential of microbial fuel cells (MFCs) for electricity generation from wastewater and unused radio waves. MFCs use wastewater as a microbial activity to treat wastewater and produce electricity. On the other hand, unused radio waves are collected with the help of external circuits to harvest the energy and are later integrated into the MFC. This harvested energy can be used partly for the MFC chamber to reactivate inactive microbes and contributes to enhanced power production. The rest of the harvested energy can be stored in the MFCs. This method reduces pollution from radio waves and wastewater, turning them into energy and contributing to environmental sustainability. This is due to the global growth of wireless technologies like RF-based bandwidth devices like Wi-Fi, Bluetooth connections, and cell phone networks. Some other inter-related networks, like ground base towers to satellites or used by defense and airplane industries, contribute to everyday radio signal generations due to their activity increasing electromagnetic pollution.</div><div>Radio waves between this or higher range of frequency band 900 MHz and 2.4 GHz release invisible and negligible radiation effects on human health, wildlife, and other environmental species. Due to this effect, there has been a downfall in the population of birds and other related species in the last 20 years. The World Health Organization (WHO) categorizes radiofrequency electromagnetic fields as possibly carcinogenic (Group 2B), with human tissue absorbing up to 1.43 × 10⁻² W/kg of 900 MHz signals. Wildlife faces navigation issues, and wastewater pollution degrades ecosystem stress. This paper recommends integrating radio wave sifting into MFCs to increase microbial activity and electron generation by 20–30 %. The additional power (more than 0.3 µW/cm²) can be stored in MFCs, improving system efficiency by 10–15 %. This approach reduces electromagnetic pollution even by enhancing renewable energy and wastewater treatment.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106885"},"PeriodicalIF":6.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of microalgae cultivation and CO2 capture in a three-stage bubble column photobioreactor: Evaluation of control strategies","authors":"Emmanuel Yahaya ,&nbsp;Wan Sieng Yeo ,&nbsp;Jobrun Nandong","doi":"10.1016/j.psep.2025.106906","DOIUrl":"10.1016/j.psep.2025.106906","url":null,"abstract":"<div><div>Global energy consumption is rising and worries about the depletion of fossil fuels and unchecked carbon dioxide (CO₂) emissions make the switch to sustainable energy sources urgent. Due to their fast growth rates with high CO₂ fixation, efficient nutrient removal from wastewater such as palm oil mill effluent, and lower cultivation area needs compared to traditional energy crops, microalgae, known for their adaptability, present a viable renewable energy alternative. To maximize microalgae growth in a photobioreactor system and specifically target the capture of high CO₂ emissions from waste flue gases in the palm oil industry, this study focuses on evaluating Proportional-integral (PI) control strategies for such a purpose. The results show that algal productivity and CO₂ capture efficiency depend critically on flue gas flow rate, CO₂ inflow molar percentage, and higher dissolved oxygen (DO) levels. The hindering factors on algae growth are the elevated DO levels, highlighting the necessity of an efficient control strategy to reduce the generated DO in the medium. One such strategy's implementation resulted in up to 75 % CO₂ capture efficiency, or a 2 % CO₂ molar fraction in the headspace, along with significant algal growth and specific productivity, suggesting possible uses in the generation of biodiesel or biobutanol. The microalgae-specific productivity and the carbon capture efficiency were better balanced by including control techniques to lower DO levels. The study highlighted the importance of creating customized control systems to maximize the delicate opposing trends between CO₂ capture and microalgae production in sustainable energy applications.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106906"},"PeriodicalIF":6.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mitigating the effect of inevitable Cu2+ by PHGMS for improving chalcopyrite-molybdenite flotation separation performance","authors":"Xiaowei Li,&nbsp;Pulin Dai,&nbsp;Zixing Xue,&nbsp;Luzheng Chen","doi":"10.1016/j.psep.2025.106920","DOIUrl":"10.1016/j.psep.2025.106920","url":null,"abstract":"<div><div>The release of Cu²⁺ from secondary copper minerals such as bornite and malachite has been a prevalent issue in the chalcopyrite-molybdenite flotation separation, as it significantly impacts the separation performance. This study investigated the depressing effect of Cu²⁺ released from bornite and malachite on chalcopyrite-molybdenite flotation and the adsorption mechanism of sodium sulfide on Cu²⁺ activated molybdenite surface, and the magnetic capture properties of these minerals during the pulsating high-gradient magnetic separation (PHGMS) were compared. The flotation results indicated that Cu²⁺, as the main component in the supernatant of bornite and malachite, significantly depressed the molybdenite in the sodium sulfide kerosene system, reducing its recovery from 84.87 % in deionized water to 60.44 % in the supernatant. The Zeta potential measurements and the Density Functional Theory (DFT) calculations confirmed that HS⁻ was chemisorbed on the molybdenite surface through the bridging effect of Cu²⁺, thus impairing the molybdenite flotation performance. The PHGMS experiments indicated that the recoveries of chalcopyrite, bornite, and malachite in the magnetic concentrate exceeded 90 %, while that of molybdenite was below 10 % at 0.8 T magnetic induction. The verification experiments showed that the recovery of pure molybdenite pre-treated by PHGMS was nearly 20 % higher than that of untreated samples in the supernatant. It is clear the PHGMS pretreatment for porphyry copper-molybdenum ore might effectively mitigate the impact of Cu²⁺ released from bornite and malachite on the chalcopyrite-molybdenite flotation separation, by separating out magnetic copper-containing minerals. This study has fully elucidated the effect of released Cu²⁺ on flotation performance and affirmed the efficacy of PHGMS in mitigating this effect, providing vital insight into the highly efficient and environmentally friendly utilization of porphyry copper-molybdenum ore resources.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106920"},"PeriodicalIF":6.9,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances in electrochemical methods for rare earth elements recovery: “A comprehensive review”","authors":"Tugce Akca-Guler ,&nbsp;Ayse Yuksekdag ,&nbsp;Borte Kose-Mutlu ,&nbsp;Ismail Koyuncu","doi":"10.1016/j.psep.2025.106897","DOIUrl":"10.1016/j.psep.2025.106897","url":null,"abstract":"<div><div>The global demand for Rare Earth Elements (REEs), critical for high-tech industries, presents significant environmental challenges due to the impacts of traditional mining methods. This review focuses on the potential of electrochemical techniques for the sustainable recovery of REEs, particularly from secondary sources like electronic waste. These methods offer substantial environmental benefits, such as lower energy use and reduced hazardous waste. The review evaluates key electrochemical techniques, including electrochemical leaching, electrodialysis, electrosorption, and electrodeposition, for their effectiveness in REEs recovery. Electrochemical leaching dissolves REEs from complex materials using fewer toxic chemicals. Electrodialysis, using an electric field, efficiently separates and purifies REEs from other ions. Electrosorption employs charged surfaces to selectively adsorb REEs with minimal energy, while electrodeposition directly recovers high-purity REEs from solutions. A life cycle analysis (LCA) comparing these techniques to traditional methods highlights their superior sustainability, especially in lowering energy use and greenhouse gas emissions. These methods contribute significantly to resource sustainability and the circular economy. Advancing electrochemical technologies is essential for minimizing environmental impacts, conserving resources, and meeting the increasing demand for REEs in an environmentally friendly way.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106897"},"PeriodicalIF":6.9,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Techno-economic feasibility of heat recovery chillers in subtropical hotel buildings","authors":"Fu-Wing Yu,&nbsp;Wai-Tung Ho,&nbsp;Chak-Fung Jeff Wong","doi":"10.1016/j.psep.2025.106916","DOIUrl":"10.1016/j.psep.2025.106916","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"196 ","pages":"Article 106916"},"PeriodicalIF":6.9,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}