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| 1 | A Review of Modeling Approaches and Tools for the Off-design Simulation of Organic Rankine Cycle显示文摘Organic Rankine Cycles(ORCs) are an effective way to produce electricity from low-grade heat sources, which cannot be effectively obtained using conventional high-temperature Rankine cycles. Due to the lack of available information regarding the real Organic Rankine Cycle units on industrial level, off-design simulation under diversified operating conditions plays a significant role for both the system performance prediction and control strategy design. This paper summarizes the theoretical basis, modeling approaches and tools for ORC off-design simulations. Firstly, a review was conducted on the individual state-of-the-art convective heat transfer correlations and void fraction models. Secondly, different kinds of modeling approaches and simulation tools were proposed, highlighting their relevant characteristics, and were categorized for their specific applications. Moreover, an in-depth analysis of technical challenges related to various applications and focusing on the model accuracy and complexity, computational efficiency, as well as the model compatibility were extensively described and discussed. Finally, the current research trends in this field and the development for further investigations were presented. | LIU Liuchen ZHU Tong GAO Naiping GAN Zhongxue | 2018 | Journal of Thermal Science2018，27，4： | 14 |
| 2 | Stratified air distribution systems in a large lecture theatre:A numerical method to optimize thermal comfort and maximize energy saving显示文摘 | CHENG Yuanda NIU Jianlei GAO Naiping | 2012 | Energy and Buildings2012，55，： | 1 |
| 3 | CFD study on micro-environment around human body and personalized ventilation 显示文摘 | Gao Naiping Niu Jianlei | 2004 | Building and Environment2004，39，7： | 1 |
| 4 | Improvement of facial humidity and reduction of pollutant inhalation in commercial aircraft cabins via application of personalized ventilation显示文摘 | Gao Naiping Niu Jianlei | 2008 | ASHRAE Transactions2008，114，2： | 1 |
| 5 | Feasibility of LTE-Based GEO Satellite Mobile Communication Systems to Support VoIP for Handheld Terminals显示文摘To facilitate the integration of terrestrial and satellite mobile communication systems in the future,the new generation of satellite mobile communication system should be Long-term evolution(LTE)-based.In LTE,voice is carried by Internet protocol(IP)packets(voice over IP,VoIP).The feasibility of LTEbased Geosynchronous earth orbit(GEO)satellite mobile communication systems for Vo IP is discussed.Detailed link budgets are created for typical handheld terminals.The effectiveness of Physical resource block(PRB)bundling and Transmission time interval(TTI)bundling for the capacity improvement of downlink and uplink are evaluated,and further uplink improvement for low level terminals by Narrowband resource block(NRB)scheme is also studied.The analysis results show that the downlink VoIP transmission is mainly power limited,and optimization of PRB or TTI bundling can maximize the capacity.For uplink,only highlevel terminals can support VoIP under the normal LTE frame structure,and TTI bundling and Resource block(RB)block techniques can help the low-level terminals support VoIP transmission. | DING Dan GAO Zhen CHENG Naiping | 2019 | Chinese Journal of Electronics2019，28，4： | 1 |
| 6 | CFD study on microenvironment around human body and personalized ventilation显示文摘 | Gao Naiping Niu Jianlei | 2004 | Building and Environment2004，39，： | 1 |
| 7 | CFD study on microenvironment around human body and personalized ventilation显示文摘 | Gao Naiping Niu Jianlei | 2004 | Building and Environment2004，39，7： | 1 |
| 8 | CFD Study on micro-environment around human body and personalized ventilation显示文摘 | Naiping Gao | 2004 | Building and Environment2004，39，： | 1 |
| 9 | Accelerative iteration for coupled conductive–radiative heat transfer computation in semitransparent media显示文摘 | Wei An Tong Zhu NaiPing Gao | 2014 | International Journal of Heat and Mass Transfer2014，，： | 1 |
| 10 | Coupling CFD and human body thermoregulation model for the assessment of personalized ventilation显示文摘 | Naiping Gao Jianlei Niu Hui Zhang | 2006 | HVAC&R Research2006，12，3： | 1 |
| 11 | CFD study on micro-environment around human body and personalized ventilation显示文摘 | GAO NAIPING NIU JIANLEI | 2004 | Building and Enviromnent2004，39，： | 1 |
| 12 | CFD study on microenvironment around human body and personlized ventilation显示文摘 | Gao Naiping Niu Jianlei | 2004 | Energy and Buildings2004，37，： | 1 |
| 13 | Distribution characteristics of respiratory aerosols in enclosed environ- ments 显示文摘 | Naiping Gao JianLei Niu Moraska Lidia | 2010 | Journal of Southeast University2010，26，： | 1 |
| 14 | A method to generate effective cooling load factors for stratified air distribution systems using a floor-level air supply显示文摘 | Hongtao Xu Naiping Gao Jianlei Niu | 2009 | HVAC & R Research2009，15，5： | 1 |
| 15 | Numerical simulation on exploring influencing factors of wind‑driven natural ventilation effect in large indoor dock显示文摘我国造船行业方兴未艾,船舶行业大型车间室内环境质量差引起的工人健康问题日益受到重视,迫切需要研究适合于大型厂房的高效通风方式。自然通风具有通风量大、且无需风机动力能耗的优势,在大型船舶车间应用广泛。本文采用计算流体动力学方法探究自然通风来流风速、侧墙百叶位置、屋顶通风器面积比例和布置形式对于风压驱动的大型船坞内自然通风效果的影响。结果表明,进风侧受遮挡时对总通风量的影响比排风侧更为明显。不同的来流风速会影响通风位置的风压,这是影响船坞自然通风的决定性外部因素。当屋顶通风器的面积比例增加到一定程度时,继续增大面积对于提高总通风量的效果微弱。当面积比例固定时,改变屋顶通风器的布置形式对于改变自然通风效果的影响可以忽略。 | Jialu Li Hui Deng Xinyu Pan Fanxing Zeng Naiping Gao | 2023 | Low-carbon Materials and Green Construction2023，1，1： | 0 |
| 16 | Study on impact factors of tracer gas method in investigations of gaseous pollutant transport and building ventilation显示文摘Building ventilation is essential to discharge indoor pollutants and improve indoor air quality for occupant health.Tracer gas method is an efficient way in the field of building ventilation to measure ventilation rate and to evaluate the ventilation performance.Literature shows notable deviation of measured ventilation rate using different tracer gases.In the present study,CFD simulations are carried out to analyze He-,CO_(2)-and SF_(6)-based tracer gas methods.The effects of tracer gas density and release rate on the concentration distribution and ventilation effectiveness are studied.Various application scenarios of different ventilation rates and airflow distribution forms are compared.The results show that the deviation of ventilation effectiveness evaluated by different tracer gases can be above 2-4 times,and the error is introduced by non-passive dispersion.Whether tracer gas dispersion is passive or not depends on the relative importance of density difference driven mass transfer to forced convection mass transfer,which is due to the combined effects of density difference,release rate,and indoor airflow velocity,and can be judged by a dimensionless number θ.Under the geometry and ventilation settings in the present study,the critical value of θ is 1.0 for the error range of 5%,and 2.0 for the error range of 10%.When θ is below the critical value,the gas transport is passive and dominated by the indoor ventilation airflow.A release of tracer gas with smaller release rate and smaller density difference into a stronger indoor airflow behaves more passive.Heavier tracer gas tends to significantly overestimate the performance of upper supply and lower exhaust ventilation,and lighter tracer gas aggravates the overestimation of the performance for lower supply and upper exhaust ventilation.In mechanical ventilation rooms with air change rate of 3.0-6.0 h^(−1),a continuous release of tracer gas SF_(6),CO_(2) or He with release rate above 8 mg/s or source concentration above 8-75 ppm should not be considered as passive.This work clarified the passive and non-passive transport characteristics and mechanisms of various tracer gases,which is helpful for the engineering applications of tracer gas method in building ventilation studies. | Naiping Gao Ruge Wang Yan Wu Zhu Wu | 2023 | Building Simulation2023，16，3： | 0 |
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