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学者姓名：马国远
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Abstract ：
Since the launch of China's "coal to electricity" project, many new room radiator heating devices have been developed in China, such as split air conditioning and water-loop heat pump systems. In order to avoid the sense of blowing brought by split air conditioners and overcome the problem of low energy efficiency of water-loop heat pump system, relevant researchers proposed the natural convection heat exchange system. Although natural convection system solves the above problems, it is still facing the problem of low heat exchange efficiency, complexity of the system structure and other problems. In order to solve the above problems, a heat pump system with wire-and-tube heat exchange terminal based on natural convection heat transfer is proposed and a set of prototype is developed. The system performance, indoor air temperature distribution and system start-up characteristics under different working conditions were tested in the psychrometric room. The results show that the heat pump system can achieve a heating COP (coefficient of performance) of 3.55 when the outdoor temperature is -5 C-degrees and the indoor temperature is 20(degrees)C and a cooling COP of 2.83 when the outdoor temperature is 40(degrees)C and the indoor temperature is 27(degrees)C. The indoor temperature is uniformly distributed, and the human body has better sense of thermal comfort. These works provide a new choice for the heating and cooling of residential buildings.
Keyword ：
Wire-and-tube Wire-and-tube Heat pump Heat pump Thermal performance Thermal performance Natural convection Natural convection
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| GB/T 7714 | Gong, Yuexuan , Ma, Guoyuan , Xu, Shuxue et al. Experimental study on heat pump system with wire-and-tube heat exchange terminal [J]. | THERMAL SCIENCE AND ENGINEERING PROGRESS , 2024 , 54 . |
| MLA | Gong, Yuexuan et al. "Experimental study on heat pump system with wire-and-tube heat exchange terminal" . | THERMAL SCIENCE AND ENGINEERING PROGRESS 54 (2024) . |
| APA | Gong, Yuexuan , Ma, Guoyuan , Xu, Shuxue , Wang, Lei . Experimental study on heat pump system with wire-and-tube heat exchange terminal . | THERMAL SCIENCE AND ENGINEERING PROGRESS , 2024 , 54 . |
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Abstract ：
This paper presents a new design method for turboexpander-compressors used in air refrigeration. As a key component of the reverse Brayton cycle, the efficiency of the turboexpander-compressor significantly has an impact on the overall cycle performance. The expander section is optimized for multi-objective efficiency at different flow rates using the Imperialist Competitive Algorithm to achieve high performance across all operating conditions. Regarding achieving high utilization efficiency for output power from efficient expanders, the compressor section adopts combined methods involving the jet-wake model and parameter equations. The proposed design is validated through public models, computational fluid dynamics simulations and experiments. Simulations and analysis are conducted on test cases representing comprehensive operational scenarios for both the compressor and the expander, confirming that conclusions drawn based on this method align well with underlying theoretical principles. At the design mass flow, the expander efficiency is 89%, and the compressor utilizes the output power of the expander with an efficiency of 90%. Near the design flow, the expander efficiency is more than 85%, and the compressor utilizes the output power of the expander with an efficiency exceeding 80%. This paper presents a method for turboexpander-compressors applicable to air refrigeration cycles, which achieves a reduction in design costs and an improvement in efficiency under varying loads.
Keyword ：
Multi -objective optimization Multi -objective optimization Turboexpander-compressor Turboexpander-compressor reverse Brayton cycle reverse Brayton cycle
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| GB/T 7714 | Tian, Yu , Ma, Guoyuan , Wang, Lei et al. A design method of turboexpander-compressors based on multi-objective optimization applied to reverse brayton cycle [J]. | APPLIED THERMAL ENGINEERING , 2024 , 254 . |
| MLA | Tian, Yu et al. "A design method of turboexpander-compressors based on multi-objective optimization applied to reverse brayton cycle" . | APPLIED THERMAL ENGINEERING 254 (2024) . |
| APA | Tian, Yu , Ma, Guoyuan , Wang, Lei , Rong, Weilai , Wu, Junfeng . A design method of turboexpander-compressors based on multi-objective optimization applied to reverse brayton cycle . | APPLIED THERMAL ENGINEERING , 2024 , 254 . |
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Abstract ：
Efficient cooling of the trans-critical CO2 vapor compression cycle to improve system performance is a crucial research topic. This paper proposes an innovative approach called distribution compression (DC) to achieve the same effect as subcooling in a trans-critical CO2 thermodynamic cycle. In the DC system, the trans-critical CO2 at the gas cooler outlet is no longer further cooled but subjected to a secondary pressure boost and releases heat in ordinary heat sink conditions as in the gas cooler. Thermodynamics calculated the change in performance of the DC system under different working conditions with different secondary boost ratios. The optimal secondary boost ratio related to evaporation and gas cooler outlet temperatures under optimal discharge pressure based on the baseline system was obtained. The results show that compared with the baseline system, the DC system can effectively improve the system performance, and the maximum refrigeration COP increase is between 8.2 % -10.76 %, and the maximum heating COP increase is between 5.37 % -6.34 %. The cooling or heating capacity increase can reach up to about 26 %. The ideal secondary boost ratio in a DC system is not highly demanding, and the increased input power for the second input power for the secondary boost will not exceed 20 % relative to the baseline system. Comparing the COP of the DC system over current systems that only use a single subcooling technology still shows advantages. The DC system provides a new idea to improve the performance of the transcritical CO2 vapor compression cycle.
Keyword ：
CO2 CO2 Heating Heating Trans-critical cycle Trans-critical cycle Distributed compression Distributed compression Refrigeration Refrigeration Subcooling Subcooling
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| GB/T 7714 | Wang, Lei , Zhang, Yumei , Ma, Guoyuan . Theoretical investigation of a novel distributed compression cycle for CO2 trans-critical system [J]. | ENERGY AND BUILDINGS , 2023 , 304 . |
| MLA | Wang, Lei et al. "Theoretical investigation of a novel distributed compression cycle for CO2 trans-critical system" . | ENERGY AND BUILDINGS 304 (2023) . |
| APA | Wang, Lei , Zhang, Yumei , Ma, Guoyuan . Theoretical investigation of a novel distributed compression cycle for CO2 trans-critical system . | ENERGY AND BUILDINGS , 2023 , 304 . |
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Abstract ：
本实用新型公开了热泵型换气热回收与空气处理集成系统，包括热泵系统a、热泵系统b、换气热回收设备，以及相互隔离的排风道和新风道，换气热回收设备置于相互隔离排风道和新风道之中，在热回收设备下游的排风道中依次布置有热泵系统a排风换热器和热泵系统b排风换热器，在其下游的新风道中依次布置有第一新风换热器和新风换热器，热泵系统b室内换热器和室外换热器分别置于室内侧和室外侧，相互独立的热泵系统a和b的密闭回路均按次序相互复合在一起；通过不同设备或/和阀门的通/断组合，可转换出多种工作模式。
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| GB/T 7714 | 马国远 , 李想 , 许树学 et al. 热泵型换气热回收与空气处理集成系统 : CN202320891534.2[P]. | 2023-04-20 . |
| MLA | 马国远 et al. "热泵型换气热回收与空气处理集成系统" : CN202320891534.2. | 2023-04-20 . |
| APA | 马国远 , 李想 , 许树学 , 李富平 . 热泵型换气热回收与空气处理集成系统 : CN202320891534.2. | 2023-04-20 . |
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Abstract ：
本发明公开了一种热泵型换气热回收与空气处理集成系统，包括热泵系统a、热泵系统b、换气热回收设备，以及相互隔离的排风道和新风道，换气热回收设备置于相互隔离排风道和新风道之中，在热回收设备下游的排风道中依次布置有热泵系统a排风换热器和热泵系统b排风换热器，在其下游的新风道中依次布置有第一新风换热器和新风换热器，热泵系统b室内换热器和室外换热器分别置于室内侧和室外侧，相互独立的热泵系统a和b的密闭回路均按次序相互复合在一起；通过不同设备或/和阀门的通/断组合，可转换出多种工作模式。
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| GB/T 7714 | 马国远 , 李想 , 许树学 et al. 一种热泵型换气热回收与空气处理集成系统 : CN202310425030.6[P]. | 2023-04-20 . |
| MLA | 马国远 et al. "一种热泵型换气热回收与空气处理集成系统" : CN202310425030.6. | 2023-04-20 . |
| APA | 马国远 , 李想 , 许树学 , 李富平 . 一种热泵型换气热回收与空气处理集成系统 : CN202310425030.6. | 2023-04-20 . |
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Abstract ：
本发明涉及制冷技术领域，提供一种分布式压缩制冷系统，包括依次相连的压缩机、冷凝器、增压装置、冷却器、节流装置和蒸发器组成的冷却回路，制冷工质在冷却回路中循环流动，增压装置适于对制冷工质进行二次增压，冷却器适于对二次增压后的制冷工质进行二次冷却，流入增压装置的制冷工质的状态为饱和液态、过冷液态或超临界态中的一种。通过二次增压和二次冷却过程，改变了节流前的制冷工质状态，在原有的热汇环境不变的前提下实现工质的二次放热，利用制冷工质的温度压力特性关系，在最终冷却温度与传统系统形式基本相同的条件下，利用高压力下节流近似等焓的过程，使工质在节流后获得更低的干度，提高单位质量制冷量，提升系统制冷能效。
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| GB/T 7714 | 王磊 , 马国远 , 张玉梅 . 分布式压缩制冷系统 : CN202310414695.7[P]. | 2023-04-18 . |
| MLA | 王磊 et al. "分布式压缩制冷系统" : CN202310414695.7. | 2023-04-18 . |
| APA | 王磊 , 马国远 , 张玉梅 . 分布式压缩制冷系统 : CN202310414695.7. | 2023-04-18 . |
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Abstract ：
本发明公开了一种蒸汽喷射器及喷射方法，属于蒸汽喷射器技术领域，包括从左往右依次连通的接受室、混合室和扩压室；所述接受室入口端设有喷嘴，所述接受室下方设有引射流体通道；所述混合室包括渐缩段以及连接于所述渐缩段右端的喉部段；所述渐缩段为中空圆柱状；所述渐缩段入口端下方设有引流槽，所述引流槽用于存储蒸汽在运动过程中因相变所产生的凝结液；所述引流槽下方设有排水孔；所述排水孔上配合有调节组件，所述调节组件用于排出引流槽中积存的凝结液。本发明能有效改善解决现有蒸汽喷射器混合室入口处因积液导致引射性能下降等问题。
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| GB/T 7714 | 周峰 , 李东哲 , 马国远 . 一种蒸汽喷射器及喷射方法 : CN202310995125.1[P]. | 2023-08-09 . |
| MLA | 周峰 et al. "一种蒸汽喷射器及喷射方法" : CN202310995125.1. | 2023-08-09 . |
| APA | 周峰 , 李东哲 , 马国远 . 一种蒸汽喷射器及喷射方法 : CN202310995125.1. | 2023-08-09 . |
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Abstract ：
本发明公开了一种双吸气活塞压缩机及其制冷系统，双吸气活塞压缩机主要部件包括汽缸、吸气阀、排气阀、活塞、曲柄连杆，以及辅助吸气孔。制冷系统包括双吸气活塞压缩机、冷凝器、冷藏毛细管、冷藏室换热器、冷冻毛细管、冷冻室换热器。在冰箱用活塞压缩机上开设补气孔，单个电机带动同一压缩缸形成了2个不同的吸气压力(温度)。通过合理配置毛细管的长度和冷冻室、冷藏室换热面积，即可使系统正常运行。冷藏室的吸气以补气的形式从辅助吸气孔进入到压缩机中间腔内，压差的作用下能够保证冷藏室进气量(约为1.2‑1.4倍的冷冻室进气量)；同时，低焓值的制冷剂补充到压缩过程，能提高压缩过程效率5％以上，降低排气温度10℃以上，整体能效提升10％左右。
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| GB/T 7714 | 许树学 , 魏晨希 , 马国远 . 一种双吸气活塞压缩机及其制冷系统 : CN202310430763.9[P]. | 2023-04-20 . |
| MLA | 许树学 et al. "一种双吸气活塞压缩机及其制冷系统" : CN202310430763.9. | 2023-04-20 . |
| APA | 许树学 , 魏晨希 , 马国远 . 一种双吸气活塞压缩机及其制冷系统 : CN202310430763.9. | 2023-04-20 . |
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Abstract ：
In order to improve the cooling and dehumidification performance of household air conditioners, a new air conditioning system with double evaporation temperature is proposed. The simulation model of the new system is established, the variation of system performance with compressor high/low pressure cylinder volume ratio, inlet air temperature, relative humidity, air speed, etc. are simulated and experimentally studied. The research results show that when the volume ratio of high and low pressure cylinders of compressor is 0.5 similar to 1.2 and air speed 2.2 m/s, cooling COP of double evaporation temperature air conditioning system could obtain the maximum value. Compared with single evaporation temperature system, cooling COP of double evaporation temperature system can be increased 3%similar to 4.2%; the dehumidification capacity is 0.06 similar to 0.61 kg/h, about 1.69% similar to 5.83% higher.
Keyword ：
Double evaporation Double evaporation Air conditioning Air conditioning Cooling COP Cooling COP Dehumidification Dehumidification
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| GB/T 7714 | Shuxue, Xu , Jianhui, Niu , Hongxia, Ma et al. Cooling and dehumidification performance study of a new air conditioning system with double evaporation temperature [J]. | ENERGY AND BUILDINGS , 2023 , 295 . |
| MLA | Shuxue, Xu et al. "Cooling and dehumidification performance study of a new air conditioning system with double evaporation temperature" . | ENERGY AND BUILDINGS 295 (2023) . |
| APA | Shuxue, Xu , Jianhui, Niu , Hongxia, Ma , Guoyuan, Ma . Cooling and dehumidification performance study of a new air conditioning system with double evaporation temperature . | ENERGY AND BUILDINGS , 2023 , 295 . |
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Abstract ：
Free cooling technology can effectively reduce the cooling energy consumption of data centers, but its energy efficiency is greatly affected by regional and meteorological conditions. This study investigates the liquid-pumpdriven free cooling/mechanical refrigeration hybrid cooling system of a data center with 40 racks through a demonstration case and tests. The annual hourly energy efficiency in 20 subclimate zones and 37 typical cities in China of the hybrid cooling system designed with 5 and 10 degrees C temperature differences was analyzed with different meteorological parameters. The annual power usage effectiveness (PUE) values corresponding to the energy efficiency ratio (EER) in different regions were presented. Results showed that the annual average EER of the liquid-pump-driven free cooling mode was 7.07-14.18, and the annual average EER of the hybrid system was 4.22-14.10 when the temperature difference was 5 degrees C. The annual average EER range and the design temperature difference of the hybrid system for different climate regions were recommended. The PUE values of other regions, except for Guangzhou and Haikou, were lower than 1.40. The results provide references for the EER and PUE of the hybrid system in different climate regions.
Keyword ：
Data center free cooling Data center free cooling PUE PUE Climate zone Climate zone Liquid-pump-driven hybrid system Liquid-pump-driven hybrid system EER EER
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| GB/T 7714 | Zhou, Feng , Shen, Chaoya , Ma, Guoyuan et al. Power usage effectiveness analysis of a liquid-pump-driven hybrid cooling system for data centers in subclimate zones [J]. | SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS , 2022 , 52 . |
| MLA | Zhou, Feng et al. "Power usage effectiveness analysis of a liquid-pump-driven hybrid cooling system for data centers in subclimate zones" . | SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS 52 (2022) . |
| APA | Zhou, Feng , Shen, Chaoya , Ma, Guoyuan , Yan, Xianghui . Power usage effectiveness analysis of a liquid-pump-driven hybrid cooling system for data centers in subclimate zones . | SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS , 2022 , 52 . |
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