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A small-scale silica gel-water adsorption system for domestic air conditioning and water heating by the

Y. YU, Q. W. PAN, L. W. WANG

《能源前沿（英文）》 2020年 第14卷 第2期   页码 328-336 doi: 10.1007/s11708-019-0623-1

摘要： A small-scale silica gel-water adsorption system with modular adsorber, which utilizes solar energy to achieve the cogeneration of domestic air conditioning and water heating effect, is proposed and investigated in this paper. A heat recovery process between two adsorbers and a mass recovery process between two evaporators are adopted to improve the overall cooling and heating performance. First, the adsorption system is tested under different modes (different mass recovery, heat recovery, and cogeneration time) to determine the optimal operating conditions. Then, the cogeneration performance of domestic cooling and water heating effect is studied at different heat transfer fluid temperatures. The results show that the optimal time for cogeneration, mass recovery, and heat recovery are 600 s, 40 s, and 40 s, respectively. When the inlet temperature of hot water is around 85°C, the largest cooling power and heating power are 8.25 kW and 21.94 kW, respectively. Under the condition of cooling water temperature of 35°C, the obtained maximum COP , COP , and SCP of the system are 0.59, 1.39, and 184.5 W/kg, respectively.

关键词： silica gel-water     heat and mass recovery     solar energy     domestic cooling and heating    

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A state-of-the-art review of solar passive building system for heating or cooling purpose

Arun Kumar NANDA,C K PANIGRAHI

《能源前沿（英文）》 2016年 第10卷 第3期   页码 347-354 doi: 10.1007/s11708-016-0403-0

摘要： The major portion of energy in a building is consumed by heating, ventilating, and air-conditioning (HVAC). The traditional heating and cooling systems contribute greatly to the emission of greenhouse gases, especially carbon dioxide. Four different ways, i.e., Trombe wall, solar chimney, unglazed transpired solar façade, and solar roof, are adopted for solar heating. Similarly, two major ways, i.e., evaporative cooling and building integrated evaporative cooling are adopted for cooling of the building. Therefore, an attempt has been made in this paper to compile the developments of solar heating and cooling technologies in a building.

关键词： HVAC     heating     cooling     solar heating     carbon dioxide (CO2) emissions    

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A concept of capillary active, dynamic insulation integrated with heating, cooling and ventilation, air

Mark BOMBERG

《结构与土木工程前沿（英文）》 2010年 第4卷 第4期   页码 431-437 doi: 10.1007/s11709-010-0071-9

摘要： When a historic fa?ade needs to be preserved or when the seismic considerations favor use of a concrete wall system and fire considerations limit exterior thermal insulation, one needs to use interior thermal insulation systems. Interior thermal insulation systems are less effective than the exterior systems and will not reduce the effect of thermal bridges. Yet they may be successfully used and, in many instances, are recommended as a complement to the exterior insulation. This paper presents one of these cases. It is focused on the most successful applications of capillary active, dynamic interior thermal insulation. This happens when such insulation is integrated with heating, cooling and ventilation, air conditioning (HVAC) system. Starting with a pioneering work of the Technical University in Dresden in development of capillary active interior insulations, we propose a next generation, namely, a bio-fiber thermal insulation. When completing the review, this paper proposes a concept of a joint research project to be undertaken by partners from the US (where improvement of indoor climate in exposed coastal areas is needed), China (indoor climate in non-air conditioned concrete buildings is an issue), and Germany (where the bio-fiber technology has been developed).

关键词： capillary active insulation     integrated heating     cooling and ventilation     air conditioning (HVAC) and building enclosure     dynamic insulation     switchable thermal resistance     variable U-value walls    

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A comprehensive energy solution for households employing a micro combined cooling, heating and power

Huayi ZHANG, Can ZHANG, Fushuan WEN, Yan XU

《能源前沿（英文）》 2018年 第12卷 第4期   页码 582-590 doi: 10.1007/s11708-018-0592-9

摘要：

In recent years, micro combined cooling, heating and power generation (mCCHP) systems have attracted much attention in the energy demand side sector. The input energy of a mCCHP system is natural gas, while the outputs include heating, cooling and electricity energy. The mCCHP system is deemed as a possible solution for households with multiple energy demands. Given this background, a mCCHP based comprehensive energy solution for households is proposed in this paper. First, the mathematical model of a home energy hub (HEH) is presented to describe the inputs, outputs, conversion and consumption process of multiple energies in households. Then, electrical loads and thermal demands are classified and modeled in detail, and the coordination and complementation between electricity and natural gas are studied. Afterwards, the concept of thermal comfort is introduced and a robust optimization model for HEH is developed considering electricity price uncertainties. Finally, a household using a mCCHP as the energy conversion device is studied. The simulation results show that the comprehensive energy solution proposed in this work can realize multiple kinds of energy supplies for households with the minimized total energy cost.

关键词： energy hub     micro combined cooling     heating and power generation (mCCHP)     thermal comfort     robust optimization    

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Efficient use of waste heat and solar energy: Technologies of cooling, heating, power generation and

Ya-Ling HE, Ruzhu WANG, Anthony Paul ROSKILLY, Peiwen LI

《能源前沿（英文）》 2017年 第11卷 第4期   页码 411-413 doi: 10.1007/s11708-017-0525-z

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Energy efficiency of small buildings with smart cooling system in the summer

Yazdan DANESHVAR, Majid SABZEHPARVAR, Seyed Amir Hossein HASHEMI

《能源前沿（英文）》 2022年 第16卷 第4期   页码 651-660 doi: 10.1007/s11708-020-0699-7

摘要： In this paper, a novel cooling control strategy as part of the smart energy system that can balance thermal comfort against building energy consumption by using the sensing and machine programming technology was investigated. For this goal, a general form of a building was coupled by the smart cooling system (SCS) and the consumption of energy with thermal comfort cooling of persons simulated by using the EnergyPlus software and compared with similar buildings without SCS. At the beginning of the research, using the data from a survey in a randomly selected group of hundreds and by analyzing and verifying the results of the specific relationship between the different groups of people in the statistical society, the body mass index (BMI) and their thermal comfort temperature were obtained, and the sample building was modeled using the EnergyPlus software. The result show that if an intelligent ventilation system that can calculate the thermal comfort temperature was used in accordance with the BMI of persons, it can save up to 35% of the cooling load of the building yearly.

关键词： smart home     heating and cooling systems     saving energy     optimal consumption of energy    

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evaluation of an improved biomass-fired cogeneration system simultaneously using extraction steam, coolingwater, and feedwater for heating

《能源前沿（英文）》 2022年 第16卷 第2期   页码 321-335 doi: 10.1007/s11708-021-0741-4

摘要： An advanced cogeneration system based on biomass direct combustion was developed and its feasibility was demonstrated. In place of the traditional single heat source (extraction steam), the extraction steam from the turbine, the cooling water from the plant condenser, and the low-pressure feedwater from the feedwater preheating system were collectively used for producing district heat in the new scheme. Hence, a remarkable energy-saving effect could be achieved, improving the overall efficiency of the cogeneration system. The thermodynamic and economic performance of the novel system was examined when taking a 35 MW biomass-fired cogeneration unit for case study. Once the biomass feed rate and net thermal production remain constant, an increment of 1.36 MW can be expected in the net electric production, because of the recommended upgrading. Consequently, the total system efficiency and effective electrical efficiency augmented by 1.23 and 1.50 percentage points. The inherent mechanism of performance enhancement was investigated from the energy and exergy aspects. The economic study indicates that the dynamic payback period of the retrofitting project is merely 1.20 years, with a net present value of 5796.0 k$. In conclusion, the proposed concept is validated to be advantageous and profitable.

关键词： biomass-fired cogeneration     district heat production system     absorption heat pump     extraction steam     cooling water     low-pressure feedwater    

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An invariant descriptor for conjugate forced convection-conduction cooling of 3D protruding heaters in

Thiago ANTONINI ALVES,Paulo H. D. SANTOS,Murilo A. BARBUR

《机械工程前沿（英文）》 2015年 第10卷 第3期   页码 263-276 doi: 10.1007/s11465-015-0345-y

摘要：

In this research, the temperatures of three-dimensional (3D) protruding heaters mounted on a conductive substrate in a horizontal rectangular channel with laminar airflow are related to the independent power dissipation in each heater by using a matrix G+ with invariant coefficients, which are dimensionless. These coefficients are defined in this study as the conjugate influence coefficients (g+) caused by the forced convection-conduction nature of the heaters’ cooling process. The temperature increase of each heater in the channel is quantified to clearly identify the contributions attributed to the self-heating and power dissipation in the other heaters (both upstream and downstream). The conjugate coefficients are invariant with the heat generation rate in the array of heaters when assuming a defined geometry, invariable fluid and flow rate, and constant substrate and heater conductivities. The results are numerically obtained by considering three 3D protruding heaters on a two-dimensional (2D) array by ANSYS/FluentTM 15.0 software. The conservation equations are solved by a coupled procedure within a single calculation domain comprising of solid and fluid regions and by considering a steady state laminar airflow with constant properties. Some examples are shown, indicating the effects of substrate thermal conductivity and Reynolds number on conjugate influence coefficients.

关键词： channel flow     conjugate forced convection-conduction cooling     conjugate influence coefficients     discrete heating     invariant descriptor     thermal management    

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一些金属材料的称重为何升温后减轻降温后变重

范良藻

《中国工程科学》 2007年 第9卷 第11期   页码 96-96

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Active-reactive power scheduling of integrated electricity-gas network with multi-microgrids

《能源前沿（英文）》 2023年 第17卷 第2期   页码 251-265 doi: 10.1007/s11708-022-0857-1

摘要： Advances in natural gas-fired technologies have deepened the coupling between electricity and gas networks, promoting the development of the integrated electricity-gas network (IEGN) and strengthening the interaction between the active-reactive power flow in the power distribution network (PDN) and the natural gas flow in the gas distribution network (GDN). This paper proposes a day-ahead active-reactive power scheduling model for the IEGN with multi-microgrids (MMGs) to minimize the total operating cost. Through the tight coupling relationship between the subsystems of the IEGN, the potentialities of the IEGN with MMGs toward multi-energy cooperative interaction is optimized. Important component models are elaborated in the PDN, GDN, and coupled MMGs. Besides, motivated by the non-negligible impact of the reactive power, optimal inverter dispatch (OID) is considered to optimize the active and reactive power capabilities of the inverters of distributed generators. Further, a second-order cone (SOC) relaxation technology is utilized to transform the proposed active-reactive power scheduling model into a convex optimization problem that the commercial solver can directly solve. A test system consisting of an IEEE-33 test system and a 7-node natural gas network is adopted to verify the effectiveness of the proposed scheduling method. The results show that the proposed scheduling method can effectively reduce the power losses of the PDN in the IEGN by 9.86%, increase the flexibility of the joint operation of the subsystems of the IEGN, reduce the total operation costs by $32.20, and effectively enhance the operation economy of the IEGN.

关键词： combined cooling     heating     and power (CCHP)     integrated energy systems (IES)     natural gas     power distribution system     gas distribution system    

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冷热电联产系统中气冷式微型透平机的发电耗水、空气污染物排放及成本影响：亚特兰大地区案例研究 Article

Jean-Ann James, Valerie M. Thomas, Arka Pandit, Duo Li, John C. Crittenden

《工程（英文）》 2016年 第2卷 第4期   页码 470-480 doi: 10.1016/J.ENG.2016.04.008

摘要：

城市化进程的加快意味着城市和国际组织需要去寻找各种能够提高能源效率和减少空气中污染物排放的方法。冷热电联产(CCHP) 系统可以同时供暖、制冷和发电，具有提高城市或城市区域能源发电效率的潜力。本研究的目的是在满足建筑热需求(供热和制冷) 的各种运行条件下，对亚特兰大大都市区内的五种常见建筑类型在采用CCHP 系统时的发电耗水、CO2 和NOx 排放，及其经济性进行评价。对于大多数采用或不采用净计量策略的建筑类型来说，以满足每小时热需求去运行CCHP 系统均可减少CO2 的排放量。该系统能否对这些建筑类型产生经济效益，主要取决于天然气的价格、净计量策略的采用和假定的CCHP 系统的成本结构。当建筑物采用净计量策略并且CCHP 系统是以满足建筑物每年的最大热需求而运行时，CCHP 系统的发电耗水量和NOx 的排放量均有最大限度的减少，尽管此时该运行情景会增加温室气体排放和发电成本。CCHP 系统对中型办公楼、大型办公楼和多户型住宅建筑更经济、实用。

关键词： 冷热电联产（CCHP）     气冷式微型透平机     分布式能源发电     发电耗水     净计量    

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Status of domestic gasification technology in China

Zhimin HUANG , Jiansheng ZHANG , Guangxi YUE ,

《能源前沿（英文）》 2009年 第3卷 第3期   页码 330-336 doi: 10.1007/s11708-009-0021-1

摘要： Five domestic gasification technologies in China were presented and reviewed, including opposed multi-burner (OMB) gasification technology of coal water slurry (CWS), oxygen staged gasification technology, two-stage dry feed entrained flow gasification, pulverized coal gasification process of HT-L, and ash agglomerating fluidized bed gasification. The former four technologies belong to pressurized entrained flow gasification technology. The process description, technology characteristics, research and development process, performance indexes and commercialization progress of these technologies were mainly discussed.

关键词： domestic gasification technology     research and development     performance     commercialization    

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Partial anammox achieved in full scale biofilm process for typical domestic wastewater treatment

《环境科学与工程前沿（英文）》 2022年 第16卷 第3期 doi: 10.1007/s11783-021-1467-6

摘要：

• A full scale biofilm process was developed for typical domestic wastewater treatment.

关键词： Full scale     Anammox     Domestic wastewater     Biofilm     Candidatus Brocadia    

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Advances in genetic engineering of domestic animals

Shaohua WANG,Kun ZHANG,Yunping DAI

《农业科学与工程前沿（英文）》 2016年 第3卷 第1期   页码 1-10 doi: 10.15302/J-FASE-2016085

摘要： Global population will increase to over nine billion by 2050 with the doubling in demand for meat and milk. To overcome this challenge, it is necessary to breed highly efficient and productive livestock. Furthermore, livestock are also excellent models for human diseases and ideal bioreactors to produce pharmaceutical proteins. Thus, genetic engineering of domestic animals presents a critical and valuable tool to address these agricultural and biomedical applications. Overall, genetic engineering has evolved through three stages in history: transgenesis, gene targeting, and gene editing. Since the birth of the first transgenic pig, genetic engineering in livestock has been advancing slowly due to inherent technical limitations. A major breakthrough has been the advent of somatic cell nuclear transfer, which, for the first time, provided the technical ability to produce site-specific genome-modified domestic animals. However, the low efficiency of gene targeting events in somatic cells prohibits its wide use in agricultural and biomedical applications. Recently, rapid progress in tools and methods of genome engineering has been made, allowing genetic editing from mutation of a single base pair to the deletion of entire chromosomes. Here, we review the major advances of genetic engineering in domestic animals with emphasis placed on the introduction of latest designer nucleases.

关键词： CRISPR     TALEN     ZFN     gene editing     livestock     pig     cattle    

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Optimization of phosphorus removal in uniFed SBR system for domestic wastewater treatment

Xuguang TANG, Shuying WANG, Yongzhen PENG

《环境科学与工程前沿（英文）》 2010年 第4卷 第4期   页码 475-481 doi: 10.1007/s11783-010-0244-8

摘要： The characteristic of phosphorus removal and appropriate change of the traditional operation modes were investigated in UniFed sequencing batch reactor (SBR) laboratory-scale apparatus (40 L), treating actual domestic wastewater with low ratios of C/N (2.57) and C/P (30.18), providing theoretical basis for actual application of wastewater treatment plant. UniFed SBR system with its unique operation mode had the distinct superiority of phosphorus removal. On this occasion, the effect of volumetric exchange ratio (VER) and the method of influent introduction for phosphorus removal were studied. When the carbon source became the limiting factor to phosphorus release, the higher the VER, the lower the phosphorus concentration in the effluent. Three different influent patterns, including one-time filling, four-time filling, and continuous filling with the same quantity of wastewater could increase the release rate of anaerobic phosphorus from 0.082 to 0.143 mg·P·(L·min) . Appropriate change of the traditional operation modes could optimize the efficiency of phosphorus removal. When the feed/ decant time was extended from 2 h to 4 h, the phosphorous removal efficiency increased from 59.93% to 88.45% without any external carbon source. In the mode of alternation of anoxic-aerobic (A/O) condition, phosphorous removal efficiency increased from 55.07% to 72.27% clearly. The carbon source in the influent can be used adequately, and denitrifying phosphorus removal was carried out in anoxic stage 2 (A2). This mode was optimal for the treatment of actual domestic wastewater with low C/N and C/P ratios.

关键词： UniFed sequencing batch reactor (SBR)     phosphorus removal     volumetric exchange ratio (VER)     alternation of anoxic-aerobic (A/O)     domestic wastewater    

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标题 作者 时间 类型 操作

A small-scale silica gel-water adsorption system for domestic air conditioning and water heating by the

Y. YU, Q. W. PAN, L. W. WANG

期刊论文

A state-of-the-art review of solar passive building system for heating or cooling purpose

Arun Kumar NANDA,C K PANIGRAHI

期刊论文

A concept of capillary active, dynamic insulation integrated with heating, cooling and ventilation, air

Mark BOMBERG

期刊论文

A comprehensive energy solution for households employing a micro combined cooling, heating and power

Huayi ZHANG, Can ZHANG, Fushuan WEN, Yan XU

期刊论文

Efficient use of waste heat and solar energy: Technologies of cooling, heating, power generation and

Ya-Ling HE, Ruzhu WANG, Anthony Paul ROSKILLY, Peiwen LI

期刊论文

Energy efficiency of small buildings with smart cooling system in the summer

Yazdan DANESHVAR, Majid SABZEHPARVAR, Seyed Amir Hossein HASHEMI

期刊论文

evaluation of an improved biomass-fired cogeneration system simultaneously using extraction steam, coolingwater, and feedwater for heating

期刊论文

An invariant descriptor for conjugate forced convection-conduction cooling of 3D protruding heaters in

Thiago ANTONINI ALVES,Paulo H. D. SANTOS,Murilo A. BARBUR

期刊论文

一些金属材料的称重为何升温后减轻降温后变重

范良藻

期刊论文

Active-reactive power scheduling of integrated electricity-gas network with multi-microgrids

期刊论文

冷热电联产系统中气冷式微型透平机的发电耗水、空气污染物排放及成本影响：亚特兰大地区案例研究

Jean-Ann James, Valerie M. Thomas, Arka Pandit, Duo Li, John C. Crittenden

期刊论文

Status of domestic gasification technology in China

Zhimin HUANG , Jiansheng ZHANG , Guangxi YUE ,

期刊论文

Partial anammox achieved in full scale biofilm process for typical domestic wastewater treatment

期刊论文

Advances in genetic engineering of domestic animals

Shaohua WANG,Kun ZHANG,Yunping DAI

期刊论文

Optimization of phosphorus removal in uniFed SBR system for domestic wastewater treatment

Xuguang TANG, Shuying WANG, Yongzhen PENG

期刊论文