EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
·
2015
·Vol. 118
·期 4
·584-591
·
IF 1.812
Xiuhang Chai,Yanlan Bi,Shangde Sun
Gossypol is a highly reactive compound present in cotton plant ( Gossypium spp.). With the increase of heating temperature and time, gossypol losses increased significantly. In this work, the effect of free fatty acid (FFA) and peroxide value (PV) of soybean oil (SBO) on gossypol losses during heating was systematically studied. Results showed that the higher the content of FFAs of SBO at 120 or 180°C, the greater the gossypol losses. The HPLC and LC/MS analysis suggested that the increase of gossypol losses in SBO was due to the transformation of gossypol in the presence of FFAs at 120 or 180°C. The PV also had an observable effect on gossypol losses at 120 or 180°C, which was ascribed to be the transformation or oxidation of gossypol with hydroperoxides. Practical applications: Due to the toxicity of gossypol, the use of cottonseed oil and cottonseed meal is restricted. It is significantly meaningful to remove gossypol. The primary objective of this study was to investigate the effect of heating temperature and oil quality (AV and PV of oil) on gossypol losses in SBO during heating. More information about the changes of gossypol in oil was achieved, which could be used to guide the processing of cottonseed oil and cottonseed meal. At the same time, the mechanism of gossypol changes could be used to get high quality gossypol. The losses of gossypol in SBO were primarily due to the increasing transformation of gossypol under heating system. Gossypol was non-volatile and the higher the AV and PV of SBO, the more loss of the gossypol.
研究领域:
食品科学
·
植物化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED THERMAL ENGINEERING
·
2022
·
IF 6.465
Haoran Li,Shiming Wang,Zhe Yan,Xiaojuan Niu,Xinri Sun,Wenpeng Hong
The solar-driven interfacial water evaporation technique enables to sustainably produce potable water from sewage, wastewater, and seawater. Limited by the advanced functional materials and structures, however, the contradiction between high evaporation rate and low heat loss needs to be further optimized in terms of improving energy efficiency. Herein, a two-dimensional solar absorber in which the vertical substrate pumps water to the top surface for sustainable evaporation and reducing heat conduction channels between the evaporation surface and the bulk water is introduced. In addition, the surplus heat of the solar absorber is directly and quickly conducted to a thermoelectric device for electricity generation. This configuration endows the hybrid device with a power density of 1.2 W m −2 at an external resistance of 4 Ω together with an evaporation rate of 4.51 kg m −2 h −1 at 4 suns illumination. Importantly, both the fast response of the hybrid device to the optical concentration and the repeatability of the output current are well supported. Such a hybrid device provides an opportunity to construct an on-site and/or off-network water treatment system with low energy consumption and trade investment.
研究领域:
能源科学
·
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2023
·
IF 5.2
Jingrui Lan,Haoran Li,Xiaoyi Liu,Shiming Wang,Wenpeng Hong
Solar-driven interfacial water evaporation (SIWE) is an important strategy for addressing the world's freshwater shortage. However, the traditional evaporator typically localizes the heat to the evaporation interface. This would increase the radiative heat loss between the evaporator and the environment, resulting in a reduction in the evaporation rate. Herein, a water-energy-balanced evaporator (WEBE) is proposed by accurately adjusting the thickness of the solar absorber. The excess energy is transferred downward to preheat the water, which will be transported to the evaporation interface, instead of being dissipated to the environment. In addition, a unique T-shaped water path is introduced to reduce the contact area between the evaporation interface and the bulk water. These allow the WEBE to decrease the conductive and radiative heat losses by 16.4% in total. Importantly, the WEBE demonstrates a superior evaporation rate due to efficient thermal management and water-energy balance. Under 1 sun (at a solar flux of q = 1 kW m −2 ) illumination, the evaporation rate reaches 2.02 kg m −2 h −1 , which is 1.21 times of the traditional evaporator. This work provides a novel and accessible approach to further increase direct solar vapor productivity for solar desalination.
研究领域:
能源科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2019
·
IF 4.674
Gong Cheng,Xinzhi Wang,Xing Liu,Yurong He,Boris V. Balakin
Solar steam generation, as a high efficiency photo-thermal conversion method, has enormous potential for many industrial applications. In this work, a reduced graphene oxide (rGO) composite membrane with high light absorption was prepared to enhance the steam generation of water successfully. Through different experimental tests, the evaporation rate and efficiency reached 0.9 kg·h −1 ·m −2 and 45.1% at 1 sun, even with a small amount of rGO (0.76 g/m 2 ). Furthermore, a simple composite enhanced system (CES) based on the rGO composite membrane was fabricated to further improve the evaporation efficiency. The evaporation rate and efficiency reached 1.37 kg·h −1 ·m −2 and 85.6% at 1 sun when the same amount of rGO was used in our novel CES. This was due to the decrease in the thermal conductivity and capillary enhancement of the supply water. Comparing the different methods of steam generation, it was observed that the evaporation efficiency of CES was higher than that of other systems, due to the decreased thermal loss. Finally, an integrated distillation and power generation device was assembled to demonstrate the practical application of CES and it exhibited great performance. It was of great significance for large-scale steam generation in distillation, sewage treatment, and other applications.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Bo Wu,Wei Wei,Yang Guo,Weng Hou Yip,Beng Kang Tay,Chengyi Hou,Qinghong Zhang,Yaogang Li,Hongzhi Wang
Flexible thermoelectric generators can directly convert body heat into electricity to power wearable electronics, which is recognized as a potential candidate for durable energy supply. Nevertheless, the parasitic heat loss and inadequate waterproofing have greatly limited its practical application. Here we propose a compliant engineering solution for encapsulated thermoelectric generators that ensures sufficient alignment of thermal gradient based on infrared reflection effect, which realized both the increased infrared radiation insulation at hot end and the reduced radiation heating of cold end. It contributes to a remarkable increase in temperature difference as compared to the unencapsulated one when subjected to a same heat source, presenting up to ∼35% increase in voltage output. Owing to waterproof encapsulation, this TE wristband is reliable in a variety of real-life activities such as running and swimming. Moreover, the design concepts of thermoelectric wristband described here can bring new inspiration for realizing body energy harvesting.
研究领域:
材料科学
·
电气工程
·
可穿戴技术
·
热电学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qing Zhao,Dengyu Li,Liyan Zhao,Siyu Zhang,Shengnan Wang,Xuejiao Zhang
Enhancing water convection to dilute surface brine has proven effective in suppressing salt precipitation during interfacial solar evaporation (ISE), but excessive water transport often leads to heat loss. Herein, we develop a zwitterionic poly(sulfobetaine methacrylate) (PSBMA) hydrogel-based ISE system that self-regulates water transport across a wide salinity range. The hydrogel exhibits a tunable swelling ratio and reduced water evaporation enthalpy due to a strong anti-polyelectrolyte effect, enabling efficient water evaporation with minimal thermal loss. Numerical simulations show that the salt-binding capacity of the hydrogel induces a reversed salt concentration gradient, which enhances both water pumping and backward salt diffusion. This mechanism prevents salt accumulation and ensures consistent evaporation. As a result, the system achieves a stable water evaporation rate exceeding 2.0 kg m −2 h −1 across salinities from 0 to 20 wt%, maintaining long-term performance without salt crystallization or structural degradation. This work demonstrates a promising strategy for designing self-adaptive evaporators with both high energy efficiency and excellent salt resistance across varying saline conditions.
研究领域:
可再生能源
·
材料科学
·
环境工程
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 6
·8313-8327
·
IF 4.672
Nianben Zheng,Fang Yan,Long Wang,Zhiqiang Sun
Summary Solar energy is being widely investigated due to its abundant, renewable, and clean features. Photo-thermal conversion in solar collectors is a direct approach for harvesting solar energy. Compared to the commonly used surface-based solar collectors (SSCs), nanofluid-based direct absorption solar collectors (DASCs) are more efficient. In this work, water-based mono MWCNT and hybrid MWCNT-TiN nanofluids were prepared through a two-step method, aiming at light absorption enhancement of nanofluids for applications in DASCs. The optical and photo-thermal conversion performance of the MWCNT nanofluids was firstly evaluated. The results showed that the MWCNT nanofluids presented high solar absorption capability, and the highest photo-thermal conversion efficiency was obtained at 10 ppm. The TiN nanoparticles were subsequently incorporated to form the hybrid MWCNT-TiN nanofluids. The absorption performance of the hybrid nanofluids was further enhanced. The highest efficiency of the hybrid MWCNT-TiN nanofluids was achieved at the TiN mass fraction of 10 ppm, which was about 6.9%, 6.0%, and 3.8% higher than that of the MWCNT nanofluid at 2000, 4000, and 6000 seconds due to the localized surface plasmon resonance (LSPR) effect of TiN nanoparticles. It was also found that the collector efficiency dropped rapidly with the prolonged irradiation time owing to the convection and radiation heat loss at the elevated temperature. Therefore, effective measures should also be taken to reduce heat loss to maintain high photo-thermal conversion efficiency.
研究领域:
太阳能
·
纳米技术
·
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Chao Chang,Peng Tao,Benwei Fu,Jiale Xu,Chengyi Song,Jianbo Wu,Wen Shang,Tao Deng
Solar steam generation is critical for many important solar-thermal applications, but is challenging to achieve under low solar flux due to the large evaporation enthalpy of water. Here, we demonstrate a three-dimensional porous solar-driven interfacial evaporator that can generate 100 °C steam under 1 sun illumination with a record high solar-to-steam conversion efficiency of 48%. The high steam generation efficiency is achieved by localizing solar-thermal heating at the evaporation surface and controlling the water supply onto the porous evaporator through tuning its surface wettability, which prevents overheating of the evaporator and thus minimizes conductive, convective, and radiative heat losses from the evaporator. The design of steam outlet located at the sidewall of the evaporator rather than from the solar absorber surface not only facilitates the collection of generated steam, but also avoids potential blockage of solar radiation by the condensing steam. The high-efficiency solar-driven evaporator has been used to generate hot steam for outdoor removal of paraffin on the wall of oil pipelines, offering a promising solution to mitigate the wax deposition issue in petroleum extraction processes.
研究领域:
材料科学
·
能源工程
·
可再生能源
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Liang Teng,Yimin Xuan,Yun Da,Xianglei Liu,Yulong Ding
The thermochemical energy storage based on Calcium looping (CaL) process shows great potential for the application in the 3 rd generation Concentrated Solar Power (CSP) compared to other high-Temperature heat storage schemes. However, due to the inherent low solar absorptance of CaCO 3 , the surface heating mode is widely adopted in the conventional CaL-CSP system, which causes large thermal resistance and severe radiative heat loss . Herein, we propose achieving direct solar absorption in the CaL-CSP system through enhancing the CaCO 3 ’s ability to capture thermal energy from the concentrated solar irradiation . Efforts are devoted to design and fabricate a modified CaL material by doping CaCO 3 with some materials with high solar absorptance . In order to obtain a highly stable CaL, the cyclic performance of the composite material is investigated and optimized. The calcium gluconate ((Ca(C 6 H 11 O 7 ) 2 )) was used as the precursor while fabricating the porous CaCO 3 , and the Mn–Fe oxides were doped into CaCO 3 through two different doping processes. The experimental results indicate that the proposed material obtains the solar absorptance of ∼90%. The heat release efficiency (equal to carbonation activity) remains over 92% in 60 cycles, which is much higher than that of the commercial CaCO 3 powder (20% after 60 cycles). The proposed calcium-based thermochemical energy storage material is expected to dramatically improve both the solar utilization efficiency and cyclic stability of the integrated CaL-CSP system.
研究领域:
储能技术
·
太阳能
·
材料科学
·
化学工程
·
可再生能源
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）