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1. Effects of pendant side groups on the properties of the silicon-containing arylacetylene resins with 2,5-diphenyl-[1,3,4]-oxadiazole moieties

Author:
Ma, Manping; Liu, Xiaotian; Li, Chuan; Qiao, Zhiyao; Yuan, Qiaolong; Huang, Farong
Source:
RSC advances 2021 v.11 no.32 pp. 19656-19665
ISSN:
2046-2069
Subject:
heat production; heat tolerance,   etc   ; enthalpy;     Show all 3 Subject
Abstract:
... Silicon-containing arylacetylene resins with rigid conjugated structures in the main chain often exhibit poor processability. A strategy of improving the processability by destroying the molecular structure symmetry using side aromatic groups was proposed, and the effects of the side groups was further explored. Two novel structural resins with side aromatic phenyl and phenylacetylene groups (PODS ...
DOI:
10.1039/d1ra02184b

2. A review on energy piles design, evaluation, and optimization

Author:
Mohamad, Zahraa; Fardoun, Farouk; Meftah, Fekri
Source:
Journal of cleaner production 2021 v.292 pp. 125802
ISSN:
0959-6526
Subject:
heat; heat exchangers,   etc   ; concrete; energy;     Show all 4 Subjects
Abstract:
... Integrating heat exchanger pipes with structural foundations in one system has created a new renewable solution for buildings’ thermal loads. However, the interaction between thermal and geotechnical loads makes their design more complex and challenging. This review-study represents the current state of knowledge about the thermal and thermo-mechanical behaviors of energy piles. It also investigat ...
DOI:
10.1016/j.jclepro.2021.125802

3. An air-source hybrid absorption-compression heat pump with large temperature lift

Author:
Gao, J.T.; Xu, Z.Y.; Wang, R.Z.
Source:
Applied energy 2021 v.291 pp. 116810
ISSN:
0306-2619
Subject:
heat exchangers; heat pumps; heat recovery,   etc   ; absorption; air; energy; temperature;     Show all 7 Subjects
Abstract:
... High-temperature heat pump is gaining more and more research attention due to the efficient heat supply for industrial uses, which includes waste heat-source, water-source, and air-source types. Although air heat source has lower energy grade, its superior availability is attractive. However, large temperature lift is necessary to fill in the gap between the low temperature ambient air and high te ...
DOI:
10.1016/j.apenergy.2021.116810

4. Optimal design of variable-path heat exchanger for energy efficiency improvement of air-source heat pump system

Author:
Sim, Jaehoon; Lee, Hyoin; Jeong, Ji Hwan
Source:
Applied energy 2021 v.290 pp. 116741
ISSN:
0306-2619
Subject:
heat exchangers; heat pumps; heat transfer,   etc   ; energy efficiency; mathematical models;     Show all 5 Subjects
Abstract:
... The optimal number of paths for the heat exchanger of an outdoor unit of a heat pump system depends on whether this heat exchanger functions as a condenser or an evaporator. A variable-path heat exchanger (VPHE) is proposed that can provide an optimal flow path for both condenser and evaporator conditions with one heat exchanger. The performance of VPHE was numerically analyzed, and the results sh ...
DOI:
10.1016/j.apenergy.2021.116741

5. Tango between Ethylene and HSFA2 Settles Heat Tolerance

Author:
Singh, Garima; Sarkar, Neelam K.; Grover, Anil
Source:
Trends in plant science 2021 v.26 no.5 pp. 429-432
ISSN:
1360-1385
Subject:
heat shock response; heat stress; heat tolerance,   etc   ; ethylene; fruits;     Show all 5 Subjects
Abstract:
... The phytohormone ethylene has roles in senescence, fruit ripening, and biotic and abiotic stress responses. However, the detailed mechanism(s) by which ethylene affects the plant heat stress response (HSR) is not well understood. Two recent studies by Huang et al. and Shekhawat et al. now reveal that ethylene signaling converges on HSFA2 to bring about heat stress (HS) tolerance in plants. ...
DOI:
10.1016/j.tplants.2021.03.003

6. Enhanced remediation of Cr(VI)-contaminated groundwater by coupling electrokinetics with ZVI/Fe3O4/AC-based permeable reactive barrier

Author:
Cao, Ruolin; Liu, Shiqing; Yang, Xinyu; Wang, Chunfeng; Wang, Yanbin; Wang, Wanfeng; Pi, Yunqing
Source:
Journal of environmental sciences (China) 2022 v.112 pp. 280-290
ISSN:
1001-0742
Subject:
heat treatment,   etc   ; X-ray diffraction; X-ray photoelectron spectroscopy; chemical speciation; electron transfer; groundwater; iron; permeability; redox potential; remediation; China;     Show all 11 Subjects
Abstract:
... Although widely used in permeation reaction barrier (PRB) for strengthening the removal of various heavy metals, zero-valent iron (ZVI) is limited by various inherent drawbacks, such as easy passivation and poor electron transfer. As a solution, a synergistic system with PRB and electrokinetics (PRB-EK) was established and applied for the efficient removal of Cr(VI)-contaminated groundwater. As th ...
DOI:
10.1016/j.jes.2021.05.002

7. Influence of pH and ionic strength on the thermal gelation behaviour of pea protein

Author:
Tanger, Caren; Müller, Michaela; Andlinger, David; Kulozik, Ulrich
Source:
Food hydrocolloids 2022 v.123 pp. 106903
ISSN:
0268-005X
Subject:
heat,   etc   ; denaturation; gelatinization temperature; gelation; gels; hydrocolloids; hydrophobicity; ionic strength; modulus of elasticity; pH; pea protein; rheology; solubility; thermal properties;     Show all 14 Subjects
Abstract:
... Gelation is one of the functional properties of protein, which can be controlled by pH and ionic strength. However, kowledge related to gelation properties of emerging plant proteins is still limited. In this paper, the solubility, the thermal behaviour and gelation behaviour of pea protein were analysed. Gels were analysed rheologically measuring the elastic modulus G′₂₅°C, the ratio of G′₂₅°C to ...
DOI:
10.1016/j.foodhyd.2021.106903

8. One-pot molten salt method for constructing CdS/C3N4 nanojunctions with highly enhanced photocatalytic performance for hydrogen evolution reaction

Author:
Zhao, Weijia; Niu, Hongyun; Yang, Yongliang; Lv, Hongzhou; Lv, Jungang; Cai, Yaqi
Source:
Journal of environmental sciences (China) 2022 v.112 pp. 244-257
ISSN:
1001-0742
Subject:
heat production,   etc   ; ; cadmium; electric field; energy; hydrogen production; irradiation; nanocomposites; nitrates; photocatalysis; photocatalysts; pollution; solar energy; temperature; thiourea; China;     Show all 16 Subjects
Abstract:
... The construction of heterojunction photocatalysts for efficiently utilizing solar energy has attracted considerable attention to solve the energy crisis and reduce environmental pollution. In this study, we use the energy released from an easily-occurred exothermic chemical reaction to serve as the drive force to trigger the formation of CdS and C₃N₄ nanocomposites which are successfully fabricate ...
DOI:
10.1016/j.jes.2021.05.019

9. Infrared convective drying of walnut with energy-exergy perspective

Author:
Karaca Dolgun, Gülşah; Aktaş, Mustafa; Dolgun, Ekin Can
Source:
Journal of food engineering 2021 v.306 pp. 110638
ISSN:
0260-8774
Subject:
heat pumps; heat recovery,   etc   ; exergy; walnuts;     Show all 4 Subjects
Abstract:
... Walnut drying is a time-consuming and an energy-intensive process. To decrease energy consumption a new type drying system was designed. Effect of heat transfer mechanism and bi-directional penetration of the heat to the product were investigated according to energy-exergy analysis. In this study, walnuts were dried with a heat pump dryer with heat recovery (HP) and an infrared assisted heat pump ...
DOI:
10.1016/j.jfoodeng.2021.110638

10. Interfacial heat transport in nano-carbon assemblies

Author:
Qiu, Lin; Zhang, Xiaohua; Guo, Zhixin; Li, Qingwen
Source:
Carbon 2021 v.178 pp. 391-412
ISSN:
0008-6223
Subject:
heat tolerance; heat transfer,   etc   ; carbon; thermal conductivity;     Show all 4 Subjects
Abstract:
... Although the individual one- and two-dimensional (1D and 2D) carbon nanostructures possess extremely high thermal conductivity, their macroscopic assemblies do not efficiently utilize it due to the larger interfacial contact thermal resistance. To improve the overall performance, the key is the interfacial structure design to provide sufficient pathways for phonon transport with a limited sacrific ...
DOI:
10.1016/j.carbon.2021.02.105

11. Latent heat storage capacity of NiTi shape memory alloy

Author:
Kato, Hiroyuki
Source:
Journal of materials science 2021 v.56 no.13 pp. 8243-8250
ISSN:
0022-2461
Subject:
heat; latent heat,   etc   ; absorption; alloys; nickel; titanium;     Show all 6 Subjects
Abstract:
... The largest amount of latent heat of the martensitic transformation in nickel titanium shape memory alloy was explored. The measured amounts of heat in the alloys with different compositions between 48.0 at.% Ni and 51.0 at.% Ni were compared. The largest amounts of [Formula: see text] 37.8 J/g in absorption and 34.8 J/g in emission were obtained as the averaged values of several samples with equi ...
DOI:
10.1007/s10853-021-05777-6

12. A novel spatial–temporal space heating and hot water demand method for expansion analysis of district heating systems

Author:
Meha, Drilon; Thakur, Jagruti; Novosel, Tomislav; Pukšec, Tomislav; Duić, Neven
Source:
Energy conversion and management 2021 v.234 pp. 113986
ISSN:
0196-8904
Subject:
heat; heat sums,   etc   ; administrative management; energy conversion;     Show all 4 Subjects
Abstract:
... The fourth generation of district heating will play a significant role in the decarbonization of energy systems. In general, only space heating demand is considered when assessing the district heating potential, excluding hot water. In contrast, the hot water demand accounts for up to 18% of total final energy demand in buildings. Hence, in this paper, a spatial–temporal method for annual hot wate ...
DOI:
10.1016/j.enconman.2021.113986

13. Carnot battery: Simulation and design of a reversible heat pump-organic Rankine cycle pilot plant

Author:
Eppinger, Bernd; Steger, Daniel; Regensburger, Christoph; Karl, Jürgen; Schlücker, Eberhard; Will, Stefan
Source:
Applied energy 2021 v.288 pp. 116650
ISSN:
0306-2619
Subject:
heat; heat pumps,   etc   ; batteries; models; thermal energy;     Show all 5 Subjects
Abstract:
... The steady growing demand of further storage capacity for the compensation of the daily fluctuations of renewable energies in national energy grids requires the development of new scalable energy storages. Pumped Thermal Energy Storages (PTES) like reversible heat pump - organic Rankine cycle systems are a possible candidate for this. In this work, the complete process from initial cycle design an ...
DOI:
10.1016/j.apenergy.2021.116650

14. Thermodynamic analysis and improvement of cascaded latent heat storage system using temperature-enthalpy diagram

Author:
Zhang, Chunwei; Zhang, Xuejun; Qiu, Limin; Zhao, Yang
Source:
Energy 2021 v.219 pp. 119573
ISSN:
0360-5442
Subject:
heat transfer; latent heat,   etc   ; energy; models; temperature;     Show all 5 Subjects
Abstract:
... In order to analyze and improve the cascaded latent heat storage (CLHS) system under the steady heat source, a novel method based on the temperature-enthalpy (T-H) diagram was developed. The heat storage and release processes can be intuitively described by the T-H diagram when the minimum temperature difference ΔTₘᵢₙ related to heat transfer capacity is defined, which is helpful to evaluate the C ...
DOI:
10.1016/j.energy.2020.119573

15. Thickness-Independent Vibrational Thermal Conductance across Confined Solid-Solution Thin Films

Author:
Giri, Ashutosh; Cheaito, Ramez; Gaskins, John T.; Mimura, Takanori; Brown-Shaklee, Harlan J.; Medlin, Douglas L.; Ihlefeld, Jon F.; Hopkins, Patrick E.
Source:
ACS applied materials & interfaces 2021 v.13 no.10 pp. 12541-12549
ISSN:
1944-8252
Subject:
heat; heat tolerance,   etc   ; calcium; strontium; thermal conductivity;     Show all 5 Subjects
Abstract:
... We experimentally show that the thermal conductance across confined solid-solution crystalline thin films between parent materials does not necessarily lead to an increase in thermal resistances across the thin-film geometries with increasing film thicknesses, which is counterintuitive to the notion that adding a material serves to increase the total thermal resistance. Confined thin epitaxial Ca₀ ...
DOI:
10.1021/acsami.0c20608

16. Control of peptide hydrogel formation and stability via heating treatment

Author:
Li, Qing; Zhang, Gong; Wu, Yifei; Wang, Yuefei; Liang, Yaoyu; Yang, Xin; Qi, Wei; Su, Rongxin; He, Zhimin
Source:
Journal of colloid and interface science 2021 v.583 pp. 234-242
ISSN:
0021-9797
Subject:
heat; heat treatment,   etc   ; alloys; dipeptides; hydrogels;     Show all 5 Subjects
Abstract:
... Heating treatment is widely used in the preparation of metallic materials with controlled phase behavior and mechanical properties. However, for the soft materials assembled by short peptides, especially simple dipeptides, the detailed influences of heating treatment on the structures and functions of the materials remain largely unexplored. Here we showed that by thermal annealing or quenching of ...
DOI:
10.1016/j.jcis.2020.09.032

17. Computational Study of the Use of Set Trimming for the Globally Optimal Design of Gasketed-Plate Heat Exchangers

Author:
Nahes, André L. M.; Martins, Natália R.; Bagajewicz, Miguel J.; Costa, André L. H.
Source:
Industrial & engineering chemistry process design and development 2021 v.60 no.4 pp. 1746-1755
ISSN:
1520-5045
Subject:
heat; heat exchangers,   etc   ; algorithms; chemistry; process design;     Show all 5 Subjects
Abstract:
... In this article, we present for the first time, a globally optimal design procedure of gasketed-plate heat exchangers using a new proposed technique: Set Trimming. Set Trimming is a recently developed optimization technique based on the sequential application of inequality constraints to gradually reduce the search space. This method eliminates several drawbacks that affect other optimization tech ...
DOI:
10.1021/acs.iecr.0c04751

18. Energy performance evaluation of two-phase injection heat pump employing low-GWP refrigerant R32 under various outdoor conditions

Author:
Kim, Dongwoo; Lee, DongChan; Lee, Minwoo; Chung, Hyun Joon; Kim, Yongchan
Source:
Energy 2021 v.214 pp. 119098
ISSN:
0360-5442
Subject:
heat; heat pumps,   etc   ; energy; temperature; weather;     Show all 5 Subjects
Abstract:
... The refrigerant R32 has been receiving significant attention as an alternative to R410A used in heat pumps, owing to its lower global warming potential. The two-phase injection (TPI) technique is introduced to achieve improved energy performance along with high system reliability in R32 heat pumps, owing to their high discharge temperature. The objectives of this study are to compare the performan ...
DOI:
10.1016/j.energy.2020.119098

19. Strategy for low-temperature operation of radiator systems using data from existing digital heat cost allocators

Author:
Benakopoulos, Theofanis; Tunzi, Michele; Salenbien, Robbe; Svendsen, Svend
Source:
Energy 2021 v.231 pp. 120928
ISSN:
0360-5442
Subject:
heat,   etc   ; energy; models; temperature;     Show all 4 Subjects
Abstract:
... The low-temperature operation of existing radiator systems connected to district heating is hindered by various factors, including non-ideal local control by users. The use of only a few of the available radiators to provide the necessary thermal comfort in an apartment is a common example. This requires a higher supply temperature and results in a high return temperature. This study investigated ...
DOI:
10.1016/j.energy.2021.120928

20. An open-source multiphysics simulation code for coupled problems in porous media

Author:
Wilkins, Andy; Green, Christopher P.; Ennis-King, Jonathan
Source:
Computers & geosciences 2021 v.154 pp. 104820
ISSN:
0098-3004
Subject:
heat,   etc   ; geochemistry; mechanics; temperature;     Show all 4 Subjects
Abstract:
... Numerical-simulation studies of transport and flow in porous media are essential in many practical fields of research. Including the coupling of different physical processes allows accurate modelling of the effects of fluid flow and temperature changes on the subsurface reservoir structure, and conversely, the effects of reservoir-structure changes on fluids and heat. In this study, we introduce t ...
DOI:
10.1016/j.cageo.2021.104820