PubAg

Main content area

You searched for: Subject "heating systems" Remove constraint Subject: "heating systems"
Start Over

Search

1,270  Search Results

« Previous | 1 - 20 of 1,270 |
Number of results to display per page

Search Results

1. Ohmic heating of a solid-liquid food mixture in an electrically conductive package

Author:
Wattanayon, Wassamon; Udompijitkul, Pathima; Kamonpatana, Pitiya
Source:
Journal of food engineering 2021 v.289 pp. 110180
ISSN:
0260-8774
Subject:
heating systems,   etc   ; Escherichia coli O157; alginates; ascorbic acid; beverages; electrical conductivity; food safety; heat; microorganisms; model food systems; ohmic heating; orange juice; pasteurization; temperature; Asia; Europe;     Show all 16 Subjects
Abstract:
... Additive-free and nutritious packaged fruit juice (especially orange juice) is a popular beverage worldwide. Moreover, a beverage with particles and chunks provides a new experience to consumers and has become famous in Asia and Europe. The major challenge is to ensure the solid-liquid food mixture receives sufficient heat treatment, especially the solid particles, while at the same time preservin ...
DOI:
10.1016/j.jfoodeng.2020.110180

2. An agent-based distributed real-time optimal control strategy for building HVAC systems for applications in the context of future IoT-based smart sensor networks

Author:
Su, Bing; Wang, Shengwei
Source:
Applied energy 2020 v.274 pp. 115322
ISSN:
0306-2619
Subject:
heating systems,   etc   ; air conditioning; automation; controllers; energy; ventilation systems;     Show all 6 Subjects
Abstract:
... Existing studies on distributed optimal control of HVAC systems rarely consider the needs and constraints for practical applications and the deployment of control strategies on the physical building automation platforms. This paper proposes an agent-based distributed real-time control strategy for building HVAC systems with the objective to be deployed in the local control devices with limited pro ...
DOI:
10.1016/j.apenergy.2020.115322

3. A theoretical analysis of the daily performance of a new water tank with multiple outlets in solar water heating system

Author:
Li, Jiarong; Li, Xiangdong; Wang, Yong; Tu, Jiyuan
Source:
Journal of cleaner production 2020 v.262 pp. 121166
ISSN:
0959-6526
Subject:
heating systems,   etc   ; fluid mechanics; heat; mathematical models; solar radiation; temperature;     Show all 6 Subjects
Abstract:
... A variable-volume tank featured with multiple outlets is lately proposed to cater for the varying needs of tank volume. Compared with conventional tank, the new tank can help shorten the thermal response time and improve the solar charging performance. In this paper, a mathematical model is developed to simulate the solar charging and discharging performances of the new tank. The model, based on t ...
DOI:
10.1016/j.jclepro.2020.121166

4. Thermal performance of a closed collector–storage solar air heating system with latent thermal storage: An experimental study

Author:
Chen, C.Q.; Diao, Y.H.; Zhao, Y.H.; Wang, Z.Y.; Liang, L.; Wang, T.Y.; Zhu, T.T.; Ma, C.
Source:
Energy 2020 v.202 pp. 117764
ISSN:
0360-5442
Subject:
heating systems,   etc   ; air; energy; heat; meteorological parameters; phase transition; temperature;     Show all 7 Subjects
Abstract:
... The collector–storage solar air heating system has huge application potential in many fields. Traditional collector–storage solar air heating systems have been applied in related fields, but improving the temperature of phase change materials (PCMs) quickly is difficult because these systems are open. On the basis of a literature review, this study proposes a closed collector–storage solar air hea ...
DOI:
10.1016/j.energy.2020.117764

5. District heating load profiles for domestic hot water preparation with realistic simultaneity using DHWcalc and TRNSYS

Author:
Braas, Hagen; Jordan, Ulrike; Best, Isabelle; Orozaliev, Janybek; Vajen, Klaus
Source:
Energy 2020 v.201 pp. 117552
ISSN:
0360-5442
Subject:
heating systems,   etc   ; buildings; energy; heat; probability distribution; systems engineering; temperature;     Show all 7 Subjects
Abstract:
... To reach the goal of decarbonizing energy systems, newly constructed buildings must adhere to higher efficiency standards. In new residential developments, this results in a higher share and significance of the energy demand for domestic hot water preparation. In order to generate realistic load profiles for domestic hot water preparation, which can help with dimensioning district heating systems, ...
DOI:
10.1016/j.energy.2020.117552

6. Experimental study on the dynamics, quality and impacts of using variable-speed pumps in buildings for frequency regulation of smart power grids

Author:
Wang, Huilong; Wang, Shengwei; Shan, Kui
Source:
Energy 2020 v.199 pp. 117406
ISSN:
0360-5442
Subject:
heating systems,   etc   ; air conditioning; air temperature; buildings; pumps; ventilation systems;     Show all 6 Subjects
Abstract:
... The increased generation of renewable power is challenging in terms of the power balance and reliability of power grids due to the intermittent nature of renewable sources. Heating, ventilation, and air-conditioning (HVAC) systems in buildings, at demand side, are promising candidates for providing frequency regulation. In this study, we systematically assessed the use of variable-speed pumps in H ...
DOI:
10.1016/j.energy.2020.117406

7. Agent-based distributed demand response in district heating systems

Author:
Cai, Hanmin; You, Shi; Wu, Jianzhong
Source:
Applied energy 2020 v.262 pp. 114403
ISSN:
0306-2619
Subject:
heating systems,   etc   ; buildings; communications technology; heat; primary energy;     Show all 5 Subjects
Abstract:
... Current district heating systems are moving towards 4th generation district heating in which end-users play an active role in system operation. Research has shown that optimising buildings' heating demands can release network congestion and contribute to reducing primary energy usages. Coupled with end-user privacy concerns, an approach in which buildings jointly optimise their heating demands whi ...
DOI:
10.1016/j.apenergy.2019.114403

8. Demand side management of heat in smart homes: Living-lab experiments

Author:
Christensen, Morten Herget; Li, Rongling; Pinson, Pierre
Source:
Energy 2020 v.195 pp. 116993
ISSN:
0360-5442
Subject:
heating systems,   etc   ; ambient temperature; buildings; energy; heat; residential housing;     Show all 6 Subjects
Abstract:
... In smart energy systems the role of the building is transformed from being a passive consumer into an energy flexibility provider. Buildings are expected to have flexible energy demand to provide services to energy grids. In this paper we present an experimental study conducted in a multi-storey residential apartment building. In the experiments supervisory control of individual room temperatures ...
DOI:
10.1016/j.energy.2020.116993

9. Combined steam based high-temperature heat and power storage with an Organic Rankine Cycle, an efficient mechanical electricity storage technology

Author:
Arabkoohsar, A.
Source:
Journal of cleaner production 2020 v.247 pp. 119098
ISSN:
0959-6526
Subject:
heating systems,   etc   ; electricity; energy; heat; rocks; steam; storage technology;     Show all 7 Subjects
Abstract:
... Today, mechanical energy storages are getting more important than before as the share of fluctuating renewable energies are dramatically increasing in the global energy matrix. Steam-based high-temperature heat and power storage is one of the very recent mechanical energy storage technologies introduced. This system stores electricity as heat in a packed bed of rocks and then, co-generates heat an ...
DOI:
10.1016/j.jclepro.2019.119098

10. Implementing flexibility into energy planning models: Soft-linking of a high-level energy planning model and a short-term operational model

Author:
Dominković, Dominik Franjo; Junker, Rune Grønborg; Lindberg, Karen Byskov; Madsen, Henrik
Source:
Applied energy 2020 v.260 pp. 114292
ISSN:
0306-2619
Subject:
heating systems,   etc   ; capital; energy; heat; models; planning; renewable energy sources;     Show all 7 Subjects
Abstract:
... The operation of electric and heat grids alike is complicated due to the dynamic demand, with the increasing penetration of renewable energy sources adding to the problem. In order to improve the integration of variable renewable energy sources, the flexibility of the system needs to be improved. This paper proposed a novel characterization of the short-term energy flexibility, which was further u ...
DOI:
10.1016/j.apenergy.2019.114292

11. Improvement of the efficiency of solar thermal energy storage systems by cascading a PCM unit with a water tank

Author:
Huang, Haotian; Xiao, Yimin; Lin, Jianquan; Zhou, Tiecheng; Liu, Yanan; Zhao, Qian
Source:
Journal of cleaner production 2020 v.245 pp. 118864
ISSN:
0959-6526
Subject:
heating systems,   etc   ; computer software; heat; models; sodium acetate; supercooling; temperature;     Show all 7 Subjects
Abstract:
... For solar heating systems, adding phase change material (PCM) can significantly increase the thermal storage capacity. This paper proposes a system using a PCM thermal storage unit cascadely combined with a water tank and configures a composite PCM suitable for the system. This study investigates the impact of this system configuration on the system efficiency while developing a matching principle ...
DOI:
10.1016/j.jclepro.2019.118864

12. Power and energy flexibility of district heating system and its application in wide-area power and heat dispatch

Author:
Yifan, Zhou; Wei, Hu; Le, Zheng; Yong, Min; Lei, Chen; Zongxiang, Lu; Ling, Dong
Source:
Energy 2020 v.190 pp. 116426
ISSN:
0360-5442
Subject:
heating systems,   etc   ; algorithms; energy; heat; mathematical models; wind power; China;     Show all 7 Subjects
Abstract:
... In northern China, transmission power system and district heating systems (DHSs) are directly connected by large-capacity combined heat and power (CHP) units, which composes the wide-area integrated power and heat system (IPHS). For better wind power accommodation, it is crucial to explore the operational flexibility of each local DHS in the wide-area IPHS. This paper investigates the available el ...
DOI:
10.1016/j.energy.2019.116426

13. Improving power quality efficient in demand response: Aggregated heating, ventilation and air-conditioning systems

Author:
Chen, Xu-Dong; Li, Lingling; Tseng, Ming-Lang; Tan, Kimhua; Ali, Mohd Helmi
Source:
Journal of cleaner production 2020 v.267 pp. 122178
ISSN:
0959-6526
Subject:
heating systems,   etc   ; air conditioning; algorithms; electrical equipment; energy use and consumption; heat; models; ventilation systems;     Show all 8 Subjects
Abstract:
... This study aims to identify the role of aggregated heating, ventilation, and air conditioning (HVAC) loads based on system characteristics using the lazy state switching control mode focusing on the overall power consumption rather individual response speed. This study is attempted to provide secondary frequency regulation using aggregated HVAC loads with more stable operation with the lazy state ...
DOI:
10.1016/j.jclepro.2020.122178

14. Profitability of contracting business cases for shared photovoltaic generation and renovation measures in a residential multi-apartment building

Author:
Fina, Bernadette; Auer, Hans; Friedl, Werner
Source:
Journal of cleaner production 2020 v.265 pp. 121549
ISSN:
0959-6526
Subject:
heating systems,   etc   ; algorithms; buildings; carbon dioxide; contractors; greenhouse gas emissions; heat; models; profitability; solar collectors;     Show all 10 Subjects
Abstract:
... This study investigates the profitability of implementing active and passive building retrofitting measures, either individually or combined, within the framework of contracting. Three contracting models are investigated: (i) Photovoltaic (PV) contracting, (ii) renovation contracting, (iii) PV and renovation contracting including a heating system change. Since this study’s practical approach focus ...
DOI:
10.1016/j.jclepro.2020.121549

15. A virtual sensor based self-adjusting control for HVAC fast demand response in commercial buildings towards smart grid applications

Author:
Ran, Fengming; Gao, Dian-ce; Zhang, Xu; Chen, Shuyue
Source:
Applied energy 2020 v.269 pp. 115103
ISSN:
0306-2619
Subject:
heating systems,   etc   ; air; air conditioning; buildings; electrical equipment; flowmeters; heat; models; ventilation systems; water flow;     Show all 10 Subjects
Abstract:
... The power grid is facing the critical issue concerning the power imbalance. To address the issue, demand response programs are increasingly deployed to encourage the end-users to change their load profiles. For buildings, the existing fast demand response strategy has been demonstrated effective in performing quick response to the grid request by reducing the power demand. However, the existing fa ...
DOI:
10.1016/j.apenergy.2020.115103

16. Multi-criteria comprehensive study on predictive algorithm of heating energy consumption of district heating station based on timeseries processing

Author:
Wang, Chendong; Yuan, Jianjuan; Zhang, Ji; Deng, Na; Zhou, Zhihua; Gao, Feng
Source:
Energy 2020 v.202 pp. 117714
ISSN:
0360-5442
Subject:
heating systems,   etc   ; algorithms; energy; energy use and consumption; heat; prediction; processing technology; time series analysis;     Show all 8 Subjects
Abstract:
... Refined control of district heating station relies on reasonable and accurate prediction of heating energy consumption. Due to the influence of building thermal inertia and time-delay of the district heating system, certain research work is necessary to thoroughly illustrate and analyze the impact of data timeseries processing on various prediction models. Four kinds of prediction algorithms were ...
DOI:
10.1016/j.energy.2020.117714

17. Design, fabrication and validation of an improved coil for induction dilatometry

Author:
Kaiser, D.; Torres-Velasquez, D.; Dietrich, S.; Schulze, V.
Source:
Thermochimica acta 2020 v.689 pp. 178612
ISSN:
0040-6031
Subject:
heating systems,   etc   ; cooling; heat; instrumentation; manufacturing; phase transition; temperature profiles; thermal expansion;     Show all 8 Subjects
Abstract:
... Dilatometry is a versatile tool to investigate thermal expansion or phase transformations in various materials based on the length changes upon heating and cooling. Since most modern thermal processes tend to take place at high heating and cooling rates it can be demonstrated that a large longitudinal temperature gradient within dilatometric samples impedes the accurate investigation of physical m ...
DOI:
10.1016/j.tca.2020.178612

18. Warming with wood: Exploring the everyday heating practices of rural off-gas households in Wales

Author:
Roberts, Erin
Source:
Energy policy 2020 v.142 pp. 111451
ISSN:
0301-4215
Subject:
heating systems,   etc   ; biomass; carbon; energy; energy poverty; fires; heat; households; issues and policy; wood; Wales;     Show all 11 Subjects
Abstract:
... Rural off-gas households, the highest carbon emitters in the UK, have largely been overlooked in energy scholarship and policy, resulting in limited understanding of the ways in which the socio-material inequalities shape their likelihood of moving into fuel poverty. This paper sets out to fill this knowledge gap by developing a better understanding of the role that non-standard heating technologi ...
DOI:
10.1016/j.enpol.2020.111451

19. A novel super high back pressure cascade heating scheme with multiple large-scale turbine units

Author:
Ma, Liqun; Ge, Zhihua; Zhang, Fuxiang; Wei, Huimin
Source:
Energy 2020 v.201 pp. 117469
ISSN:
0360-5442
Subject:
heating systems,   etc   ; coal; energy conservation; exergy; heat recovery; power generation; steam; turbines;     Show all 8 Subjects
Abstract:
... The recovery of waste heat from power generation by the utilization of energy cascade for district heating has become an important method to improve the energy saving of combined heat and power (CHP) plants. In this paper, a novel super high back pressure (SHBP) cascade heating scheme is proposed to recover waste heat further and tap the energy saving potential of multi-unit combined heating syste ...
DOI:
10.1016/j.energy.2020.117469

20. Energy saving potentials of integrating personal thermal comfort models for control of building systems: Comprehensive quantification through combinatorial consideration of influential parameters

Author:
Jung, Wooyoung; Jazizadeh, Farrokh
Source:
Applied energy 2020 v.268 pp. 114882
ISSN:
0306-2619
Subject:
heating systems,   etc   ; air conditioning; climate; energy conservation; energy efficiency; probabilistic models; ventilation systems;     Show all 7 Subjects
Abstract:
... Research studies provided evidence on the energy efficiency of integrating personal thermal comfort profiles into the control loop of Heating, Ventilation, and Air-Conditioning (HVAC) systems (i.e., comfort-driven control). However, some conflicting cases with increased energy consumption were also reported. Addressing the limited and focused nature of those demonstrations, in this study, we have ...
DOI:
10.1016/j.apenergy.2020.114882