Showing papers on "Heating system published in 2017"
TL;DR: In this paper, an optimal operation model for an integrated energy system (IES) combining the thermal inertia of a district heating network (DHN) and buildings to enhance the absorption of wind power is proposed.
317 citations
TL;DR: In this paper, the technical feasibility and economical applicability of low temperature air source heat pump heating mode were studied and compared with conventional heating systems, and a mathematical model of technical and economic analysis of different heating modes was established.
192 citations
TL;DR: In this paper, the authors investigated the heat transfer characteristics of the heat exchanger of a deep borehole ground source heat pump (DBGSHP) through both field test and numerical simulation.
154 citations
TL;DR: In this paper, the authors analyzed waste heat utilization from the perspectives of both the data center and district heating network operators, and quantified the system level effects of increased waste heat utilisation by simulating district heating production.
153 citations
TL;DR: In this paper, the authors describe the main factors and parameters involved in this technology, highlighting its effects on quality, microbial inactivation, and fouling during processing of dairy products.
Abstract: Background Ohmic Heating (OH) technology is a heating process wherein electric current is passed through the food acting as an electrical resistor, converting the electrical energy into thermal energy. This fact results in shorter heating times compared to the conventional process, which promotes some advantages, such as, the maintenance highest levels of nutritional compounds, the uniformness in heating system and the reduction in fouling formation. The success of the process depends on the parameters related to the food and process itself, such as, frequency, electrical field strength, residence time and electrical conductivity. Scope and approach This review aims to describe the main factors and parameters involved in this technology, highlighting its effects on quality, microbial inactivation, and fouling during processing of dairy products. Key findings and conclusions Due to the more rapid and uniform heating, the OH technology has advantages over the conventional processes, such as maintenance of nutritional compounds and reduction of fouling, which are important factors in the dairy products processing. In addition, there are additional effects of electroporation on microbial cells, which promotes further microorganisms inactivation which are problematic for safety of dairy foods.
139 citations
TL;DR: In this paper, the authors summarized the current situation of solar heating and cooling, and then some new achievements in related areas and potential future market penetration are discussed, and economic analysis of solar heat and cooling system is also discussed.
138 citations
TL;DR: In this article, the authors present a design and operational optimisation model which is able to assess the performance of HP-TES relative to conventional heating systems, and the optimisation is performed on a synthetic heat demand model which requires only the annual heat demand, temperature and occupancy profiles.
125 citations
TL;DR: A novel framework for representing and simplifying on-grid energy systems as well as for dynamic thermo-hydraulic simulation and optimization of district heating and cooling systems and a novel method to decompose a mixed-integer-optimal control problem into two sub-problems is proposed.
109 citations
TL;DR: In this paper, a low temperature district heating and cooling system based on renewable energy sources is investigated by means of a dynamic simulation model and an energy-economic analysis, where a novel solution consisting of geothermal, solar and biomass energy sources integration is considered.
89 citations
TL;DR: In this article, a multi-objective optimization model has been developed that combines the optimal design and operation of distributed energy systems, the design of district heating (DH), electricity grid constraints based on linearized alternating current (AC) power flow and grid upgrade options.
88 citations
TL;DR: In this paper, a simple autoregressive forecast model with weather prediction input is used to showcase the new concept, which is useful in both the production planning and the online operation of a modern district heating system, in particular in light of the low temperature operation, integration of renewable energy and close interaction with the electricity markets.
TL;DR: In this article, the authors analyzed the opportunities for peak load shaving in district heating systems using a physical simulation tool and showed that even in the case only small changes are applied, reductions in annual primary energy consumption up to 0.4% can be obtained without any additional investment cost.
TL;DR: In this article, the coordinated dispatch of integrated electrical and heating systems (CDIEHS), considering the energy storage of both pipelines in the DHN and heat storage tanks, is formulated as a convex quadratic program.
TL;DR: In this paper, an optimal control model for studying the economic and grid interaction benefits of smart charging of electric vehicles (EV), vehicle-to-grid, and space heating load control for residential houses with on-site photovoltaics (PV) was presented.
TL;DR: In this paper, the effect of different operating parameters, viz., inlet water temperature, solar insolation, ambient temperature, and mass flow rate on the outlet water temperature and thermal efficiency were studied.
TL;DR: In this article, the authors analyzed how increased integration of heat and power markets by use of power-to-heat in district heating system could increase the value VRE sources in the Northern European power system.
TL;DR: In this article, the authors investigated two aspects of personalized heating, effectiveness of different heaters and impact of different control modes, and found that the automatic control mode could provide the same level of thermal comfort as user control.
TL;DR: In this article, the authors developed and demonstrated an optimization model capable of handling both the sizing and the operation of a district heating system based on a heat only boiler, solar thermal collectors, electric heaters, heat pumps and thermal energy storage units.
TL;DR: In this article, the integration of large solar heating systems in district heating (DH) networks with large combined heat and power (CHP) plants is rarely considered, due to low costs for heat but also due to subsidies for the electricity by CHP plants.
TL;DR: In this paper, energy and exergy analyses of natural gas fired boilers in a district heating system are performed, and the energy, exergy flow diagrams are illustrated by specifying locations of irreversibilities.
TL;DR: In this article, an alternative design approach for a similar community is presented, where the primary goal is to develop a system that not only achieves similar or better performance but also costs less.
TL;DR: In this article, the authors compared the energy efficiency of a solar assisted heat pump heating system powered by flat plate collectors with a conventional air source heat pump system for twenty European cities.
TL;DR: In this article, the authors investigated what the temperatures are and to provide statistics on the radiator temperatures on the secondary side of district heating systems, and the results, incorporating data from 109 radiator systems located in Gothenburg's district heating system, showed that the average supply and return temperatures for design outdoor temperature is 64 °C and 42 °C, respectively.
TL;DR: Wang et al. as mentioned in this paper proposed a solar phase change thermal storage (SPCTS) heating system using a radiant-capillary-terminal (RCT) to effectively match the low temperature hot water, and an air source heat pump (ASHP) as an alternate energy.
TL;DR: In this paper, the authors report on a project where 18 Danish single-family houses from the 1980s were supplied by ultra-low-temperature district heating with a supply temperature as low as 45 °C for the main part of the year.
TL;DR: In this article, the authors analyse the economic performance of an integrated system for a residential CHP (Combined Heat and Power) application, based on the integration of a Fuel Cell (FC) micro-cogeneration device coupled with an HP.
TL;DR: Wang et al. as discussed by the authors formulated a combined heat and power dispatch model considering both the pipelines' dynamic thermal performance (PDTP) and the buildings' thermal inertia (BTI), emphasizing the coordinating operation between the electric power and district heating systems to break the strong coupling without impacting end users' heat supply quality.
Abstract: The strong coupling between electric power and heat supply highly restricts the electric power generation range of combined heat and power (CHP) units during heating seasons. This makes the system operational flexibility very low, which leads to heavy wind power curtailment, especially in the region with a high percentage of CHP units and abundant wind power energy such as northeastern China. The heat storage capacity of pipelines and buildings of the district heating system (DHS), which already exist in the urban infrastructures, can be exploited to realize the power and heat decoupling without any additional investment. We formulate a combined heat and power dispatch model considering both the pipelines’ dynamic thermal performance (PDTP) and the buildings’ thermal inertia (BTI), abbreviated as the CPB-CHPD model, emphasizing the coordinating operation between the electric power and district heating systems to break the strong coupling without impacting end users’ heat supply quality. Simulation results demonstrate that the proposed CPB-CHPD model has much better synergic benefits than the model considering only PDTP or BTI on wind power integration and total operation cost savings.
TL;DR: In this article, the authors investigate geothermal heat pump aided district heating for a town center with a population of nearly 25,000, from the exergy and economic points of view.
TL;DR: In this article, a new hydraulic regulation method was proposed to achieve on-site hydraulic balance for the district heating systems with distributed variable-speed-pumps configuration, which was comprised of a hydraulic model, which is developed to adapt the distributed variable speed-pump configuration, and a calibration model with genetic algorithm by carrying out the proposed method step by step, the flow rates of all distributed pumps can be progressively adjusted to their designated values.
TL;DR: In this paper, the authors compared four control strategies for a hydronic heating system that combines two different terminal units, radiant floor and fan-coil, in the same thermal zone.