Hot Water Supply and Heating System with Supercooled Thermal Energy storage

2013 ◽  
Vol 116 (1135) ◽  
pp. 394-395
Author(s):  
Satoshi HIRANO
Keyword(s):  
Energy Storage ◽  
Water Supply ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Heating System ◽  
Hot Water ◽  
Hot Water Supply

scholarly journals РАЗРАБОТКА АЛГОРИТМА УПРАВЛЕНИЯ СИСТЕМОЙ ОТОПЛЕНИЯ И ГОРЯЧЕГО ВОДОСНАБЖЕНИЯ С ИСПОЛЬЗОВАНИЕМ ВОЗОБНОВЛЯЕМЫХ ИСТОЧНИКОВ ЭНЕРГИИ

2018 ◽  
Vol 9 (4) ◽  
Author(s):  
А. А. Процишен ◽  
Е. О. Улицкая
Keyword(s):  
Renewable Energy ◽  
Control System ◽  
Water Supply ◽  
Thermal Energy ◽  
Renewable Energy Sources ◽  
Heating System ◽  
Hot Water ◽  
Energy Sources ◽  
Renewable Sources ◽  
Hot Water Supply

The study analyzed the heating system and hot water supply with  using renewable energy sources. To design an automatic control system for heating and hot water supply, which includes a solar collector, a heat pump and a centralized heating source, the following tasks were set: - study of scientific literature on the operation of renewable energy sources; - design of a structural diagram of the automation section; - design of an algorithm for controlling the heating system and hot water supply. The relevance of designing a control system for an object with a variable structure is shown. As an automation object, the system of heat supply and hot water supply with the use of renewable energy sources is considered. The possibility of sharing a heat pump, solar collectors and a centralized source of thermal energy for heating and hot water supply was explored. The technological scheme, the automation scheme, the control algorithm, the software of the complex are designed. The proposed algorithm for controlling the heating system and hot water supply realizes the cascading operation of equipment with the priority of switching on renewable sources of thermal energy to solve the problem of reducing energy consumption. The software of the developed control system and simulation of the heating and hot water supply system was implemented in the programming environment of the controller ОВЕН ПЛК160. For technical implementation, modern automatic control system devices and renewable sources of thermal energy have been selected. The management of automation tools, data collection and visualization is carried out with the help of SCADA-system WebHMI, operating in the real-time operating system. The obtained results of simulation are confirmed by the introduction and successful operation of the designed automatic control system at the municipal enterprise of the town of Yuzhniy. The joint work of renewable sources of thermal energy and boiler equipment under the management of the developed management system has proved its energy efficiency both during and outside the heating season, and it makes it possible to achieve 30% savings on heating and hot water.

scholarly journals EFFICIENCY OF THERMAL ENERGY GENERATION BY COGENERATION PLANTS DUE TO THE MAXIMUM USE OF HEAT

2021 ◽  
Vol 7 (2(38)) ◽  
pp. 66-71
Author(s):  
Maxim Olegovich Maximov
Keyword(s):  
Water Supply ◽  
Thermal Energy ◽  
District Heating ◽  
Heating System ◽  
Heat Losses ◽  
Hot Water ◽  
Water Supply Systems ◽  
Hot Water Supply ◽  
Hot Water Supply System ◽  
Supply Systems

ignificant heat losses in centralized heating and hot water supply systems during the transportation of heat carriers lead to the need for decentralization of heat generating installations. It is shown that steam and gas installations for combined heat and power generation deserve the greatest attention. The ways of increasing the efficiency of cogeneration plants of various capacities based on CCGT by utilizing the heat of the heating system by installing recuperative heat exchangers on the return lines of the heating system after heating devices that are connected to the hot water supply network are substantiated, which makes it possible to reduce heat losses to the environment. The proposed system of rational interaction of the power plant with the heating and hot water supply system, which allows increasing the thermal efficiency of the cogeneration plant by 2%, which corresponds to a fuel saving of 3% due to the more complete use of the thermal energy of steam, which is sent as a selection for district heating. This article discusses solutions aimed at increasing the efficiency of heat generation by cogeneration plants by maximizing the use of heat from the exhaust steam of turbines.

scholarly journals Performance Optimization and Economic Evaluation of CO2 Heat Pump Heating System Coupled with Thermal Energy Storage

2021 ◽  
Vol 13 (24) ◽  
pp. 13683
Author(s):  
Zhihua Wang ◽  
Yujia Zhang ◽  
Fenghao Wang ◽  
Guichen Li ◽  
Kaiwen Xu
Keyword(s):  
Energy Storage ◽  
Heat Pump ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Performance Optimization ◽  
Life Cycle Cost ◽  
Operating Cost ◽  
Heating System ◽  
Hot Water ◽  
Great Resistance

CO2 air source heat pump (ASHP), as a kind of clean and efficient heating equipment, is a promising solution for domestic hot water and clean heating. However, the promotion of CO2 ASHP encounters a great resistance when it is used for space heating; namely, the return water temperature is too high that cased higher throttle loss, which decreases the COP of the CO2 ASHP unit. To solve this problem, a heating system of CO2 ASHP coupled with thermal energy storage (TES) is developed in this work. The simulation model of the studied system is established using TRNSYS software, and the model is verified by experimental data. Additionally, the performance of the studied system is optimized, and its economy is analyzed by life cycle cost (LCC). The results showed that, compared with the system before optimization, the cost of the optimized system increased, the annual operating cost of the system was reduced, and the COP of the system (COPsys) increased by 7.4%. This research is helpful in improving the application of the CO2 ASHP unit in cold server and cold areas.

scholarly journals Self-Sufficiency and Energy Savings of Renewable Thermal Energy Systems for an Energy-Sharing Community

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4284
Author(s):  
Min-Hwi Kim ◽  
Youngsub An ◽  
Hong-Jin Joo ◽  
Dong-Won Lee ◽  
Jae-Ho Yun
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Energy Systems ◽  
Hot Water ◽  
Pump System ◽  
Ground Source Heat Pumps ◽  
Self Sufficiency ◽  
Energy Sharing

Due to increased grid problems caused by renewable energy systems being used to realize zero energy buildings and communities, the importance of energy sharing and self-sufficiency of renewable energy also increased. In this study, the energy performance of an energy-sharing community was investigated to improve its energy efficiency and renewable energy self-sufficiency. For a case study, a smart village was selected via detailed simulation. In this study, the thermal energy for cooling, heating, and domestic hot water was produced by ground source heat pumps, which were integrated with thermal energy storage (TES) with solar energy systems. We observed that the ST system integrated with TES showed higher self-sufficiency with grid interaction than the PV and PVT systems. This was due to the heat pump system being connected to thermal energy storage, which was operated as an energy storage system. Consequently, we also found that the ST system had a lower operating energy, CO2 emissions, and operating costs compared with the PV and PVT systems.

scholarly journals Analysis of procedures for heating, ventilation and air conditioning for transfer to low-temperature heat supply

2019 ◽  
pp. 8-8
Author(s):  
Stanislav Chicherin
Keyword(s):  
Water Supply ◽  
Heat Supply ◽  
Heating System ◽  
Heat Energy ◽  
Hot Water ◽  
Heat Consumption ◽  
High Quality ◽  
Hot Water Supply ◽  
Supply Systems ◽  
Selection Of

Introduction. Renovation of housing stock supposes construction of new buildings, where the main utilities consuming heat energy will be heating and hot water supply (HWS) systems. Under such conditions the task of heat consumption reduction by transfer to low-temperature and use of the associated procedures is relevant. Materials and Methods. Research was performed on the basis of residential and administration buildings designed within the whole Russia, the facilities were selected based on the year of putting into operation and their purpose. The source of data concerning buildings became documents included into the scope of the design and detailed documentation: plans, drawings and explanatory notes. As meeting the demands of hot water supply makes the main contribution to daily nonuniformities of heat energy consumption, the attention was paid to equipment of hot water supply systems. For calculations, the commercial product of Microsoft Office Excel 2010 was used. Results. During selection of roof boiler house as a source of heat supply increase in consumption of equivalent fuel in relation to the variant of connection to heat power plant operating on solid fuel by 187,314 tons of fuel oil equivalent is possible. General refusal from power-and-heat generation complicates operation of large district heat supply systems. The design parameters of coolant in building heating system differ from project to project: from 95/70 °С, used everywhere till the beginning of the XXI century, up to 90/65 °С corresponding to existing practice of designing or 80/60 °С as at the facility in Sevastopol. Reduction of design temperatures by 5 % is insufficient to decrease general heat consumption of the building. Reduction of heat consumption is explained by selection of advanced materials for pipeline heat insulation. Use of automation diagrams for heat points on the basis of regulator ECL Comfort 310 contributes to improvement of hydraulic control for heating systems, however, concealed automation results in violation of high-quality mode for heat network control and decrease of coolant parameters on adjacent (often non-automated) consumers. Conclusions. Supplement of central high-quality control by local constant temperature/variable flow control at individual heat unit and installation of temperature controllers on heating radiators with mechanical thermostatic head have potential for reduction of the heat energy volume used ineffectively. Increase in level of controllability for heating system together with cheaper and responsive automation systems are basic conditions for increase in quality of heat supply in future.

scholarly journals Prospect for the using of heat pumps for heating of buildings in enterprise

2020 ◽  
Author(s):  
Z. Sirkо ◽  
◽  
V. Korenda ◽  
I. Vyshnyakov ◽  
O. Protasov ◽  
...  
Keyword(s):  
Water Supply ◽  
Heat Pump ◽  
Thermal Energy ◽  
Alternative Energy ◽  
Thermodynamic Cycle ◽  
Heat Pumps ◽  
The State ◽  
Hot Water ◽  
Alternative Energy Sources ◽  
Hot Water Supply

Heat pump - a device for transferring thermal energy from a source of low potential thermal energy to a consumer with a higher temperature. The thermodynamic cycle of a heat pump is similar to a refrigerating machine. Depending on the principle of operation, heat pumps are divided into compression and absorption. The most commonly used compression heat pumps. In recent years, numerous publications on the use of heat pump technology in heating and hot water supply facilities of various spheres - from individual homes to residential neighborhoods have appeared in various media. The authors of the publication have many years of experience in joint scientific and technical cooperation with leading technical universities and industrial organizations in the field of development and practical use of heat pump technology. The authors analyze the possibilities of introducing heat pumps at enterprises and organizations of the State Reserve System of Ukraine. It has been shown that the amount of expenses in comparison with central heating or operation of gas and electric boilers of similar power is several times smaller. It is noted that the implementation of heat pumps is a promising direction in the use of alternative energy sources to meet the heating, ventilation and hot water supply needs of buildings. The payback period from the introduction of heat pumps at enterprises is 4-9 years, depending on the location of the object and the type of source of low-temperature heat. The article meets the requirements of the State Tax Code of Ukraine and can be recommended for publication.

A Geothermal Energy Concept based on Heat Storage in Geological Media

2021 ◽  
Author(s):  
Rubén Vidal ◽  
Maarten W. Saaltink ◽  
Sebastià Olivella
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Energy Demand ◽  
Ground Deformation ◽  
Hot Water ◽  
Energy Deficit ◽  
Good Tool ◽  
Aquifer Thermal Energy Storage ◽  
Low Efficiency

<p>Aquifer Thermal Energy Storage (ATES) can help to balance energy demand and supply to make better use of infrastructures and resources. ATES consists of a pair or more wells that simultaneously inject or extract thermal energy into aquifers. The aim of ATES is to store the excess of energy during summer and to reuse it during winter, when there is an energy deficit. High-temperature Aquifer Thermal Energy Storage (HT-ATES) provides a good option to store water over 50°C, but it requires facing some problems, such as low efficiency recoveries and the uplift of the surface. Coupled thermo-hydro-mechanical (THM) modelling is a good tool to analyze the viability and cost effectiveness of the HT-ATES systems and understand the interaction of processes, such as heat flux, groundwater flow and ground deformation. We present the 3D THM modelling of a pilot HT-ATES system, inspired by one of the projects of HEATSTORE, which is a GEOTHERMICA ERA-NET co-funded project. The model aims to simulate the injection of hot water of 90°C in a central well and the extraction of water in four auxiliary wells during summer. In winter, the auxiliary wells inject water of 50°C and the central well extract water. The loading lasts longer than the unloading (8 months versus 4 months) and overall more heat is injected than extracted. We found that the system is more efficient in terms of energy recovery, the more years the system is operating. In the aquifer, both thermal loads and hydraulic loads have an important role in terms of displacements. At the surface, the vertical displacements are only a consequence of the hydraulic strains generated by the injection of water in the aquifer.</p>

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