Integrating a heat pump into a 4th generation district heating (4GDH) system – Two-mode configuration inputting operational data

Чичерин, Станислав; Zhuikov, A. V.; Junussova, Lyazzat

doi:10.1016/j.enbuild.2022.112445

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…Building heating issues are an integral part of the construction of modern urban neighborhoods according to the "Green Building" principle [1,2]. Basically, to heat buildings, this principle assumes the use of renewable energy sources within the framework of nearly zero-energy building (nZEB); for this purpose, fourth-and fifth-generation heating systems are used [3][4][5]. Such sources of thermal energy include electric boilers, heat pumps, pyrolysis reactors, etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental Combustion of Different Biomass Wastes, Coals and Two Fuel Mixtures on a Fire Bench

Zhuikov,

Zemlyanskiy,

Grishina

et al. 2024

Sustainability

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When designing settlements according to the “Green Building” principle, it is necessary to develop a heating system based on climatic conditions. For example, in areas with a sharply continental climate (cold and prolonged winters), it is sometimes necessary to use solid fuel boilers (in the absence of gas). However, to use these, it is necessary to use biomass or biomass-coal blends as fuel to increase their combustion heat. The addition of biomass waste to coal can be aimed at achieving various objectives: utilization of biomass waste; reduction of solid fossil fuel consumption; improvement of environmental performance at coal-fired boiler houses; improvement of the reactivity of coals or to improve the technical and economic performance of heat-generating plants due to the fact that biomass is a waste from various types of production, and its cost depends only on the distance of its transportation to the boiler house. In this work, combustion of various biomass wastes, including sewage sludge, was carried out on a fire bench emulating the operation of a boiler furnace. Fuel particles were ignited by convective heat transfer in a stream of hot air at a velocity of 5 m/s in the temperature range of 500–800 °C, and the experimental process was recorded on a high-speed, color video camera. The obtained values were compared with the characteristics of different coals used in thermal power generation (lignite and bituminous coal). The aim of the work is to determine the reactivity of various types of biomass, including fuel mixtures based on coal and food waste. The work presents the results of technical and elemental analysis of the researched fuels. Scanning electron microscopy was used to analyze the fuel particle surfaces for the presence of pores, cracks and channels. It was found that the lowest ignition delay is characteristic of cedar needles and hydrolyzed lignin; it is four times less than that of lignite coal and nine times less than that of bituminous coal. The addition of hydrolysis lignin to coal improves its combustion characteristics, while the addition of brewer’s spent grain, on the contrary, reduces it, increasing the ignition time delay due to the high moisture content of the fuel particles.

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Section: Introductionmentioning

confidence: 99%

Experimental Combustion of Different Biomass Wastes, Coals and Two Fuel Mixtures on a Fire Bench

Zhuikov,

Zemlyanskiy,

Grishina

et al. 2024

Sustainability

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“…It is generalized enough to be highly practical and being presented in this form, it provides a good overview of the input and output data and its visualization. Previously, the authors focused on the available technologies mainly applicable to a heat pump [12], of which utilization showed that the energy-saving effect might be significantly improved but did not deal with raw operational data on electricity and gas demands. Saletti et al [13] consider not only simulation results but also operational data derived from the substation heat exchanger of the Skultuna buildings.…”

Section: Introductionmentioning

confidence: 99%

District Heating for Poorly Insulated Residential Buildings—Comparing Results of Visual Study, Thermography, and Modeling

Chicherin,

Zhuikov,

Junussova

2023

Sustainability

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Newer buildings have a lower but smoother profile of indoor temperature, while older buildings are less energy efficient. Sometimes, the indoor temperature is unreasonably high, being 25–30 °C. There are buildings where the indoor temperature does not correlate with the outdoor one. Correction factors adjusting convective heat transfer coefficients are suggested. Energy demand is defined using the rate of heat loss and internal heat gains for the given building construction and design consumption profile. We suggest adjusting the setpoints of the secondary supply temperature to keep indoor and return temperatures lower. Correcting a traditional approach when designing a building may minimize energy consumption by 23.3% and increase the annual performance by up to 14.1%. The reductions of thermal peak resulting from a new type of controller adjustment (for instance, discrete) compared to the traditional operation range from roughly 10 to 30%, respectively. A better understanding of the system operation is a necessary step to switch to fourth-generation district heating (4GDH). This methodology is especially helpful in shaving daily peaks of heat demand. Building envelopes ease the charging, maximum storage capacity, and balance of the given generation and demand profiles, which are key factors in achieving the reduction in greenhouse gas (GHG) emissions. Once the heat demand is covered according to the maximum storage capacity for the given generation and demand profile, fewer efforts to modernize a district heating network are required.

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4th generation district heating (4GDH) in developing countries: Low-temperature networks, prosumers and demand-side measures

Чичерин

Zhuikov

Junussova

2023

Energy and Buildings

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Integrating a heat pump into a 4th generation district heating (4GDH) system – Two-mode configuration inputting operational data

Cited by 4 publications

References 29 publications

Experimental Combustion of Different Biomass Wastes, Coals and Two Fuel Mixtures on a Fire Bench

Experimental Combustion of Different Biomass Wastes, Coals and Two Fuel Mixtures on a Fire Bench

District Heating for Poorly Insulated Residential Buildings—Comparing Results of Visual Study, Thermography, and Modeling

4th generation district heating (4GDH) in developing countries: Low-temperature networks, prosumers and demand-side measures

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