scholarly journals Comparing the economics of electric and water underfloor heating

2021 ◽  
Vol 11 (1) ◽  
pp. 15-23
Author(s):  
Egor P. Bazunov ◽  
◽  
Valery Yu. Kravchuk
Keyword(s):  
Positive Impact ◽  
Heating System ◽  
Heat Emission ◽  
Continuous Heating ◽  
Heating Systems ◽  
Floor Area ◽  
Heated Floor ◽  
Research Findings ◽  
Domestic Design ◽  
Pipeline Design

Introduction. Using underfloor heating to maintain warm temperature inside manned rooms is a widely spread international practice. Domestic design organizations also take advantage of this solution, as it makes a positive impact on the indoor microclimate and thermal comfort. Underfloor heating outperforms traditional heating systems in terms of particular operational characteristics. The application of underfloor heating is a relevant issue, addressed by numerous publications, however, researchers tend to focus on the heat emission capacity of floors that have different constructions. The goal of this research is to analyze the economics of electric and water underfloor heating systems. Materials and methods. The aggregate cost method is employed to perform the economic analysis of underfloor heating systems. The co-authors have calculated capital and operating expenses, broken down by the years. The co-authors compare electric and water underfloor heating systems installed in the rooms having the floor area of 5, 10, and 20 sq. meters. The rooms are located in Moscow. Indoor heat losses are considered to be linearly dependent on the heated floor area. Results. The co-authors have calculated capital and operating expenses incurred in the above rooms. They have also drawn an aggregate heating cost graph for three rooms having two types of heating systems installed. The costs are broken down by the years. Conclusions. Although the research findings describe individual cases, they can serve as the basis for a general conclusion that the payback period of an underfloor heating system depends on the heated floor area and that electric underfloor heating systems are better for small rooms. Further studies can focus on alternative pipeline design systems, different power consumption modes of the pump depending on the circuit length, and non-continuous heating systems.

Pre-Heating Storage Design of Solar Heating System Based on SVM

2011 ◽  
Vol 320 ◽  
pp. 548-552
Author(s):  
Zhi Duan Cai ◽  
Wu Ming He ◽  
Pei Liang Wang ◽  
Shou Jiang Cai
Keyword(s):  
Large Scale ◽  
Heating System ◽  
Control Model ◽  
Solar Heating ◽  
Continuous Heating ◽  
Application Process ◽  
Start Time ◽  
Heating Systems ◽  
Storage Model ◽  
Heating Model

The heating model of pre-heating storage in advance during the valley period of electricity is proposed to solve the intermittent heating problem brought by large solar heating systems affected by change in climate and day and night or other factors. Aiming at best energy saving and the capability of continues heating of solar heating system, the SVM is applied to predict the start time, the highest temperature, the volume of water and other key parameters of the model. The solar heating system apply the pre-heating storage control model that has been trained to meet the practical requirements of different consumers and climate in the application process. Experimental results show that the pre-heating storage model can improve the energy efficiency of large solar heating system and the capacity of real-time continuous heating. The article provides a new control model with large-scale solar heating system.

scholarly journals Innovations in Housing and Communal Services to Increase Real Incomes of the Russian Population

2021 ◽  
pp. 146-157
Author(s):  
D. V. Shcherbakova ◽  
O. E. Ignashin
Keyword(s):  
Large Scale ◽  
Positive Impact ◽  
Residential Buildings ◽  
Private Investment ◽  
Heating System ◽  
Hot Water ◽  
Maximum Temperature ◽  
Winter Period ◽  
Heating Systems ◽  
Heat Networks

The article analyzes innovative technologies for heating residential buildings as an opportunity to solve the problems of housing and communal services in the country and a way to increase the real income of the population. The methods of statistical data analysis, the logical method, and the method of mathematical modeling are used. The problem under study is that the Russian economy has been experiencing a decline in real incomes for a long period of time. Coronavirus restrictions have exacerbated the existing trends. At the same time, a significant share of the expenses of Russians is the payment for utilities. Over the past 10 years, the cost of heating has risen by 80%. The lag of the Russian energy sector from the world indicators is due to several reasons: the low energy efficiency class of houses, significant wear and tear of heating networks, functional shortcomings of centralized heating, the lack of necessary federal and regional legislative acts, and the lack of private investment. At the same time, the centralized heating system has a number of unresolved problems related to the monopoly position of the industry: significant wear of pipelines of heat networks and heat generating equipment; limitations of the maximum temperature in the cold period; systematic exceeding of the value according to the temperature schedule in the warm period; poor quality of hot water supply in the winter period; late start of heating in the early cold; obsolete and extremely dangerous method of testing heat networks. It becomes obvious that there is a need for a radical modernization of the housing and communal sector with the introduction of fundamentally new heating systems and the development of energysaving technologies in the design, construction, and major repairs of residential buildings. The economic calculation of the use of an “Electro-converter heating system” on the example of a panel house of the 507 series showed that the annual savings in heating costs will be 79.5%. The payback period of the project is 11 years. The use of innovative systems of this type in the construction of new homes will pay off the investment much faster. The most acceptable mechanism for implementing such a project may be a public-private partnership. The use of public-private partnerships in the form of concession agreements in the construction of energy-efficient residential buildings and the introduction of innovative heating systems will create favorable conditions for the large-scale introduction of energy-saving technologies, which will have a positive impact on cost savings when paying for heating services and increase real incomes of the population.

Innovative electrotechnological systems to provide the temperature modes of technological pipelines

2019 ◽  
Vol 2 (1) ◽  
pp. 29-39 ◽  
Author(s):  
S. G. Konesev ◽  
P. A. Khlyupin
Keyword(s):  
Induction Heating ◽  
Thermal Exposure ◽  
Heating System ◽  
The Arctic ◽  
Process Conditions ◽  
Heating Systems ◽  
Fluid Properties ◽  
Low Efficiency ◽  
Extreme North ◽  
Induction Heating System

Introduction: the systems of thermal effects on thermo-dependent, viscous and highly viscous liquids under conditions of the Arctic and the Extreme North are considered. Low efficiency and danger of heating systems based on burned hydrocarbons, heated liquids and steam are shown. Electrothermal heating systems used to maintain thermo-dependent fluids in a fluid state are considered. The evaluation of the effectiveness of the application of the most common electrothermal system — heating cables (tapes). The most effective electrothermal system based on induction technologies has been determined. Materials and methods: considered methods of thermal exposure to maintain the fluid properties of thermo-dependent fluids at low extreme temperatures. Results: presents an induction heating system and options for its implementation in the Extreme North and the Arctic. Conclusions: induction heating system to minimize loss of product quality, improve the system performance under changing process conditions, eliminate fire product, to reduce the influence of the human factor.

scholarly journals Patent Value and Survival of Patents

2021 ◽  
Vol 7 (2) ◽  
pp. 119
Author(s):  
Jung-Tae Hwang ◽  
Byung-Keun Kim ◽  
Eui-Seob Jeong
Keyword(s):  
Family Size ◽  
Positive Impact ◽  
European Patent ◽  
Patent Data ◽  
Patent Value ◽  
Traditional Family ◽  
Ex Post ◽  
The Family ◽  
Research Findings ◽  
Private Value

This study investigated the effect of patent value on the renewal (survival) of patents. The private value of patents can be one of the main pillars sustaining a firm’s value, and the estimation of the value may contribute to the strategic management of firms. The current study aimed to confirm the recent research findings with survival analysis, focusing on the more homogeneous patent data samples. In this study, a dataset is constructed from a cohort of 6646 patents from the 1996 and 1997 application years, using patent data from the European Patent Office (EPO). We found that the family size and non-patent backward citations exhibited profound impacts on patent survival. This result is in line with numerous studies, indicating the positive impact of science linkages in the biotechnology and pharmaceutical fields. It was also found that the effect of the ex-post indicator is not as strong as the ex-ante indicators, like traditional family size and backward citations. In short, the family size matters most for the survival of patents, according to the current research.

scholarly journals Impacts on Indoor Thermal Comfort and Heating Energy Use in Hellenic Dwellings from Occupant Behavioral Reactions

2021 ◽  
Vol 11 (14) ◽  
pp. 6254
Author(s):  
Elena G. Dascalaki ◽  
Constantinos A. Balaras
Keyword(s):  
Thermal Comfort ◽  
Energy Use ◽  
Energy Savings ◽  
Local Heating ◽  
Economic Recession ◽  
Heating System ◽  
Building Stock ◽  
Heating Systems ◽  
Indoor Thermal Comfort ◽  
Energy Audits

In an effort to reduce the operational cost of their dwellings, occupants may even have to sacrifice their indoor thermal comfort conditions. Following the economic recession in Greece over recent years, homeowners have been forced to adapt their practices by shortening heating hours, lowering the indoor thermostat settings, isolating spaces that are not heated or even turning off their central heating system and using alternative local heating systems. This paper presents the results from over 100 occupant surveys using questionnaires and walk-through energy audits in Hellenic households that documented how occupants operated the heating systems in their dwellings and the resulting indoor thermal comfort conditions and actual energy use. The results indicate that the perceived winter thermal comfort conditions were satisfactory in only half of the dwellings, since the actual operating space heating periods averaged only 5 h (compared with the assumed 18 h in standard conditions), while less than half heated their entire dwellings and only a fifth maintained an indoor setpoint temperature of 20 °C, corresponding to standard comfort conditions. Mainstream energy conservation measures include system maintenance, switching to more efficient systems, reducing heat losses and installing controls. This information is then used to derive empirical adaptation factors for bridging the gap between the calculated and actual energy use, making more realistic estimates of the expected energy savings following building renovations, setting prudent targets for energy efficiency and developing effective plans toward a decarbonized building stock.

scholarly journals Technology Pathways and Economic Analysis for Transforming High Temperature to Low Temperature District Heating Systems

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3218
Author(s):  
Pedro Durán ◽  
Herena Torio ◽  
Patrik Schönfeldt ◽  
Peter Klement ◽  
Benedikt Hanke ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Renewable Energy ◽  
High Temperature ◽  
Low Temperature ◽  
Economic Analysis ◽  
District Heating ◽  
Heating System ◽  
District Heating System ◽  
Heating Systems ◽  
District Heating Systems

There are 1454 district heating systems in Germany. Most of them are fossil based and with high temperature levels, which is neither efficient nor sustainable and needs to be changed for reaching the 2050 climate goals. In this paper, we present a case study for transforming a high to low temperature district heating system which is more suitable for renewable energy supply. With the Carnot Toolbox, a dynamic model of a potential district heating system is simulated and then transformed to a low temperature supply. A sensitivity analysis is carried out to see the system performance in case space constrains restrict the transformation. Finally, an economic comparison is performed. Results show that it is technically possible to perform the transformation until a very low temperature system. The use of decentralized renewable sources, decentralized heat storage tanks and the placement of a heat pump on each building are the key points to achieve the transformation. Regarding the sensitivity analysis, the transformation is worth doing until the seasonal storage and solar collector field sizes are reduced to 60% and 80% of their values in the reference case, respectively. The economic analysis shows, however, that it is hard for highly efficient low temperature renewable based heat networks to compete with district heating systems based on a centralized fossile CHP solution. Thus, though the presented transformation is technically possible, there is a strong need to change existing economic schemes and policies for fostering a stronger promotion of renewable energy policies in the heat sector.

scholarly journals Auditors, Underwriters, and Firm Owners’ Interaction in an IPO Environment: The Case of OECD Nations

2021 ◽  
Vol 13 (11) ◽  
pp. 6281
Author(s):  
Sheela Sundarasen ◽  
Kamilah Kamaludin ◽  
Izani Ibrahim ◽  
Usha Rajagopalan ◽  
Nevi Danila
Keyword(s):  
Positive Impact ◽  
Common Law ◽  
Civil Law ◽  
Least Square ◽  
Interactive Effects ◽  
Cross Sectional ◽  
Key Stakeholders ◽  
Research Findings ◽  
Firm Owners ◽  
The Relationship

This study explores the effects of interactions among key stakeholders, i.e., auditors, underwriters, and firm owners on IPOs’ first-day returns in selected OECD nations. It also examines the alteration effects of legal origin (Common law and Civil law) on the relationship between the interacted key stakeholders and IPOs’ first-day returns. A total of four thousand one hundred and sixty-four IPOs from twenty-eight OECD nations are included in this study. Since it is cross-sectional data, a two-stage least square regression is applied. The empirical outcomes indicate that, in general, the interacted reputable underwriters and auditors have a positive impact on IPOs’ first-day return. The relationship is modified between common law and civil law nations, whereby in civil law nations, no significance is demonstrated except for the interaction between the reputable auditors and underwriters. In the common law nation, interactions between reputable auditors and ownership retention have an impact on IPOs’ first-day return. The research findings provide outlooks into an IPO framework for issuers, investors, and regulators. Issuers may want to weigh carefully the costs and benefits of hiring credible auditors and underwriters when going public as they act as signaling agents. As for the investors, they should take into consideration the involvement of reputable underwriters and auditors and the degree to which the IPO firms retain ownership, as the interactive effects give clear signals on firm valuation and IPOs’ first-day returns. Regulators may find the findings informative concerning the creation of a more organized regulatory and financial system that could lead to a deeper and more open financial market.

scholarly journals How to Improve Effectiveness of Renewable Space Heating Programs by Better Understanding Homeowner—Installer Interactions

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4625
Author(s):  
Alisa Freyre ◽  
Stefano Cozza ◽  
Matthias Rüetschi ◽  
Meinrad Bürer ◽  
Marlyne Sahakian ◽  
...  
Keyword(s):  
Literature Review ◽  
Financial Incentives ◽  
Heating System ◽  
Heat Pumps ◽  
Single Family ◽  
Heating Systems ◽  
Current State ◽  
Ex Post ◽  
Improved Technology

In this paper, we perform a literature review on the current state of knowledge about homeowners in the context of the adoption of renewable heating systems. Despite a considerable number of studies about homeowners, homeowner–installer interactions, and ways to improve the effectiveness of renewable heating programs, based on homeowner knowledge, have not yet been studied in much detail. To address these knowledge gaps, we conduct a qualitative study on single-family house owners who installed heat pumps and took part in a renewable heating program in Geneva, Switzerland. We cover homeowner practices in choosing installers and heating system types, homeowners’ feedback about heat pump installation and use, as well as their experience in participation in the renewable heating program. Based on the literature review and the findings from the interviews, we provide the following recommendations on how to increase the effectiveness of renewable heating programs: (a) support for homeowners should not be limited to financial incentives; (b) partnership programs with installers could help to increase the quality of installation services and enable homeowners to choose qualified installers; and (c) assisting homeowners in pre-qualification and ex-post analysis, in learning how to operate their renewable heating systems and in solving problems during the post-installation period, can contribute to improved technology reputation, which can, in turn, increase technology uptake by other homeowners.

scholarly journals METHODOLOGY OF THE PRIMARY DATA RECONSTRUCTION OF SINGLE PIPE HEATING SYSTEMS/VIENVAMZDŽIŲ ŠILDYMO SISTEMŲ PIRMINIŲ DUOMENŲ NUSTATYMO METODIKA

1999 ◽  
Vol 5 (5) ◽  
pp. 318-322
Author(s):  
Edvardas Tuomas ◽  
Saulius Neverbickas
Keyword(s):  
World War Ii ◽  
District Heating ◽  
Heating System ◽  
Heat Fluxes ◽  
Primary Data ◽  
Complex Coefficient ◽  
Heating Systems ◽  
Pipe System ◽  
Central Heating ◽  
Single Pipe

The majority of dwellings in Lithuania are situated in blocks of flats. The dwellings were built after World War II and they are heated by single pipe central heating systems, connected to district heating. The dwellers are not quite satisfied with such a heating system and try to improve it, but do that in a wrong way, by increasing the surface of radiators. Such means lead to violation of thermal regime and comfort conditions for other dwellers. There exists sometimes the necessity of reconstructing premises and together—the heating system. During the reconstruction the primary heat fluxes from radiators should be known, but very often such data are lost and only the size of radiators (number of sections) are known. To reconstruct the required primary data for single pipe systems is complicated because the temperatures of inlet and outlet water for radiators are unknown. In this article the methodology is proposed how to perform the calculations leading to the required data. The aim of calculations is the establishment of heat fluxes from each radiator connected to the riser. Heat flux from radiator can be calculated according the formula (1) but the complex coefficient is unknown. It could be found from formulae (2) but some magnitudes are unknown. According to the proposed methodology the values of unknown magnitudes are taken approximately and calculations are performed with iterations. In such a way the flow rate of water in riser is established from formula (3), which is the same for each radiator (the property of single pipe system). From formulas (3) and (4) an equation is produced (5), and is used for calculations of unknown temperatures. The equation (6) is used for calculation of heat fluxes from radiators. To carry out the above-mentioned calculations without computer practically is impossible due to many cycles of iteration. The programme was prepared to make easy all these calculations. The scheme of algorithm of programme is given in Fig 1. An example of calculation is given in this article. Calculations were fulfilled by newly created programme. The riser chosen for calculation is shown in Fig 2. The results of calculation are given in Table 1. The table shows that according to the proposed methodology the programme based on it can be used for reconstruction of primary data of single pipe heating systems successfully.

scholarly journals PRESERVATION OF STOVE HEATING IN A WOODEN HOUSE BUILT IN THE 19–20th CENTURIES IN TOMSK

2020 ◽  
Vol 22 (1) ◽  
pp. 63-74
Author(s):  
T. Yu. Reznichenko
Keyword(s):  
Design Methodology ◽  
Historical Review ◽  
Published Data ◽  
Rapid Loss ◽  
Heating Systems ◽  
Engineering Equipment ◽  
Wooden House ◽  
Research Findings ◽  
Practical Implications

Purpose: The aim of this work is to identify and collect the data on the engineering equipment routinely used for stove heating, which possesses a unique architectural potential determining its typology and preservation. Design/methodology/approach: In addition to a fullscale study, the historical review is given. This study determines the principles the stove arrangement in wooden houses. Research findings: A rapid loss of both historical wooden houses and stove heating systems is shown, which are considered to be the key elements for maintaining a valuable historical environment. A need for determining the causes of the destruction and loss of historical houses is shown. Originality/value: The research includes the not yet published data on historical houses, in particular, at the address 33, October street, Tomsk, Russia, built in the 19– 20th centuries, which is of high architectural potential. Practical implications: The results can be used in preservation of engineering equipment of stove heating in historical wooden houses.

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