Does the Balance Exist between Cost Efficiency of Different Energy Efficiency Measures? DH Systems Case

Pakere, Ieva; Lauka, Dace; Blumberga, Dagnija

doi:10.3390/en13195151

Cited by 10 publications

(3 citation statements)

References 20 publications

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“…This is mainly due to On further Improving the Financial Subsidy for Promoting New Energy Vehicles, a policy document issued by the Chinese Ministry of Finance in March, 2019. The new policy cancelled local subsidies and reduced national subsidies, and this stringent financial policy hindered the development of new energy enterprises in the short term because high operating costs remained a bottleneck for their development, which agrees with the findings of Pakere et al [93]. Since 2020, the overall growth ratings have showed an upward trend.…”

Section: Growth Level Of New Chinese Energy Enterprisessupporting

confidence: 85%

Does Technological Innovation Efficiency Improve the Growth of New Energy Enterprises? Evidence from Listed Companies in China

Chen,

Li,

Zhang

et al. 2024

Sustainability

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With the implementation of “carbon peaking and carbon neutrality” in China, new energy enterprises, as the vanguard in this strategy, have entered a new era of innovation-driven development. However, enterprises at different lifecycle stages will face different internal and external conditions, and there are differences in their internal mechanisms and business performance. In this case, whether technological innovation efficiency can have an obviously positive effect on their growth and what different effects it can have for enterprises at different lifecycle stages have become issues of great concern to company management, investors, governments, and other stakeholders. This research takes 81 new Chinese energy enterprises as the research objects. First, they are divided into growing, mature, and declining enterprises based on the cash flow combination method. Then, their technological innovation efficiencies from 2016 to 2021 are calculated based on the stochastic frontier method and their growth evaluations are performed by taking both financial and non-financial indicators into consideration. Finally, by taking mediating effects into consideration, the heterogeneity effects of technological innovation efficiency on their growth are studied from the perspective of enterprise lifecycles based on the fixed-effect model. The research results indicate that the technological innovation efficiency of new Chinese energy enterprises has fluctuated around 0.90 in recent years, and is generally at a high level. The efficiency ranking of enterprises at different lifecycle stages is mature period > growing period > declining period. Technological innovation efficiency has a positive impact on their growth, and market share plays a mediating role in this process. The effects of technological innovation efficiency on enterprises at different stages are different, with growing and mature enterprises showing a positive impact. Growing enterprises are more affected by technological innovation efficiency due to their demand for innovation-driven development, while declining enterprises often face difficulties such as unstable operating conditions and outdated equipment, and unreasonable technological innovations may actually accelerate their decline.

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Section: Growth Level Of New Chinese Energy Enterprisessupporting

confidence: 85%

Does Technological Innovation Efficiency Improve the Growth of New Energy Enterprises? Evidence from Listed Companies in China

Chen,

Li,

Zhang

et al. 2024

Sustainability

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“…𝐶 represents the quantity of carbon emissions that were It is possible to calculate the greenhouse gas emissions from a building's entire production process using the carbon output of a single structure. This paper breaks down the building life cycle into four stages: manufacturing of building materials, building construction, building usage and maintenance, and building demolition, and then calculates the carbon emissions associated with each stage [25,26]. The calculation equation for carbon accounting across a building's whole life cycle is shown in Equation ( 8):…”

Section: Carbon-neutral Energy Efficiency Model Of Whole Life Cycle B...mentioning

confidence: 99%

Energy Efficiency Model Construction of Building Carbon Neutrality Design

Zheng

Long

et al. 2023

Sustainability

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We aim to create a feasible quantitative method to calculate the energy efficiency of building designs that are carbon-neutral and to develop a workable way of calculating energy efficiency in buildings that achieve carbon neutrality and the system for such a building’s design energy efficiency function. This paper first clarifies the idea of the design energy efficiency function for a carbon-neutral building over its whole life cycle. Subsequently, through the efficient analysis of carbon-neutral design dimension measures, this paper summarizes and integrates the mature theories of various disciplines, puts forward the energy efficiency function model of carbon-neutral design background, propulsion, and coverage, and implements the energy efficiency function model of carbon-neutral design in the whole life cycle of buildings. The index value of a building’s carbon emission factor is established based on the carbon accounting factor published by the Intergovernmental Panel on Climate Change, and a carbon neutrality energy efficiency model for buildings over the duration of their whole life cycle is constructed. The results were as follows. 1. Technology energy efficiency is far better than scale energy efficiency and comprehensive energy efficiency. 2. The better the energy efficiency value inside the building stage, the less consumption and the higher the production. 3. Construction is when technical energy is used the least. This paper refers to a systematic design method that makes the level of building carbon neutrality design technologically advanced with the aid of all types of big data related to the building life cycle and various innovative design theories in order to fully represent the fundamental level, development potential, and the effectiveness of choosing the strategy of building carbon neutrality.

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“…The consumers with low power factors are penalized with tariff clauses. For a constant active power, if the power factor decreases, the required apparent power and the electrical system losses increase [15,[38][39][40][41][42]. Nonlinear loads generate harmonic currents.…”

Section: Introductionmentioning

confidence: 99%

Considerations on Current and Voltage Unbalance of Nonlinear Loads in Residential and Educational Sectors

2020

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Most often, electrical consumers in the residential and educational sectors are different from industrial electrical consumers. Whereas the vast majority of industrial electrical consumers are low-voltage, three-phase (with three or four wires), electrical consumers in the residential and educational sectors are low-voltage, single-phase. However, in practice, electrical consumers in the residential and educational sectors are in large numbers. Usually, current and voltage unbalances are lower in the industrial sector compared to the residential and educational sectors, where there are a large number of low-voltage, single-phase consumers that are connected/disconnected in an uncontrollable way and that need to be wired and balanced on each phase of power transformers from power substations. The purpose of this paper is to present the results of electrical balance and improve the power factor in the power substation from residential and educational sectors. The paper investigates the current and voltage unbalance of nonlinear con sumers in the residential and educational sectors. For this purpose, we performed measurements in the laboratory and the power substation to investigate the unbalance in the three-phase system. Laboratory measurements were made in the unbalanced operation of the single-phase electrical consumers connected at three-phase system. The measurements from power substation were carried out after the electrical consumers were uniformly spread among the three phases from the low-voltage power network, on two different days: a workday and a weekend day. The current and apparent power unbalance were reduced and the power factor was improved using the capacitive single-phase electric consumers (e.g., personal computers, which are in large numbers in such sectors) evenly across the phases.

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Does the Balance Exist between Cost Efficiency of Different Energy Efficiency Measures? DH Systems Case

Cited by 10 publications

References 20 publications

Does Technological Innovation Efficiency Improve the Growth of New Energy Enterprises? Evidence from Listed Companies in China

Does Technological Innovation Efficiency Improve the Growth of New Energy Enterprises? Evidence from Listed Companies in China

Energy Efficiency Model Construction of Building Carbon Neutrality Design

Considerations on Current and Voltage Unbalance of Nonlinear Loads in Residential and Educational Sectors

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