scholarly journals ENERGY OPTIMIZATION OF INDUSTRIAL STEAM BOILER USING ENERGY PERFORMANCE INDICATOR

2019 ◽  
Vol 9 (6) ◽  
pp. 109-117
Author(s):  
Guillermo Valencia Ochoa ◽  
Jhan Piero Rojas ◽  
Juan Campos Avella
Keyword(s):  
Performance Indicator ◽  
Energy Optimization ◽  
Energy Performance ◽  
Steam Boiler

scholarly journals Perancangan sistem manajemen energi pada industri manufaktur berdasarkan ISO 50001:2011

2020 ◽  
Vol 12 (1) ◽  
pp. 88
Author(s):  
Taufik Ridwan
Keyword(s):  
Energy Management ◽  
Distribution System ◽  
Management System ◽  
Manufacturing Industry ◽  
Energy Savings ◽  
Energy Performance ◽  
Energy Management System ◽  
Steam Boiler ◽  
System Implementation ◽  
Self Assessment

As one manufacturing industry with a large level of energy consumption makes energy management mandatory applied at PT. XYZ, the purpose of this research is to design energy management system implementation strategy in PT. XYZ based on ISO 50001. Started by self assessment and by collecting data on the use of primary energy sources in the company, followed by processing and analyzing using simple linear regression. The self assessment results show 38% of the total value’s completeness of existing program in the clause of ISO 50001. From the processing and analyzing’s energy usage showed energy baseline and energy performance indicators (EnPI) of the company. The result of research is identifies and proposes the potential of energy savings in air compressor distribution system, steam boiler distribution, and electrical distribution system with good housekeeping, control system, and modification, proposes the energy management system implementation based on Deming’s PDCA cycle, and continued by recommending roadmap towards the implementation of energy management systems. 

scholarly journals Factors affecting the deep renovation of a single-family building – a case study

2021 ◽  
Vol 246 ◽  
pp. 05004
Author(s):  
Triinu Bergmann ◽  
Aime Ruus ◽  
Kristo Kalbe ◽  
Mihkel Kiviste ◽  
Jiri Tintera
Keyword(s):  
Energy Efficiency ◽  
Performance Indicator ◽  
Energy Performance ◽  
Resource Efficiency ◽  
Final Decision ◽  
Air Leakage ◽  
Single Family ◽  
Building Stock ◽  
Thermal Transmittance ◽  
Family Building

The Energy Performance of Buildings Directive (EPBD) of the EU states that Each Member State shall establish a long-term renovation strategy to support the renovation of building stock into a highly energy efficient and decarbonised building stock by 2050. The motive for the study was the dissatisfaction of inhabitants of a single-family building about the heating costs and thermal discomfort. In this study both the emotional and resource efficiency aspects were considered. The structures and technical systems of the studied small dwelling are typical of representing single-family buildings of the Estonian building stock. The initial purpose was to improve the energy efficiency of a building while preserving the existing load bearing structures as much as possible. The research questions were: 1) what the situation before the renovation was, 2) what solutions can be used, 3) making decisions, whether to renovate or demolish. Calculations were carried out – the thermal transmittance of the envelope structures was calculated based on the construction information, and the linear thermal transmittance of geometrical thermal bridges was calculated by using the software Therm. Field tests performed - the thermography and the air leakage of the building was found by standard blower-door test. Specific air leakage rate qE50=11.1 m3/(hm2) was estimated. A renovation solution was offered considering the need for extra insulation and airtightness. The dwelling energy performance indicator was reduced from the existing 279 kWh/(m2y) to 136 kWh/(m2y). For significant energy efficiency improvement deep renovation measures must be used and the question was whether it is rational. Before making the final decision, several aspects have to be considered: 1) emotional – the demolition or renovation of somebody’s home, 2) environmental aspects and resource-efficiency – the possibilities of the reuse of materials.

Estimate of Energy Performance Indicator of Existing Single-Family Houses in Bosnia and Herzegovina

2020 ◽  
pp. 244-260
Author(s):  
Darija Gajić ◽  
Erdin Salihović ◽  
Nermina Zagora
Keyword(s):  
Bosnia And Herzegovina ◽  
Urban Areas ◽  
Performance Indicator ◽  
Energy Performance ◽  
Building Envelope ◽  
Single Family ◽  
Existing Building ◽  
Statistical Estimates ◽  
Rural And Urban ◽  
Collective Housing

Yielding from an overall quantitative study of the residential sector of Bosnia and Herzegovina (B&H), this chapter concentrates on the ratio between single-family and collective housing, as well as on the urban-rural ratio of the single-family housing. Based on the data from the existing building stock (buildings built by 2014) and the statistical estimates, 23% of the buildings belong to the urban areas and 77% belong to the rural areas. The main goal was to study the correlation between the characteristics of the building envelope, the shape factor (A/V ratio) and the energy savings potential for the application of conventional measures of refurbishment of the building envelope of the single-family houses (type of buildings, which dominate in rural and urban areas). The chapter wraps up with recommendations for the adequate level of the energy performance indicator (energy need for heating) for the approved energy class for single-family houses located in the climate zone of the northern B&H.

scholarly journals Annual performance analysis of heat emission in radiator and underfloor heating systems in the European reference room.

2019 ◽  
Vol 111 ◽  
pp. 04009
Author(s):  
Karl-Villem Võsa ◽  
Andrea Ferrantelli ◽  
Jarek Kurnitski
Keyword(s):  
Performance Indicator ◽  
Energy Performance ◽  
Heat Emission ◽  
Test Facility ◽  
Climate Data ◽  
Energy Usage ◽  
Operative Temperature ◽  
Heating Systems ◽  
Emission Efficiency ◽  
University Of Technology

In this paper, we investigate the energy usage and emission efficiency of radiator and underfloor heating systems coupled with ON/OFF and PI controls, by performing annual simulations with the IDA ICE software package. Results from measurements carried out in early 2018 at the nZEB test facility near the Tallinn University of Technology are used to calibrate validated emitter and controller models. The calibrated models are then used to assess the energy performance of the systems in a simulation spanning the whole year, using climate data for Strasbourg in the European reference room. The annual simulation is conducted in a specific room with fixed geometry and boundary conditions. As a novelty value of the present study, we impose a non-standard control strategy based on maintaining a specified operative temperature within the room. A single-valued performance indicator, in the form of an increased air temperature set-point, is accordingly obtained for each emitter configuration to be used in further calculations of hourly, monthly or annual heating energy usage. Such a temperature increment accounts for imperfect control, air stratification within the room and the additional temperature increase that is required for achieving a desired operative temperature.

scholarly journals Involvement of Individuals in the Development of Technical Solutions and Rules of Management for Building Renovation Projects: A Case Study of Latvia

2017 ◽  
Vol 54 (4) ◽  
pp. 3-14
Author(s):  
I. Pukite ◽  
A. Grekis ◽  
I. Geipele ◽  
N. Zeltins
Keyword(s):  
Energy Efficiency ◽  
Performance Indicator ◽  
Energy Performance ◽  
Project Planning ◽  
Planning Stage ◽  
Mutual Cooperation ◽  
Apartment Buildings ◽  
Technical Specifications ◽  
Technical Solutions

Abstract In March 2016, the Latvian government approved a new support program for increasing energy efficiency in residential apartment buildings. For the support of renovation of apartment buildings in the period from 2016 to 2023, 166 470 588 EUR will be available. Different persons, such as energy auditors, designers, architects, project managers and builders, will be involved in the process of planning, development and implementation of building renovation. At the development stage of the building renovation project, special attention should be devoted to the first stage – energy audit and technical project development. The problem arises due to the fact that each of these individuals, during the development of technical building documentation, does not work as a completely unified system. The implementation of construction project planning and organisational management system is one of the most important factors to guarantee that the quality of building renovation project is ensured in accordance with the laws and regulatory standards. The paper studies mutual cooperation, professionalism and the role of information feedback of personnel involved in the planning stage of building renovation, which is an essential prerequisite for the renovation process in order to achieve high quality of work and reduce the energy performance indicator. The present research includes the analysis of different technical solutions and their impact on energy efficiency. Mutual harmonisation of technical specifications is also investigated.

scholarly journals Matrix method to solve inverse problem of heat transfer in heat exchangers with phase transition in heat carriers

Vestnik IGEU ◽  
2021 ◽  
pp. 68-75
Author(s):  
A.E. Barochkin
Keyword(s):  
Heat Transfer ◽  
Phase Transition ◽  
Inverse Problem ◽  
Heat Exchangers ◽  
Power Plants ◽  
Thermal Power ◽  
Energy Performance ◽  
Steam Boiler ◽  
Resource Saving ◽  
Heat Carriers

The transition to environmentally friendly and resource-saving energy, efficient use of natural resources and energy performance are the key priorities of the state energy policy of the Russian Federation. Maximum use of heat combustion of fuel and simultaneously production of condensate water of the combustion products of natural gas is one of the directions of energy saving policy. Despite many scientific papers on the issues of utilization of flue gas heat, condensation heat exchangers are not used in most gas boiler houses, energy power providers and thermal power plants in this country. And there are several reasons to explain this fact due to the lack of universal methods to calculate and design condensation-type heat exchangers. Thus, the development of new methods to simulate multithreaded heat exchangers considering the phase transition in heat carriers is an urgent task of power engineering and industry sectors. Matrix models of heat transfer based on mass and energy balance equations are applied to solve the inverse problem of heat transfer in heat exchangers, considering the phase transition in heat carriers. A method to calculate and select the designs of multi-threaded heat exchangers, considering the phase transition in heat carriers, has been developed. The author suggests a numerical solution to choose the design of a contact economizer of a heat power plant steam boiler used for heat recovery of flue gases to illustrate the effectiveness of the proposed method. The proposed method to solve the inverse problem of heat transfer provides the possibility to identify simultaneously the most acceptable values of the parameters of heat carriers and design characteristics of heat exchangers for various purposes.

Developing a new energy performance indicator for the spindle system based on power flow analysis

2018 ◽  
Vol 233 (6) ◽  
pp. 1687-1699
Author(s):  
Zhendong Shang ◽  
Dong Gao ◽  
Zhipeng Jiang ◽  
Yong Lu
Keyword(s):  
Energy Efficient ◽  
Machine Tools ◽  
Power Flow ◽  
Performance Indicator ◽  
Flow Analysis ◽  
Energy Performance ◽  
Power Requirement ◽  
Spindle System ◽  
Power Flow Analysis ◽  
Efficient Machine

The evaluation of the energy performance of spindle systems with a proper metric is extremely important for energy-efficient machine tools. However, there is a lack of appropriate index to achieve this evaluation. To close this gap, the additional power requirement, which is defined as the discrepancy between the material removal power and the power gap of the spindle system from air-cutting state to cutting state, was proposed as a new indicator based on a detailed power flow analysis. The additional power requirement universally exists in machining and results from the efficiency and power losses of the system, which makes it a good energy performance indicator candidate. A theoretical model for the additional power requirement of spindle systems was built and verified in a lathe machine, through which two causes of additional power requirement were pointed: less than 100% efficiency throughout the system and efficiency change of the spindle motor under a dynamic load and a variable speed. The first cause has a positive effect on the additional power requirement, whereas the second one generally plays a negative role. Furthermore, the additional power requirement can be negative because of the negative effect, which is different from previous studies. The close relation between the additional power requirement and the energy performance of the spindle is demonstrated by an in-depth analysis. This work is an important building block for energy-efficient machine tools.

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