Energy Audit Process Research Articles

Analysis of the regulatory and legislative base of Ukraine and the European experience in conducting energy audits of buildings

The article analyzes the regulatory and legislative base for the energy efficiency of buildings. It identifies the main areas for improving energy efficiency by improving the process of energy audit, as well as improving the system of indicators that determine the airtightness of the building and preservation of comfortable conditions for human stay in the room. The relevance of the work is determined by the problem of low energy efficiency of the housing stock of Ukraine, which affects the rational consumption of energy, necessitates the introduction of various measures aimed at rationalizing energy use in general and buildings in particular, setting maximum permissible energy consumption rates for buildings and strengthening relevant control. The imperfection of the regulatory and legislative base in the field of energy efficiency, the need to develop a state standard for the design of buildings with increased air permeability, the development of a methodology for determining the air permeability of a building, the legislative establishment of minimum requirements for building airtightness, the development of a methodology for testing buildings for airtightness, and the imperfection of the methodology for conducting an energy audit of a building form the basis for further research. To improve the energy management of buildings, it is proposed to introduce mandatory testing of the building for airtightness, which will standardize approaches to energy management and compliance with the relevant requirements for building airtightness will lead to an increase in the energy efficiency class of buildings. Keywords: energy efficiency, energy audit, air permeability, airtightness.

Performance evaluation of deep learning algorithms for heat loss damage classification in buildings from UAV-borne infrared images

Deep learning (DL) algorithms are gaining popularity to automate anomaly detection in a variety of civil and mechanical engineering domains. Nevertheless, very few attempts have been made to use infrared (IR) images with DL algorithms to detect heat loss in a building and expedite the otherwise cumbersome energy audit process. However, no clear guidelines exist for the selection of appropriate algorithms or hyperparameters (e.g., number of epochs, learning rate, number of images) to implement DL with IR images. To address the research gap, a comparative sensitivity analysis of four well-known DL algorithms for the classification of heat losses using only IR images was performed for the first time. Four DL algorithms, namely, general convolutional neural network (CNN), VGG16, transfer learning (TL) VGG16, and TL inceptionV3 were selected and used for automating the detection of heat loss from IR images. The sensitivity of the selected CNN algorithms was analyzed based on i) the size of the IR images dataset, ii) the number of epochs, and iii) the effect of an unbalanced dataset. The goal was to provide a framework that may aid in the selection of suitable CNN architecture as well as parameters related to data size and an optimal number of training iterations for reliable heat loss identification using IR images. This article has provided a framework for automated heat loss detection that can be applied to any IR dataset without the need to pre-process the IR images. The accuracy of the selected DL algorithms is validated with IR images of laboratory setups and real-world buildings characterized by different types of defects. The comparative sensitivity analysis was conducted based on multiple performance indicators such as precision, recall, and F-1 score which resulted in optimal values of hyperparameters and the most suitable DL algorithm. The automated identification of heat loss yielded performance indicator values of more than 90%.

Analisis Audit Energi di Hotel Kota Malang Menggunakan Web-Based Monitoring System

Energy audits are evaluation activities carried out to determine the condition of the energy used in a system. Audits are carried out to provide the efficiency of an electrical system. The first energy audit conducted was the initial energy audit. By using the specifications of the installed electrical system and using monitoring data. Followed by a detailed energy audit, to determine the condition of a more specific electrical system. The data used is measurement/monitoring data, and data calculations are then compared with the provision of the electricity standard. In calculating the intensity of energy consumption in the initial energy audit process, the IKE Fave Hotel results were still by the standards with an IKE value of 213.59 kWh/m2. Meanwhile, based on the results of a detailed energy audit, it was found that the lighting system and cooling system were not up to standard because the lux results for several rooms showed results that were less than the lux standard. Thus, it is necessary to provide recommendations for improvements to the lighting and cooling system. Providing lighting recommendations can use dialux as a calculation comparison. In the lighting system, it is necessary to replace some of the lamp specifications installed because they are far from standard values. This also needs to be done on the cooling system, by replacing the installed air conditioner according to existing calculations. This replacement was carried out to save energy for the continuity of the hospitality industry process at Fave Hotel Malang.

ENERGY AUDIT AND POWER USAGE FOR OLEH CAMPUS, DELTA STATE UNIVERSITY, ABRAKA: A CASE STUDY

Energy audit process including the computation of energy per hour, day, week and calendar month used in Oleh campus ofDelta State University Abraka, was discussed in this paper. Energy waste and valuation and capability of savings were ascertained through walk-through energy audit. Similarly, comprehensive assessment of the data point compiled was ensured by proposing gainful methods for energy usage. The outcomes and other essential knowledge engendered were recorded. The energy auditing for a day is the indicator of the utilization that regulates crises by making available maintenance arrangements. The campus needs 20530.95 kW of electricity per hour costing N1, 113, 598.728. The running charges for a 4 hours power supply for Engineering and Law faculties and other areas in a year will amount to N53, 452, 738.944 resulting in the following break-down 34.7%, 20.5%, 17.3%, 11.7%, 15.8% engineering, law, hostels, administrative block and lodges consumption respectively

Implementation Analysis for Energy Audit Process at MSRTC Bus Station- A Review Research

Energy audit consists of survey, analysis and inspection of the energy flow in the system. Its aim is to find the scope of energy conservation by implementing energy saving procedures without affecting the outputs of the system. One such system which can conserve energy is MSRTC bus station which requires a lot of energy consumption for its everyday activities. Energy audit plays a significant role in finding opportunities to save energy and reduce electricity bills. Energy audit recommends ways to save energy consumption by some changes in the system with emphasis on that there are no negative output by the changes made. The Energy Audit would provide a positive orientation to the energy cost reduction along with preventive maintenance and quality control programs which are vital for production and utility activities.

Monitoring energy audit for energy savings using non cost technique at electronics company

Energy is essential element for economical growth in industry and it measures directly the standard of living for a country. The economical growth and energy demand in the modern society need to be reduced the energy consumption. In this paper, energy consumption was monitored and audited for an electronic company in Malaysia. The energy consumption was analysed based on electrical bill and then the power consumption has been verified based on energy audit process using power analyser for this electronic company. It is monitored that the energy audit for the whole company and point out the possiblity of non cost energy saving technique. From 10 locations analyses, 3 locations are main soursces contribite to high energy consumption. There are compressor room, busbar 15 and busbar 16 relates to chiller room that supply the air conditioning system in the company. The energy audit can provide the non cost suitable technique for energy savings and profit improvement in this electronic company.

An Integrated Energy and Environmental Audit Process for Historic Buildings

The valorization and sustainable management of historic centers is a topic relevant to the cultural identity and heritage of European cities. A rational strategy to preserve the centers must consider both energy and environmental retrofitting, even if this is a complex issue requiring interdisciplinary approaches, dedicated diagnostic procedures, and specific tools. Within this context, this paper proposes an integrated method for energy and environmental analysis specifically devoted to historical building retrofit. Attention is focused on cases in which building management is not interested in renovation or in a deep conservation project, but instead in green management and maintenance overhaul. The basis of the procedure is the Leadership in Energy and Environmental Design for Existing Buildings: Operations and Maintenance (LEED O+M) rating protocol. The global goal was the definition of an intervention strategy indicating the principal direction of action. The first step is identifying critical issues in the operation of the building through energy diagnosis and dynamic thermophysical simulations. The second step is defining a panel of appropriate retrofit measures. The third step is choosing between alternatives to increase the sustainability performance following an environmental assessment scheme. Ca’ Rezzonico in Venice (Italy), a 17th-century palace, nowadays the seat of a museum, was used as a case study to apply the proposed methodology.

Pengembangan Perangkat Lunak Efisiensi Energi di Gedung Ins. Kabupaten X, Banten

ABSTRACT Electrical energy is one of the necessities of life that are important to us, but excessive consumption of electrical energy will bring adverse effects. The effort that needs to be done for energy efficiency is to conduct an energy audit in the building. An energy audit is one way to find out whether the level of energy consumption in the building, whether included in the wasteful or efficient category. In conducting the energy audit process it is necessary innovation for data processing can be done quickly and cost-effectively. Data processing is done by making software applications, using Visual Studio program that is connected with Microsoft Access as data storage. From the results of the research, the value of Energy Use Intensity (EUI or IKE) in Building Ins, Banten is 3.84 kWh / m2 / month or 46.02 kWh / m2 / year. It belongs to the very efficient category which is where to standardize office building that is 240 kWh / m2 / year. The average lighting condition of each room is still below the standard, which is below 240 lux, while the average AC temperature condition is 24.40C, in general has an efficient performance. The results of testing software applications are known to run well, with fast operation and can produce accurate data. Keywords: Energy Audit, EUI, Energy Efficiency, Software Energy Audit

The energy audit process for universities accommodation in Malaysia: a preliminary study

The increase of energy consumption in the Malaysian Universities has raised national concerns due to the fact that its consumption increase government fiscal budget and at the same time contributes negative impacts towards the environment. The purpose of this research is to focus on the process of energy audit conducted in the Malaysian universities and to identify the significant practice that can improve energy consumption of the selected universities. The significant criteria in energy audit may be found by comparing the energy implementation process of selected Malaysian universities through the investigation of energy consumption behavior and the number of electrical appliances, equipment, machinery and buildings activities that have an impact on energy consumption that can improve energy-efficiency in building. The Energy Efficiency Index (EEI) will be used as an indicator and combined with the suggested application of HOMER software to obtain solution and possible improvement of energy consumption during energy audit implementation. A document analysis approach will also be obtained in order to identify the best practice through the selected energy documentations. The result of this research may be used as a guideline for other universities that consume high energy in order to help improving the implementation of energy audit process in their universities.

Energy Consumption and Energy Saving Measures in Poultry

Livestock buildings are energy consumers and aggravate the environment directly through their emissions and indirectly through the natural sources consumption. The contribution of energy consumption in the total production cost increases as the mechanization level and the conventional energy cost arises. In the present work the total energy consumption in poultries and its distribution according to the type of energy and the type of application is approached in two ways: a) The operational rating through the process of energy audit and, b) The asset rating where the thermal needs of the chambers are calculated using a source analytical explicit model in hourly time step. In terms of final energy consumption the energy per unit area ranges between 30 and 130 kWh/m2 and in terms of primary energy between 70 and 180 kWh/m2, depended on the chamber insulation, location and automation level. The insulation can contribute mostly in mountainous area and the automation level in lowland units. An insulation thickness of 4 to 5cm is recommended for lowland farms and 6cm for mountainous farms. Further insulation cannot offer benefit since ventilation heat losses represent significant percentage of the total heat losses and can be reduced with automatic ventilation control.

Energy Auditing in Cement Industry: A Case study

Industrial energy consumption lies between 30% and 70% of the total energy consumed in selected countries. Cement production is one of the most energy intensive industries all around the world. This paper deals with an energy audit analysis in a cement plant in Iran. In all recent works, after performing an energy audit, different strategies are offered to reduce energy losses. Generally, these strategies differ from the viewpoint of economics and their extent of loss reduction, which makes it difficult to choose one of them. In this paper, a decision-making procedure such as an analytic hierarchy process (AHP) after an energy audit process is proposed to help the decision maker in this process.

Energy Audit Methodology of Sponge Iron Manufacturing Units Using DRI Process

Conducting complete energy audit (both process and utility) of a sponge iron unit is challenging as there is no laid down procedure to audit the process side. Further, the average heat to power ratio (kWth/kWe) of sponge iron plants ranges from (25:1) to (31:1). This shows that the manufacturing process mostly uses thermal energy and application of electrical energy is insignificant. The main & only source of thermal energy is coal and the entire coal is fed to the rotary kiln. Therefore we find that “Kiln” is the “Black-Box” of this industry and the success of energy efficiency is hidden in the kiln process chemistry. This article tries to establish detailed energy audit methodology of sponge iron manufacturing process or kiln operation with a view to finding out major energy saving potential of the unit. In the research work we find that it is the incomplete reaction of coal that causes the major energy inefficiency in the process. Substantial amount of un-reacted carbon comes out with the char (by-product) which has virtually zero commercial value. The article also puts a question mark on the justification of using high-grade imported coal in such energy inefficient industries.

Energy audit of irrigation networks

The relationship between water and energy in water distribution systems (WDS) has been a growing concern among energy and water experts. Among the different strategies to improve water–energy efficiency in water distribution networks, energy audits are of paramount importance as they quantify water flow requirements, the amount of energy consumed to meet demand and leakage and friction losses. Previous work has presented the energy audit process for urban WDS and this energy audit is extended to irrigation networks here. This work analyses the most common types of irrigation emitters (sprinklers and pressure compensating and non-pressure compensating drippers), hydrant specifications, irrigation management systems (on-demand or rigid scheduled), and energy losses due to friction in pipes, control valves and irrigation hydrants. The energy audit does not assess whether management of the network is optimal, but analyses the energy consumption. Some of the performance indicators have already been defined for agricultural water networks, some are identical to those of urban WDS, but in addition, a new one is presented that disaggregates the energy dissipated into three terms, energy losses in pipelines, in hydraulic valves and in irrigation hydrants. These indicators show information necessary to better understand the performance of the irrigation network under study, to carry out a deep analysis of energy consumption and to allow for comparison with similar systems. The paper presents the analysis of a real case study conducted on the irrigation network of the garden of the Universidad Politecnica de Valencia.

Energy Audit And Energy Conservation Potential For Water Treatment Plant

This paper present energy audit process on water treatment plant in Lalpur, Jabalpur M.P, here more effective equipment use for water purification/water distributed to Jabalpur area. Water treatment plant has been highly energy and cost intensive. The water treatment plant requires 8760 h per year of the total operating hours to produce 35405 mld (million litter per day). To achieve effective and efficient energy management scheme, thermal energy audit analysis was employed on water treatment plant. The industrial sector is the largest users of energy around the world and its share in the overall consumption is 49%. Energy is one of the major inputs for the economic development of any country. In the case of the developing countries, the energy sector assumes a critical importance in view of the ever-increasing energy needs requiring huge investments to meet them.