scholarly journals Energy Efficiency Indicators for Water Pumping Systems in Multifamily Buildings

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7152
Author(s):  
Danilo Ferreira de Souza ◽  
Emeli Lalesca Aparecida da Guarda ◽  
Ildo Luis Sauer ◽  
Hédio Tatizawa
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Design Guidelines ◽  
Pump Efficiency ◽  
Electric Motors ◽  
Centrifugal Pumps ◽  
Pumping System ◽  
Water Pumping ◽  
Definition Of ◽  
Multifamily Buildings

With the current concerns about sustainable development and energy consumption in buildings, water pumping systems have become essential for reducing energy consumption. This research aims to develop guidelines for the energy assessment of water pumping systems in multifamily buildings. The methodological procedures are: (i) definition of the efficiencies of electric motors; (ii) definition of pump efficiency levels; (iii) determination of energy consumption; and (iv) construction of the efficiency scale and guidelines for projects and assessments. The results obtained were that centrifugal pumps with 40% efficiency have higher energy consumption, regardless of the efficiency class of the electric motors, showing a 20% increase in electrical energy consumption. Lower efficiencies directly impact the energy efficiency rating of the water pumping system. Thus the 40% efficiency obtained energy efficiency rating “Very Low—VL” for all motor efficiency classes (between IE1 and IE5). At 60% efficiency, the energy efficiency level of the system was “Average—A”, gradually increasing to “Very High—VH”, as the energy consumption in the pumps decreased and the motors’ energy efficiency classes increased. It is concluded that designers and professionals in the area must consider the efficiency of the pumps, as they play a fundamental role in the classification of the system’s energy efficiency. It is also recommended to verify the energy efficiency of the water pumping system and implement design guidelines so that the pumping system achieves lower energy consumption, contributing to the building’s energy efficiency and sustainability.

Enhancing the Performance of Solar Photovoltaic Water Pumping System by Water Cooling Over and Below the Photovoltaic Array

2019 ◽  
Vol 142 (2) ◽  
Author(s):  
Arunendra K. Tiwari ◽  
Vimal C. Sontake ◽  
Vilas R. Kalamkar
Keyword(s):  
Performance Enhancement ◽  
Climatic Conditions ◽  
Pump Efficiency ◽  
Solar Photovoltaic ◽  
Water Cooling ◽  
Cell Temperature ◽  
Photovoltaic Array ◽  
Pumping System ◽  
Water Pumping ◽  
Institute Of Technology

Abstract Lower operating temperatures of the photovoltaic (PV) cells increase the performance and efficiency of any PV installation. The efficiency of solar photovoltaic water pumping system (SPVWPS) decreases considerably with the increase in the PV cell temperature. In this paper, the performance of a 2 hp SPVWPS has been investigated experimentally, for the influence of panel cooling, using water. The experimental observations have been made under climatic conditions of Visvesvaraya National Institute of Technology, Nagpur campus, India, during the year 2018. The performance was evaluated under four different cases: (a) without panel cooling, (b) with water cooling on the top of the panel surface, (c) with water cooling on beneath the surface of the panel, and (d) with water cooling beneath the surface of the panel using jute. The effect of different cooling cases on the various performance parameters such as discharge, power output, pump efficiency, and system efficiency has been analyzed and discussed. The results showed that the water cooling on the top of the panel and beneath the surface of the panel with jute has considerable influence on performance enhancement when compared with other cases.

scholarly journals Energy Efficiency Analysis of Fixed-Speed Pump Drives with Various Types of Motors

2019 ◽  
Vol 9 (24) ◽  
pp. 5295 ◽  
Author(s):  
Victor Goman ◽  
Safarbek Oshurbekov ◽  
Vadim Kazakbaev ◽  
Vladimir Prakht ◽  
Vladimir Dmitrievskii
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Duty Cycle ◽  
Induction Motors ◽  
Electric Motors ◽  
Pump Unit ◽  
Permanent Magnet Synchronous Motors ◽  
Variable Flow ◽  
Synchronous Motors ◽  
Flow Pump

The paper presents a comparative analysis of energy consumption by 2.2 kW electric motors of various types and energy efficiency classes in the electric drive of a pump unit with throttle control in a water supply system. Line-start permanent-magnet synchronous motors of the IE4 energy efficiency class and induction motors of the IE4 and IE3 energy efficiency classes of various manufacturers were considered (IE4 and IE3 are labels of energy efficiency classes of electric motors according to IEC 60034-30-1 standard). Energy consumption at a hydraulic load changing under a typical duty cycle was calculated based on the nameplate data of the pump and electric motors. The developed method shows that selecting an electric motor based on the IE energy efficiency class under the IEC 60034-30-1 standard (i.e., based on efficiency at a rated load) may not provide the minimum energy consumption of a variable flow pump unit over a typical duty cycle. In particular, the considered IE4 class line-start permanent-magnet synchronous motors do not provide significant advantages over IE4 class induction motors, and sometimes even over IE3 class induction motors when they are used in variable flow pump units.

scholarly journals Approach to defining the object of energy efficiency assessment in industry

2021 ◽  
Vol 263 ◽  
pp. 05042
Author(s):  
Natalia Verstina ◽  
Natalia Solopova ◽  
Tatiana Meshcheryakova ◽  
Natalia Taskaeva ◽  
Natalia Shchepkina
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Practical Significance ◽  
Industrial Building ◽  
Industrial Facility ◽  
Industrial Facilities ◽  
Efficiency Assessment ◽  
Research Problems ◽  
Scientific Project ◽  
Definition Of

A scientific project focused on the development of a methodology for assessing energy efficiency classes of industrial facilities identified the primary research problems. The first and most important of them is the absence of a categorical and conceptual apparatus in the field of energy efficiency in industry, both in the Russian Federation and at the global level. This fact limits the definition of the system of indicators in the diagnosis of energy consumption. The study analyzed the definitions of an industrial facility contained in the current legislative and regulatory documents, as well as related assessment categories, such as: an industrial building and an industrial enterprise. The lack of unity in the definition of the identified categories, and in some cases their contradiction, demanded clarification of the category “industrial facility” as an object of diagnostics of energy consumption in industry, within the framework of an expert survey with the involvement of Russian and foreign experts in the field of energy. The practical significance of the results of the study is that the clarification of the category “industrial facility” is an integral attribute of the process of developing a methodological framework for assessing energy efficiency in industry, affecting its substantive part.

scholarly journals Optimization of the Pumping Capacity of Centrifugal Pumps Based on System Analysis

2021 ◽  
Vol 347 ◽  
pp. 00024
Author(s):  
Motsi Ephrey Matlakala ◽  
Daramy Vandi Von Kallon
Keyword(s):  
System Analysis ◽  
Fluid Dynamic ◽  
Operating Cost ◽  
Maximum Flow ◽  
Maintenance Cost ◽  
Pump Efficiency ◽  
Centrifugal Pumps ◽  
Pump Operation ◽  
Head Losses ◽  
Pumping System

The pumping capacity is the maximum flow rate through a pump at its design capacity. In the process of pumping water and other fluids, pumping capacity is required to accurately size pumping systems, determine friction head losses, construct a system curve and select a pump and motor. Failure to choose the right pump size for pumping system, improper installation and pump operation results into higher consumption of energy. The insufficient pumping capacity affects the plant’s operations such as maintenance cost, downtime, loss of production and increase in operating cost. In this study variation of the impeller diameter is used to calculate the new pump curve to improve the pumping capacity. The pumping system is analysed to determine the pumping capacity of the pump. Computational fluid dynamic (CFD) simulations are carried out to determine the performance of the pump and analyses the pumping system to achieve the pumping capacity. Results show that enhanced pumping capacity is achieved at a given impeller design with a specific shift in the pump curve. It is recommended that the pumping capacity can be optimized through trimming of impeller. Trimming of the impeller improves pump efficiency and increases the performance of the pump. In addition, the pumping capacity can also be optimized through the system analysis by adjusting the diameter of the pipes and throttling of the valves. Optimization of the pumping capacity helps with running the pumping system efficiently.

Water Supply Pumping Station Energy Consumption Analysis and Energy Saving Research Based on the Energy Consumption Coefficient

2013 ◽  
Vol 724-725 ◽  
pp. 999-1004
Author(s):  
Jing Ying Fang ◽  
Zhi Peng Li ◽  
Fang Fang Chen ◽  
Yan Hui Chen
Keyword(s):  
Energy Consumption ◽  
Water Supply ◽  
Energy Saving ◽  
Average Energy ◽  
Energy Utilization ◽  
Utilization Rate ◽  
Pump Efficiency ◽  
Pumping System ◽  
Consumption Coefficient ◽  
Average Energy Consumption

From the view point of efficiency, the energy consumption coefficient was used as the energy utilization evaluation index in a water supply pumping system, and through the comparative analysis between the energy consumption coefficient and the pump efficiency, the past pump efficiency that was used as the economic index in the system could not completely and scientifically reflect the energy utilization rate of the system, while the energy consumption coefficient could intuitively reflect conveying unit volume of liquid consumption in a water supply pumping system. Based on the theory of energy consumption coefficient, the comprehensive analysis of different energy saving methods, energy saving space estimation, and average energy consumption coefficient calculation under variable conditions of the system in a water supply pumping system can give a specific guidance scheme of energy saving to the system, and it has a guidance and reference significance to the energy saving reform in the water supply pumping system.

Green Technology for Eco-friendly and Sustainable Shipping using Adjustable Speed Drive

2015 ◽  
Author(s):  
Sanjay Dabadgaonkar ◽  
Asim Kumar Sen ◽  
Rajendra Prasad
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Greenhouse Gas Emission ◽  
Sea Water ◽  
Management Plan ◽  
Green Technology ◽  
Water Cooling ◽  
Centrifugal Pumps ◽  
Adjustable Speed ◽  
Intelligent Technology

The revised MARPOL Convention addresses emissions from ships under Annex VI, chapter 4, entered into force since 1st January 2013. It set mandatory measures to reduce emissions of greenhouse gases (GHGs) from international shipping, with the Energy Efficiency Design Index (EEDI) made mandatory for new ships, and the Ship Energy Efficiency Management Plan (SEEMP) made a requirement for all ships. The major consumption of energy and burning of fuel onboard is generally required for Ballast water management, Sea water cooling, Cargo operation and Propulsion. Energy efficiency plays the most important role in reduction of energy consumption, fuel consumption and CO2 emissions, accounting for up to 53% of total CO2 emission reductions onboard ship. In pumping applications onboard vessels for sea water cooling systems, the use of proposed Variable Frequency Drives (VFD) control can cut the energy consumption by as much as 60%. Here we have developed a model of adjustable speed drives for controlling high power centrifugal pumps onboard ship for energy conservation and eco-friendly sailing. The results of simulation shows that the proposed method of flow control using VFD not only saves energy but also reduces burning of fuel and also results in a reduction of greenhouse gas emission. Therefore by the use of proposed Green, Smart and Intelligent technology, we can save significant energy and reduce emission of GHG, so as to meet stringent norms as per MARPOL ANNEX-VI, Chapter-4.

The Least Energy Demand Method as Metric to Evaluate Different Production Levels Based on the Relative Energy Efficiency

2015 ◽  
Vol 805 ◽  
pp. 3-10 ◽  
Author(s):  
Sven Kreitlein ◽  
Isabel Kupfer ◽  
Markus Brandmeier ◽  
Jörg Franke
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Demand ◽  
Minimum Energy ◽  
Relative Energy ◽  
Influential Factors ◽  
Independent Basis ◽  
Production Area ◽  
Calculation System ◽  
Definition Of

This paper presents a calculation system for evaluating the energy efficiency at machine, plant, location, company, and sector level based on the process specific minimum energy demand. The goal is a comparability of the energy efficiency across machines, plants, locations, companies, and sectors through definition of significant key figures. The basis of the derivation of possible saving potentials is the relative energy efficiency (REE). [7] It is determined by the quotient of minimal energy demand and actually measured consumption and requires that the actually measured energy consumption refers to an independent basis of comparison. The step-by-step development of the calculation system, structured in levels, is based on the detailed analysis of all the influential factors of the energy consumption with the help of cause and effect diagrams to calculate the minimally necessary energy demands for the manufacturing process. Furthermore, the described bottom-up approach delivers, ensuing from the process oriented level of perspective, the step-by-step conception of the calculation method. The REE of a level of perspective is calculated on the basis of the REE value of the previous production level as well as according weighting factors. On the basis of the calculation, as well as subsequent measurements within the company, optimization potentials [10] can be clearly described and can lead back to their roots. These optimization potentials are based on exemplary trials presented for a chosen manufacturing chain of the electronics production area.

Impact of Laser-Based Technologies in the Energy-Consumption of Metal Cutters: Comparison between Commercially Available Systems

2011 ◽  
Vol 473 ◽  
pp. 809-815 ◽  
Author(s):  
Marta Oliveira ◽  
João P. Santos ◽  
Fernando G. Almeida ◽  
Ana Reis ◽  
João P. Pereira ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Electricity Consumption ◽  
Electrical Energy ◽  
Work Conditions ◽  
Design Guidelines ◽  
Machining Processes ◽  
Alternative Technologies ◽  
Similar Work ◽  
Definition Of ◽  
Process Energy

This paper introduces a framework for the Ecodesign of sheet metal cutters, which targets the definition of a set of design guidelines for this type of machine-tools, based on the contribution of the main equipment sub-systems to the processing and environmental impacts associated to their electrical energy consumption. A comparative study of commercially available Laser cutting equipments, using CO2 or doped fiber as the energy source, is described. Two parallel analysis of electricity consumption have been carried out: (1) the observation of CO2-Laser cutters usage, production modes and work conditions in real industrial environments, and (2) a comparison between these and a Fiber-Laser equipment, for a similar work order (material and thickness). The specific process energy with the different equipments was calculated, and confirms the importance of alternative technologies and practices for the energy efficiency of machining processes.

Definition of nZEB Renovation Standard

2018 ◽  
pp. 1-23
Author(s):  
Szymon Firląg
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Demand ◽  
Primary Energy ◽  
Low Energy ◽  
General Definition ◽  
Primary Energy Demand ◽  
Zero Energy Building ◽  
Definition Of ◽  
Country Specific

The aim of the chapter is to present existing definitions of building renovation to nearly zero energy building (nZEB). The EU buildings stock has low energy efficiency and is responsible for the biggest energy consumption. This chapter describes first of all the legal background in EU and general definition of nZEB renovation. In the next part, country-specific definitions are cited. Most of them are setting requirements for primary energy demand. The example of Poland is used to show the possible process of defining the nZEB renovation standard.

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