Developing a Technology of In-Service Energy Efficiency Improvement of Commercial-Grade Hermetic-Compressor-Equipped Items Utilized in the Sphere of Service

Cooling loop devices account for the biggest part of energy consumption in the sphere of consumer goods and services. The results of an analysis of the current status of the refrigerating device pool reveal its deficiency in terms of modern requirements. The article presents the results of research into the impact of the working pattern and voltage of the electric network on the output performance of compressors. The researchers develop and substantiate a technology of in-service energy efficiency improvement of commercial-grade hermetic-compressor-equipped items.

Download Full-text

Energy Efficiency Improvement Solutions for Supermarkets by Low-E Glass Door and Digital Semi-Hermetic Compressor

Energies ◽

10.3390/en14113134 ◽

2021 ◽

Vol 14 (11) ◽

pp. 3134

Author(s):

Piyanut Saengsikhiao ◽

Juntakan Taweekun

Keyword(s):

Energy Efficiency ◽

Energy Saving ◽

Energy Use ◽

Payback Period ◽

Saving Rate ◽

Efficiency Improvement ◽

Energy Efficiency Improvement ◽

Glass Door ◽

The Impact ◽

Hermetic Compressor

This research presents an energy efficiency improvement solution for supermarkets with the use of low-E glass doors for open refrigerators and a digital semi-hermetic compressor to fix the speed of semi-hermetic compressors. The impact of a door’s installation causes its load to be reduced by 40%, and the compressor shuts down frequently, which decreases its lifetime. In order to ensure that energy-saving solutions do not affect maintenance costs, the installation of a digital semi-hermetic compressor is proposed to lower costs and save energy. Our economic results from tests carried out at a 3000 square meter supermarket, which was open from 6:00 am to 12:00 am and in which we installed 82 doors on 15 open refrigerators, showed a 1.1-year payback period with an energy saving rate of 192,220 kWh/year for store No.1 (R22) and in which we installed 80 doors on 15 open refrigerators, showed a 1.4-year payback period with an energy saving rate of 171,185 kWh/year for store No.2 (R404A). The energy-saving effects of the digital semi-hermetic compressor, which fixes the speed of the semi-compressor and solves the problem of impact from fridge door installation, showed a 2.9-year payback period with an energy saving rate of 26,890 kWh/year for store No.1 (R22) and showed a 2.9-year payback period with an energy saving rate of 26,571 kWh/year for store No.2 (R404A). The results of store No.1 (R22) and store No.2 (R404A) showed no differences. This research is an extension of an energy-saving project that can be carried out on a continuous basis, increasing the efficiency of energy use and being a sustainable source of energy conservation.

Download Full-text

The Identification and Rebound Effect Evaluation of Equipment Energy Efficiency Improvement Policy: A Case Study on Japan’s Top Runner Policy

Energies ◽

10.3390/en13174397 ◽

2020 ◽

Vol 13 (17) ◽

pp. 4397

Author(s):

Dan Yu ◽

Bart Dewancker ◽

Fanyue Qian

Keyword(s):

Energy Efficiency ◽

Life Cycle ◽

Energy Conservation ◽

Emission Reduction ◽

Rebound Effect ◽

Good Effect ◽

Efficiency Improvement ◽

Energy Efficiency Improvement ◽

Reduction Effect ◽

The Impact

The equipment energy efficiency improvement policy (EEEIP) is one of the important measures of energy conservation and emission reduction in various countries. However, due to the simultaneous implementation of variety policies, the effect of the single policy cannot be clearly reflected. In this paper, a method of identification and evaluation of EEEIP was proposed, and the application was verified by analyzing the example of EEEIP in Japan (Top Runner policy, TRP). Firstly, through the factor decomposition model, this paper studied the energy conservation and emission reduction potential of this policy area in Japan. Then, the TRP was identified by using moving windows and correlation analysis, and the impact of specific equipment in TRP was analyzed. Finally, through the calculation of the rebound effect of the carbon footprint (REC), this paper analyzed the energy consumption and emission reduction effects of TRP in the short-term and whole life cycle. It showed that the policy has a good effect in tertiary industry and transportation, while the effect in residential is poor. For life cycle, the TRP of air conditioning and passenger car can bring better CO2 emission reduction effect, but the emission reduction effect of lighting is basically offset.

Download Full-text

The Impact of an Energy Efficiency Improvement Policy on the Economic Performance of Electricity-Intensive Firms in Ghana

Energies ◽

10.3390/en12193684 ◽

2019 ◽

Vol 12 (19) ◽

pp. 3684 ◽

Cited By ~ 2

Author(s):

Chui Ying Lee ◽

Samuel Lotsu ◽

Moinul Islam ◽

Yuichiro Yoshida ◽

Shinji Kaneko

Keyword(s):

Energy Efficiency ◽

Power Factor ◽

Regression Discontinuity Design ◽

Efficiency Improvement ◽

Medium Voltage ◽

Energy Efficiency Improvement ◽

Adverse Impacts ◽

Long Run ◽

Power Factor Improvement ◽

The Impact

This paper investigates the economic impact of an energy efficiency improvement policy on electricity-intensive firms in Ghana. The policy imposed a penalty on these electricity-intensive firms, which are referred to as special load tariff (SLT) customers, when their power factor was below 90%. This paper applies the regression discontinuity design (RDD) to the panel data of these SLTs ranging from 1994 to 2012, excluding those years characterized by energy crisis. The results show adverse impacts of the policy on the employment and salary levels of the firms in the long run, in particular, the small- and medium–voltage firms. The results indicate that small- and medium–voltage firms are economically vulnerable to the penalty policy in the long run and recommend two policies to overcome this challenge. Firstly, the penalty for power factor improvement should not be imposed identically across firms with different voltage levels. Secondly, firms that satisfy the power factor standard should receive subsidies to improve their competitiveness in the market.

Download Full-text

Strategy Context of Decision Making for Improved Energy Efficiency in Industrial Energy Systems

Energies ◽

10.3390/en13071540 ◽

2020 ◽

Vol 13 (7) ◽

pp. 1540 ◽

Cited By ~ 1

Author(s):

Alexander Melnik ◽

Kirill Ermolaev

Keyword(s):

Decision Making ◽

Energy Efficiency ◽

Energy Saving ◽

Energy Management ◽

Strategic Decision ◽

Efficiency Improvement ◽

Conceptual Approach ◽

Industrial Companies ◽

Energy Efficiency Improvement ◽

The Impact

Energy efficiency improvement in industrial companies is an essential prerequisite for the enhancement of their competitive positions in the national and global markets. Yet, the approaches currently employed in respect of the energy management do not fully utilize the innovative potential of energy technologies to achieve strategic goals. One way to further develop energy management is theoretical justification of the use of new approaches based on the suggested concept of the energy saving and energy efficiency processes’ positioning in the system of a company’s management priorities. In this article, we consider the applied use of the developed conceptual approach from the perspective of the energy saving and energy efficiency program development at the company. The main purpose of this paper is to justify the relations between energy management and strategic decision making in industrial companies. The results of the research conducted, firstly, make a certain contribution into the research of strategic multiple benefits of energy efficiency in a company; secondly, they expand understanding of the impact of energy saving and energy efficiency improvement on the achievement of operational, tactical and strategic results of the company’s activities; thirdly, they provide methodological decision support for the development of energy saving and energy efficiency programs taking into account the management and organizational barriers.

Download Full-text