Ejector Energy-Saving Technology for Mobile Air Conditioning Systems

2017 ◽  
Vol 10 (1) ◽  
pp. 102-110 ◽  
Author(s):  
Yoichiro Kawamoto ◽  
Gota Ogata ◽  
Zhiwei Shan
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Energy Saving Technology ◽  
Air Conditioning Systems

scholarly journals Systematic Method for the Energy-Saving Potential Calculation of Air-Conditioning Systems via Data Mining. Part I: Methodology

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 81
Author(s):  
Rongjiang Ma ◽  
Shen Yang ◽  
Xianlin Wang ◽  
Xi-Cheng Wang ◽  
Ming Shan ◽  
...  
Keyword(s):  
Data Mining ◽  
Energy Consumption ◽  
Energy Saving ◽  
Air Conditioning ◽  
Storage System ◽  
Operation Mode ◽  
Systematic Method ◽  
Potential Analysis ◽  
Energy Saving Potential ◽  
Air Conditioning Systems

Air-conditioning systems contribute the most to energy consumption among building equipment. Hence, energy saving for air-conditioning systems would be the essence of reducing building energy consumption. The conventional energy-saving diagnosis method through observation, test, and identification (OTI) has several drawbacks such as time consumption and narrow focus. To overcome these problems, this study proposed a systematic method for energy-saving diagnosis in air-conditioning systems based on data mining. The method mainly includes seven steps: (1) data collection, (2) data preprocessing, (3) recognition of variable-speed equipment, (4) recognition of system operation mode, (5) regression analysis of energy consumption data, (6) constraints analysis of system running, and (7) energy-saving potential analysis. A case study with a complicated air-conditioning system coupled with an ice storage system demonstrated the effectiveness of the proposed method. Compared with the traditional OTI method, the data-mining-based method can provide a more comprehensive analysis of energy-saving potential with less time cost, although it strongly relies on data quality in all steps and lacks flexibility for diagnosing specific equipment for energy-saving potential analysis. The results can deepen the understanding of the operating data characteristics of air-conditioning systems.

STANDARD ASSESSMENT FOR ENERGY SAVING STRATEGIES OF INDUSTRIAL AIR-CONDITIONING SYSTEMS

2021 ◽  
Author(s):  
Jéssica Duarte ◽  
Lara Werncke Vieira ◽  
Rafael Zanardo ◽  
Augusto Delavald Marques ◽  
Paulo Smith Schneider
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Standard Assessment ◽  
Air Conditioning Systems

scholarly journals Analysis of Energy Consumption in Different European Cities: The Adaptive Comfort Control Implemented Model (ACCIM) Considering Representative Concentration Pathways (RCP) Scenarios

2020 ◽  
Vol 10 (4) ◽  
pp. 1513 ◽  
Author(s):  
Daniel Sánchez-García ◽  
David Bienvenido-Huertas ◽  
Jesús A. Pulido-Arcas ◽  
Carlos Rubio-Bellido
Keyword(s):  
Climate Change ◽  
Thermal Comfort ◽  
Energy Saving ◽  
Greenhouse Gas ◽  
Air Conditioning ◽  
Rcp Scenarios ◽  
Assessment Report ◽  
European Cities ◽  
Adaptive Thermal Comfort ◽  
Air Conditioning Systems

Reports of Intergovernmental Panel on Climate Change have set various greenhouse gas emissions scenarios, through which the evolution of the temperature of the planet can be estimated throughout the 21st century. The reduction of the emissions from the different activities carried out by mankind is crucial to mitigate greenhouse gas emissions. One of the most significant activities is users’ behaviour within buildings, particularly the use of Heating, Ventilation and Air-Conditioning systems. Modifying users’ behaviour patterns to guarantee acceptable thermal conditions inside buildings could lead to considerable energy saving percentages, and adaptive thermal comfort models could be an opportunity to achieve important savings. For this reason, this study analyzes the potential to apply adaptive thermal comfort models to use artificial air-conditioning systems by modifying setpoint temperatures. The analysis was conducted in five major European cities (Barcelona, Berlin, Bern, Rome, and Vienna) and in five climate change scenarios in the year 2050. The results showed that, in general, the energy saving achieved by adaptive strategies was larger in the cities with a greater cooling demand. Also, in both Representative Concentration Pathways (RCP) of the Fifth Assessment Report (AR5) considered, the energy saving were decreased in the cities of Barcelona and Rome, with values lower than those of the Fourth Assessment Report (AR4) scenarios considered, whereas in the cities of Berlin, Bern, and Vienna, the saving in the RCP scenarios is greater than those in the other scenarios.

Data Center Room Air Conditioning Energy Consumption Analysis

2014 ◽  
Vol 672-674 ◽  
pp. 518-521
Author(s):  
Li Fei Song ◽  
Tao Li ◽  
Qi Fen Li ◽  
Lin Hui Zhao ◽  
Xin Zhao ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Energy Saving ◽  
Data Center ◽  
Air Conditioning ◽  
Field Research ◽  
Northern China ◽  
Air Conditioning System ◽  
Energy Consumption Analysis ◽  
Energy Saving Technology

In this paper, the Unicom's medium-sized IDC room in a city of northern China is the research object for the study. Based on field research of the room refrigeration conditions, data center room air conditioning system is carried out to optimize and for energy conservation research. Through the analytic methods of energy saving-technology, the best energy saving solutions is explored.

Experimental Study on Determining Thermal Conductivity of Soil

2012 ◽  
Vol 170-173 ◽  
pp. 516-519
Author(s):  
Dai Yong Jia ◽  
Lu Yan Sui ◽  
Liang Kai Fan ◽  
Jin Sheng Wang
Keyword(s):  
Thermal Conductivity ◽  
Energy Saving ◽  
Air Conditioning ◽  
Critical Parameter ◽  
Operating Performance ◽  
Ground Source Heat Pump ◽  
Soil Thermal Conductivity ◽  
Ground Source ◽  
Energy Saving Technology ◽  
Water Contents

Ground source heat pump (GSHP) is an effective energy saving technology for heating and air conditioning. Thermal conductivity of soil is a critical parameter for designing a GSHP system, as the parameter is indispensable in analyzing and determining initial investment, energy saving effects, and operating performance of the system. In this study, the major influencing factors of soil thermal conductivity were analyzed. With different compositions and water contents of soil, the values of conductivity were determined experimentally, which can provide essential data for designing a GSHP system. This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text

scholarly journals Utilizing the solar thermal ice storage system in improving the energy, exergy, economic and environmental assessment of conventional air conditioning system

2021 ◽  
Author(s):  
Mohamed Elhelw ◽  
Wael M. El-Maghlany ◽  
Mohamed Shawky Ismail ‎
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Storage System ◽  
Water System ◽  
Maximum Energy ◽  
Ice Storage ◽  
Air Conditioning System ◽  
Air System ◽  
Alexandria City ◽  
Air Conditioning Systems

Abstract This paper introduces novel modification for conventional air conditioning systems through utilizing a thermal ice storage system integrated with solar panels. Alexandria and Aswan, cities in Egypt, are chosen to represent two climates for hot-humid and hot-dry climates respectively. The governing equations for both heat and mass transfer are theoretically solved. Exergy analysis is performed for the proposed solar-ice thermal storage system via determining exergy destruction on ice and solar components as well as the total destruction based on transient analysis. This study was carried out on two common types of air conditioning systems, an air handling unit and fan coil unit. Results showed that, solar-ice storage system is more effective approach in hot-humid climate than hot-dry climate and more efficient with all-water air conditioning system than with all-air conditioning system. The maximum energy saving is 205.16 GJ having a percent of 27.5% in August for all water system in case of Alexandria city and 224.67 GJ with a percent of 25.38% in August for all-water system in case of Aswan city. All air system simulation showed maximum energy saving of 175.05 GJ with a percent of 18.13 % in case of August for Alexandria and 175.45 GJ having a percentage of 17.43% in case of Aswan in August. Moreover, the all-water system achieved a reduction in CO2 emissions by 467 tons/year in Aswan city and 390 tons/year in case of Alexandria city. While these reductions decrease to be 435 and 353 tons/year when the all-air system used for the same two cities.

scholarly journals Discussion on Energy Saving Technology of Building Heating Ventilation Air Conditioning

2020 ◽  
Vol 4 (2) ◽  
Author(s):  
Xiaoli Mu
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Emission Reduction ◽  
Air Conditioning ◽  
Building Energy ◽  
Modern Architecture ◽  
Building Energy Consumption ◽  
Continuous Development ◽  
Energy Saving Technology ◽  
Consumption System

Heating Ventilation Air Conditioning (HVAC) is an important part of modern architecture, and it is also the most important energy consumption system in the use of modern buildings. With the continuous development and progress of the society, energy saving and emission reduction has become a hot topic in today's society, and people pay enough attention to the application of building HVAC energy-saving technology. Through the application of this technology, the effect of reducing building energy consumption is achieved. The author explores and analyzes the necessity and main advantages of building HVAC energy-saving technology, and puts forward an effective way to apply HVAC energy-saving technology, which is hoped to help reduce building energy consumption.

The Energy Consumption Investigation of the Hotel Central Air-Conditioning System and the Research of Energy Saving Measures

2013 ◽  
Vol 712-715 ◽  
pp. 1614-1618
Author(s):  
Jia Jia Ni ◽  
Li Tao ◽  
Yi Jun Wang ◽  
Jin Lei Wu
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Air Conditioning ◽  
Waste Heat ◽  
Frequency Control ◽  
Building Envelope ◽  
Air Conditioning System ◽  
Central Air Conditioning ◽  
Energy Saving Technology ◽  
System Energy

Through to investigation on present situation of the Changzhou Changrui Hotel air conditioning system energy consumption, by analysis the energy consumption, the power consumption of hotel central air-conditioning system charge 58% of the total electric, accounted for a large proportion. So we should take the necessary measures to reduce the expenses of air conditioning system energy consumption. According to the analysis of data on the survey, we put forward some particular energy-saving measures of central air-conditioning system of the hotel, including strengthening the building envelope insulation, energy saving technology of doors and windows, measures of roof energy saving, setting reasonable indoor temperature, adopting frequency control air-conditioning, reuse waste heat of the central air-conditioning, using the condensation water of central air conditioning to make-up water and reducing temperature of cooling tower , and drying the fresh air independently.

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