ELECTRICAL POWER GENERATED FROM AN OPERATING DESKTOP COMPUTER THROUGH WASTE HEAT RECOVERY

10.6036/10150 ◽  
2021 ◽  
Vol 96 (4) ◽  
pp. 345-345
Author(s):  
CARLOS ALBERTO GARCIA RODRIGUEZ ◽  
PEDRO QUINTO DIEZ ◽  
JOSE ALFREDO JIMENEZ BERNAL ◽  
IGNACIO CARVAJAL MARISCAL
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Heat Recovery ◽  
Waste Heat ◽  
Electrical Power ◽  
Industrial Sector ◽  
Total Energy Consumption ◽  
Desktop Computer ◽  
Increase Energy Efficiency ◽  
Different Types

Use of heat recovery systems applied to different industries as a technology to increase energy efficiency [1] is becoming more and more common, one third of the total energy consumption is related to the industrial sector, and of this, about fifty percent is wasted as heat [2]. Increasing use of different types of computers forces us to rethink the possibility of improving their energy efficiency and consequently reducing their energy consumption.

scholarly journals Efficiency of Wireless Sensor Network with MIMO Techniques

2019 ◽  
Vol 9 (2) ◽  
pp. 4896-4898
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Wireless Sensor Network ◽  
Sensor Network ◽  
Performance Metrics ◽  
Wireless Sensor ◽  
Total Energy Consumption ◽  
Different Types ◽  
Energy Consumptions ◽  
And Performance

A performance analysis of the energy efficiency of Wireless Sensor Network with different types of MIMO techniques is carried out in this paper. MIMO concept is integrated with WSN and performance of such network is analyzed and experimented in this paper with respect to different energy consumptions viz., transmit energy consumption and total energy consumption. It is concluded that WSN with BPSKMIMO outperforms WSN with SISO. The results published in this paper show that the integration WSN with BPSK-MIMO can achieve better performance metrics

Continuous Improvements Analysis in Energy Efficiency of Steering Power Systems to Light Vehicles

2015 ◽  
Vol 798 ◽  
pp. 92-96
Author(s):  
José Antônio Silva ◽  
Gláucio C. Laun Nacif ◽  
Luben Cabezas-Goméz
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Power System ◽  
Electrical Power ◽  
Steering System ◽  
Bench Test ◽  
Electrical Power System ◽  
Total Energy Consumption ◽  
Hydraulic Power ◽  
The Impact

This study analyses the energy consumption of a vehicle steering system and evaluates potential earnings in using more efficient systems. The energy consumption of the steering system to provide assistance can be until 3% of the vehicle total energy consumption. The technology evolution of the steering system provides a significant reduction in energy consumption. Three types of steering systems were evaluated: Hydraulic Power System, Electro-Hydraulic Power System and Electrical Power System, respectively, considering the consumption and the energy efficiency of their components. Some evaluations of the energy consumed by system components were performed using data from the available sources in the literature and other evaluations were performed via experimental tests on a bench test. A comparative study was set to determine the differences between steering systems regarding the energy consumption and energy efficiency. Consumption analysis of steering system were extended to evaluate the impact in the final vehicle consumption. The Electrical Power System can increase the efficiency in fuel use during operation in the vehicle.

Study on Adsorption Desiccant Based Hybrid Air Conditioning System

2012 ◽  
Vol 516-517 ◽  
pp. 1196-1200 ◽  
Author(s):  
Zhao Hong He ◽  
Hong Yu Huang ◽  
Zhi Xian Lin ◽  
Hao Ran Yuan ◽  
Noriyuki Kobayashi ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Heat Recovery ◽  
Waste Heat ◽  
System Structure ◽  
Refrigeration System ◽  
Total Energy Consumption ◽  
Air Conditioning System ◽  
New Type ◽  
Compression Type

The desiccant based hybrid air conditioning system can control temperature and humidity separately, which consists of adsorption desiccant system and compression type refrigeration system. The adsorption desiccant system obtains the moisture power, and the compression type refrigeration can obtain sensible heat load. Generally, the regenerated energy consumption of the desiccant wheel is very large in the total energy consumption, using electric power, waste heat or renewable energy (solar etc). Heat recovery from the condenser considered as only regenerated energy in the new type adsorption desiccant based hybrid air conditioning system is proposed and discussed in this paper. This method can reduce much energy consumption, and make the air conditioning system structure simple.

scholarly journals Design of a Database of Case Studies and Technologies to Increase the Diffusion of Low-Temperature Waste Heat Recovery in the Industrial Sector

2021 ◽  
Vol 13 (9) ◽  
pp. 5223
Author(s):  
Miriam Benedetti ◽  
Daniele Dadi ◽  
Lorena Giordano ◽  
Vito Introna ◽  
Pasquale Eduardo Lapenna ◽  
...  
Keyword(s):  
Low Temperature ◽  
Case Studies ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Industrial Sector ◽  
Implementation Rate ◽  
Depth Analysis ◽  
Technology Market

The recovery of waste heat is a fundamental means of achieving the ambitious medium- and long-term targets set by European and international directives. Despite the large availability of waste heat, especially at low temperatures (<250 °C), the implementation rate of heat recovery interventions is still low, mainly due to non-technical barriers. To overcome this limitation, this work aims to develop two distinct databases containing waste heat recovery case studies and technologies as a novel tool to enhance knowledge transfer in the industrial sector. Through an in-depth analysis of the scientific literature, the two databases’ structures were developed, defining fields and information to collect, and then a preliminary population was performed. Both databases were validated by interacting with companies which operate in the heat recovery technology market and which are possible users of the tools. Those proposed are the first example in the literature of databases completely focused on low-temperature waste heat recovery in the industrial sector and able to provide detailed information on heat exchange and the technologies used. The tools proposed are two key elements in supporting companies in all the phases of a heat recovery intervention: from identifying waste heat to choosing the best technology to be adopted.

Energy Consumption Analysis of Ship Energy System

2014 ◽  
Vol 962-965 ◽  
pp. 1836-1839
Author(s):  
Yong Ren ◽  
Zhen Ying Mu ◽  
Hong Tao Zheng ◽  
Shi Chen
Keyword(s):  
Energy Consumption ◽  
Recovery Rate ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Energy System ◽  
Loss Ratio ◽  
Energy Consumption Analysis ◽  
Performance Indexes ◽  
Analysis Models

Energy consumption analysis models of ship energy system were established. The performance indexes, such as energy loss ratio, waste heat recovery rate and waste heat recovery perfect degree were defined. A 70000 - ton crude oil carrier was taken as an example for energy consumption analysis. The results show that the waste heat recovery rate of exhaust smoke was 15.69%, and the waste heat recovery perfect degree was 52.76%.

scholarly journals Energy and Exergy Analyses of Tube Banks in Waste Heat Recovery Applications

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2094 ◽  
Author(s):  
Mustafa Erguvan ◽  
David MacPhee
Keyword(s):  
Energy Efficiency ◽  
Reynolds Number ◽  
Heat Recovery ◽  
Waste Heat ◽  
Cross Flow ◽  
Exergy Efficiency ◽  
Circular Cylinders ◽  
Published Data ◽  
Energy And Exergy ◽  
Exergy Analyses

In this study, energy and exergy analyses have been investigated numerically for unsteady cross-flow over heated circular cylinders. Numerous simulations were conducted varying the number of inline tubes, inlet velocity, dimensionless pitch ratios and Reynolds number. Heat leakage into the domain is modeled as a source term. Numerical results compare favorably to published data in terms of Nusselt number and pressure drop. It was found that the energy efficiency varies between 72% and 98% for all cases, and viscous dissipation has a very low effect on the energy efficiency for low Reynolds number cases. The exergy efficiency ranges from 40–64%, and the entropy generation due to heat transfer was found to have a significant effect on exergy efficiency. The results suggest that exergy efficiency can be maximized by choosing specific pitch ratios for various Reynolds numbers. The results could be useful in designing more efficient heat recovery systems, especially for low temperature applications.

Energy Consumption Prediction of University Buildings in China and Strategies for Energy Efficiency Management

2015 ◽  
Author(s):  
Li-juan Qu ◽  
Li-nan Lei ◽  
Wei Chen ◽  
Jin-yuan Qian
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Total Energy ◽  
Ministry Of Education ◽  
Total Energy Consumption ◽  
Use Of Resources ◽  
Starting Point ◽  
Conservation Actions ◽  
Urban Rural ◽  
University Buildings

In 2007, Chinese Ministry of Education (MOE) and Ministry of Housing & Urban-Rural Development (MOHURD) carried out the Campus Resource Conservation Actions, in order to take full use of resources and to improve the energy efficiency. However, due to the large amounts of universities, the total energy consumption and the energy efficiency situation have no objective statistics. Taking modeling the energy consumption of university buildings as the starting point, this paper analyzes the characteristics of university buildings in China. Then, we do the prediction, trend and potential analysis of the total energy consumption in 2020. In addition, four strategies for energy efficiency management are carried out, which might be helpful for all the university managers and related departments.

scholarly journals Yearly Heat Loss Analysis of a Heat Recovery Ventilator Unit for a Single-Family House in St. John’s, NL, Canada

2019 ◽  
Vol 3 (5) ◽  
Author(s):  
Rabbani Rasha ◽  
M. Tariq Iqbal
Keyword(s):  
Energy Consumption ◽  
Heat Loss ◽  
Heat Recovery ◽  
Ventilation System ◽  
Single Family ◽  
Loss Analysis ◽  
Increase Energy Efficiency ◽  
Electricity Cost ◽  
Air Infiltration ◽  
Detached House

This paper represents an energy consumption and heat loss analysis of a heat recovery ventilator unit in a single-family detached house in St. John’s, NL, Canada. An energy-efficient house is a growing attraction to control the air infiltration, provide a comfortable environment with reduced yearly electricity cost. A mechanical induced ventilation system is inevitable to increase energy efficiency and to reduce greenhouse gas emissions of the house in order to supply fresh air. A heat recovery ventilator (HRV) is an air to air heat exchangers that recovers heat from inside of the house and delivers this preheated and fresh air to the space for maintaining the occupant’s comfort. In this paper, yearly energy consumption with the heat loss of a typical heat recovery ventilator unit is presented. MATLAB, BE opt, and Microsoft Excel are used to do all necessary simulation with calculation using one-year logged data. Methodology, results with graphs and detailed analysis of this research are included in this paper. This research indicates that the cost of running a HRV for a year in a house in St. John’s could be as high as $484 per year with an unknown air quality improvement.

Analysis of China’s Provincial Energy Efficiency Based on the Generalized DEA Method

2014 ◽  
Vol 953-954 ◽  
pp. 890-895
Author(s):  
Hui Min Li ◽  
Cun Bin Li ◽  
Zhan Xin Ma
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Total Energy Consumption ◽  
Rapid Economic Growth ◽  
Technology Changes ◽  
Dea Method ◽  
Save Energy ◽  
The Impact

In recent years, with the rapid economic growth, the demand on the amount of energy in China is increasing. So the problem of how to improve the energy utilization efficiency and save energy consumption has to be tackled. The traditional CCR model and BCC model used in the study of provincial energy efficiency do not take the impact of technological progress into consideration. Therefore, the paper uses the generalized DEA method to research the energy utilization efficiency of China’s 29 provinces, that is, to evaluate and analyze the energy utilization efficiency by selecting the capital stock, employment and total energy consumption of China’s provinces as input factors and GDP, per capital GDP as output factors, and then draw tables showing each province’s change of average annual overall efficiency and the pure technology changes, and finally analyze the regularities underlying these changes.

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