Reduced energy consumption by massive thermoelectric waste heat recovery in light duty trucks

2012 ◽  
Author(s):  
D. Magnetto ◽  
G. Vidiella
Keyword(s):  
Energy Consumption ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Light Duty

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%.

On the effects of increased coolant temperatures of light duty engines on waste heat recovery

2020 ◽  
Vol 172 ◽  
pp. 115157 ◽  
Author(s):  
Vikram Singh ◽  
Jelmer Johannes Rijpkema ◽  
Karin Munch ◽  
Sven B. Andersson ◽  
Sebastian Verhelst
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Light Duty

A New Energy Frugal Paradigm for Data Centers

2010 ◽  
Author(s):  
Adrienne B. Little ◽  
Srinivas Garimella
Keyword(s):  
Energy Consumption ◽  
Data Center ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Data Centers ◽  
Waste Heat ◽  
Residential Buildings ◽  
Integrated Approach ◽  
The United States ◽  
Primary Energy

Of the total electricity consumption by the United States in 2006, more than 1% was used on data centers alone; a value that continues to rise rapidly. Of the total amount of electricity a data center consumes, at least 30% is used to cool server equipment. The present study conceptualizes and analyzes a novel paradigm consisting of integrated power, cooling, and waste heat recovery and upgrade systems that considerably lowers the energy footprint of data centers. Thus, on-site power generation equipment is used to supply primary electricity needs of the data center. The microturbine-derived waste heat is recovered to run an absorption chiller that supplies the entire cooling load of the data center, essentially providing the requisite cooling without any additional expenditure of primary energy. Furthermore, the waste heat rejected by the data center itself is boosted to a higher temperature with a heat transformer, with the upgraded thermal stream serving as an additional output of the data center with no additional electrical power input. Such upgraded heat can be used for district heating applications in neighboring residential buildings, or as process heat for commercial end uses such as laundries, hospitals and restaurants. With such a system, the primary energy usage of the data center as a whole can be reduced by about 23 percent while still addressing the high-flux cooling loads, in addition to providing a new income stream through the sales of upgraded thermal energy. Given the large and fast-escalating energy consumption patterns of data centers, this novel, integrated approach to electricity and cooling supply, and waste heat recovery and upgrade will substantially reduce primary energy consumption for this important end use worldwide.

Investigating Potential Efficiency Improvement for Light-Duty Transportation Applications Through Simulation of an Organic Rankine Cycle for Waste-Heat Recovery

2010 ◽  
Author(s):  
K. Dean Edwards ◽  
Robert M. Wagner
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Efficiency Improvement ◽  
Light Duty ◽  
Driving Conditions ◽  
Egr Cooler ◽  
Transportation Applications

Modern diesel engines used in light-duty transportation applications have peak brake thermal efficiencies in the range of 40–42% for high-load operation with substantially lower efficiencies at realistic road-load conditions. Thermodynamic energy and exergy analysis reveals that the largest losses from these engines are due to heat loss and combustion irreversibility. Substantial improvement in overall engine efficiency requires reducing or recovering these losses. Unfortunately, much of the heat transfer either occurs at relatively low temperatures resulting in large entropy generation (such as in the air-charge cooler), is transferred to low-exergy flow streams (such as the oil and engine coolant), or is radiated or convected directly to the environment. While there are significant opportunities for recovery from the exhaust and EGR cooler for heavy-duty applications, the potential benefits of such a strategy for light-duty diesel applications are unknown due to transient operation, the low thermal quality of exhaust gases at typical driving conditions, and the added mass of the system. Waste-heat recovery efforts will directly compete with NOx aftertreatment systems for the limited thermal energy in the exhaust during low-load operation. We have developed an organic Rankine cycle model using GT-Suite® to investigate the potential for efficiency improvement through waste-heat recovery from the exhaust and EGR cooler of a light-duty diesel engine. Results from steady-state and drive-cycle simulations are presented, and we discuss the operational difficulties associated with transient drive cycles and competition between waste-heat recovery systems, turbochargers, aftertreatment devices, and other systems for the limited thermal resources at typical driving conditions.

A Waste Heat Recovery System for Light Duty Diesel Engines

2010 ◽  
Author(s):  
Thomas Edward Briggs ◽  
Robert Wagner ◽  
K. Dean Edwards ◽  
Scott Curran ◽  
Eric Nafziger
Keyword(s):  
Diesel Engines ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Waste Heat Recovery System ◽  
Light Duty ◽  
Recovery System ◽  
Heat Recovery System

scholarly journals ENERGY CONSUMPTION OF YAM SLICE DRYING IN AN EXHAUST GAS WASTE HEAT RECOVERY HOT AIR TRAY DRYER

2021 ◽  
Vol 9 (8) ◽  
pp. 1-7
Author(s):  
Ononogbo Chibuike ◽  
Dr. Nwufo Olisaemeka Chukwudozie ◽  
Dr. Nwakuba Nnaemeka Reginald ◽  
Dr. Okoronkwo Chukwunenye Anthony ◽  
Dr. Igbokwe Onyechege Johnson ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Exhaust Gas ◽  
Hot Air

Development of a Simulation Tool for Gas Co-Generation Systems

1999 ◽  
Author(s):  
Yukimaro Murata ◽  
Tomohiko Horizoe ◽  
Masahiro Oka
Keyword(s):  
Energy Consumption ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Simulation Models ◽  
Gas Absorption ◽  
Simulation Tool ◽  
Simulation Tools ◽  
Absorption Chillers ◽  
Running Cost

Abstract Tokyo Gas developed a new simulation tool for gas co-generation systems. We expect that this tool will help us in both developing co-generation components such as absorption chillers to utilize the waste heat of co-generation and making suggestion for optimum co-generation engineering. This simulation tool is superior to other simulation tools in simulation result accuracy and availability to complicated co-generation systems. It was achieved by new calculation logic and detailed description of features of co-generation components. This simulation tool can evaluate energy consumption and running cost of simulation models for buildings with co-generation systems. Tokyo Gas has used this simulation tool in development of three new gas absorption chiller heaters with auxiliary waste heat recovery and for energy consumption evaluation of many buildings with co-generation systems, which are so complicated that other simulation tools are not available.

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