scholarly journals PVT -- A photovoltaic/thermal concentrator total energy system: Final phase 1 project report. Building opportunities in the U.S. for photovoltaics (PV:BONUS) Two

1998 ◽  
Author(s):  
Keyword(s):  
Total Energy ◽  
Phase 1 ◽  
Energy System ◽  
Final Phase ◽  
Project Report ◽  
The U.S

scholarly journals Modelling and simulation of solar thermal power generation network

2021 ◽  
Vol 25 (4 Part B) ◽  
pp. 2905-2912
Author(s):  
Bowen Wang
Keyword(s):  
Power Generation ◽  
Total Energy ◽  
Thermal Power ◽  
Energy System ◽  
Solar Thermal ◽  
Generation System ◽  
Solar Thermal Power ◽  
Power Generation System ◽  
Thermal Power Generation ◽  
Solar Thermal Power Generation

In the smart grid context, the article combines SEGS-VI solar thermal power station parameters to establish a solar thermal power generation system model. The thesis is based on the First and Second laws of thermodynamics. It uses the white box model analysis method of the energy system to calculate the solar thermal power generation system-concentrating and collecting subsystem, heat exchange subsystem, and power subsystem to obtain the subsystems dissipation of each process. Finally, the article uses the white box model analysis of the total energy system to treat the subsystems as white boxes, and connects them to form a white box network, makes a reasonable evaluation of the energy consumption status of the total energy system, and finds the weak links in the energy use process of the system. Provide a basis for system energy saving.

Shaping Our Future With Sustainable Energy: A Direction From Young Engineers

2012 ◽  
Author(s):  
Jan Fabian Feldhoff ◽  
Carina Hofmann ◽  
Stefan Hübner ◽  
Jan Oliver Kammesheidt ◽  
Martin Kilbane ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Electricity Market ◽  
Energy Demand ◽  
Power Plants ◽  
Sustainable Energy ◽  
Energy System ◽  
Local Context ◽  
Global Energy ◽  
Sustainable Energy System ◽  
The U.S

It is broadly accepted that current energy systems should become more sustainable in both a global and local context. However, setting common goals and shared objectives and determining the appropriate means by which to get there is the subject of heavy debate. Therefore, the American Society of Mechanical Engineers (ASME) and the German Association of Engineers (VDI) initiated a joint project aimed at providing a young engineers’ perspective to the global energy conversation. The young engineer project teams set a common goal of assembling a completely sustainable energy system for the U.S. and Germany by 2050. This includes not only the electricity market, but the overall energy system. Based on the current global energy paradigm, a completely sustainable energy system seems very ambitious. However, multiple analyses show that this path is possible and would in the medium to long run not only be desirable, but also competitive in the market. This future ‘energy puzzle’ consists of many important pieces, and the overall picture must be shaped by an overarching strategy of sustainability. Besides the many detailed pieces, four main critical issues must be addressed by engineers, politicians and everybody else alike. These challenges are: i) Rational use of energy: This uncomfortable topic is rather unappealing to communicate, but is a key issue to reduce energy demand and to meet the potentials of renewable energy carriers. ii) Balancing of electricity demand and generation: This is a challenge to the electricity markets and infrastructures that are currently designed for base-load, mainly fossil power plants. The overall mix of renewable energy generation, storage technologies, grid infrastructure, and power electronics will decide how efficient and reliable a future energy system will be. iii) Cost efficiency and competitiveness: It is a prerequisite for industrialized countries to stay competitive and to establish RE in the market. Developing economic technologies while at the same time establishing a strong RE market is the secret of success. iv) Acceptance of the system and its consequences: The best energy strategy cannot be realized without broad public acceptance for it. Therefore, the understanding of the energy technologies and an objective discussion must be promoted — without old fashioned emotionalizing of certain risks. The paper will present details on the four mentioned aspects, compare the situations between the U.S. and Germany, and propose solutions for appropriate political frame conditions to achieve a sustainable energy system.

scholarly journals Energy-Related Input Demand by Crop Producers

1983 ◽  
Vol 15 (2) ◽  
pp. 63-69 ◽  
Author(s):  
James B. Kliebenstein ◽  
Francis P. McCamley
Keyword(s):  
Total Energy ◽  
Energy Use ◽  
Fiber Production ◽  
Senate Committee ◽  
Farm Level ◽  
Threefold Increase ◽  
Input Demand ◽  
Level Production ◽  
The U.S

Energy use in U.S. production of food and fiber is extensive and has increased rapidly. A threefold increase occurred from 1940 to 1970 (Carter and Yonde). Food and fiber production accounted for about 13 percent of the total energy consumed in the U.S. in 1980 (Duncan and Webb). Of the total energy use in food and fiber production, farm level production directly consumes about 21 percent (U.S. Senate Committee on Agriculture and Forestry).

A Theoretical Study on Decentralized Space Heating System

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Zhi-Ping Song
Keyword(s):  
Energy Conservation ◽  
Total Energy ◽  
Global Climate ◽  
Energy System ◽  
Specific Consumption ◽  
Space Heating ◽  
Full Potential ◽  
Heating Systems ◽  
End Use ◽  
The Impact

Global climate change mitigation requires the fossil fuel consumption substantially reduced. Space heating is an energy-consuming sector. Despite the fact that the thermal efficiency of current space heating systems has achieved a value higher than 85%, corresponding to lower than 40kg c.e./GJ, there is still a big potential for energy conservation. In order to realize the full potential, investigations of heating systems should appeal to reversibility/exergy analysis made on total energy concept basis. This paper starts with an introduction of the concept “reversible mode of heating,” leading the readers think of space heating in terms of reversibility. Right after, a systematic reversibility analysis on a “mine to home” basis is conducted to reveal the impact of any irreversibility of all subsystems or devices involved in the total energy system of heating on the fuel/monetary specific consumption of unit end-use heat. The paper points out that although combined heat and power (CHP) and electrically driven heat pump are both of “reversible mode,” the former is far more favorable in terms of energy conservation. The recently ascent decentralized energy system provides the best circumstances for CHP implementation. The demand-side improvement is a topic of most importance but frequently neglected. This study reveals that, if properly engineered, this improvement together with adopting a direct type of heat grid might lower the fuel specific consumption of end-use heat of CHP to a level as low as 13–9kg c.e./GJ.

Total energy system analysis of heating

Energy ◽  
2000 ◽  
Vol 25 (9) ◽  
pp. 807-822 ◽  
Author(s):  
Zhi-Ping Song
Keyword(s):  
Total Energy ◽  
System Analysis ◽  
Energy System ◽  
Energy System Analysis

scholarly journals Phase 1 Testing of the Redundant Internal Mechanical Start System for the Ship Service Gas Turbine Generator Sets on the U.S. Navy’s DDG-51 Class Ships

1997 ◽  
Author(s):  
Dennis M. Russom ◽  
William E. Masincup ◽  
John Eghtessad
Keyword(s):  
Gas Turbine ◽  
Systems Engineering ◽  
Phase 1 ◽  
Extended Period ◽  
Turbine Generator ◽  
Turbine Engine ◽  
Generator Sets ◽  
Life Predictions ◽  
Successful Phase ◽  
The U.S

The Redundant Independent Mechanical Start System (RIMSS) is a gas turbine powered, mechanically coupled start system for the Allison AG9140 Ship Service Gas Turbine Generator Sets (SSGTGs) of the U.S. Navy’s DDG-51 Class ships. The system will be original equipment on DDG-86 and follow. It will also be a candidate for backfit onto earlier DDG-51 Class ships. This paper describes RIMSS and details a very successful phase of the RIMSS program. All U.S. Navy testing was conducted on an Allison AG9140 located at the Carderock Division, Naval Surface Warfare Center-Ship Systems Engineering Station, DDG-51 Gas Turbine Ship Land Based Engineering Site (NSWCCD-SSES LBES), Figure 1. The test agenda included 516 SSGTG starts and 75 SSGTG motoring cycles. The primary goal was to validate engine life predictions for the Allison 250-C20B gas turbine engine in the RIMSS application. A secondary goal was to evaluate the overall RIMSS system during an extended period of operation.

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