Energy Savings From System Efficiency Improvements in Iowa's HVAC SAVE Program

2013 ◽  
Author(s):  
S. Yee ◽  
J. Baker ◽  
L. Brand ◽  
J. Wells
Keyword(s):  
Energy Savings ◽  
System Efficiency

scholarly journals The Effects of Fuel Price and System Efficiency on Cost and Energy Savings in a Distributed Energy System

2006 ◽  
Vol 5 (2) ◽  
pp. 429-434 ◽  
Author(s):  
Yongwen Yang ◽  
Weijun Gao ◽  
Yingjun Ruan ◽  
Ji Xuan ◽  
Chris Marnay ◽  
...  
Keyword(s):  
Energy Savings ◽  
Energy System ◽  
System Efficiency ◽  
Distributed Energy ◽  
Fuel Price ◽  
Distributed Energy System

scholarly journals Energy Efficient Lighting in Plant Factories: Addressing Utilance

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2570
Author(s):  
Jens Balasus ◽  
Janis Blank ◽  
Sebastian Babilon ◽  
Tim Hegemann ◽  
Tran Quoc Khanh
Keyword(s):  
Energy Efficient ◽  
Energy Savings ◽  
Electrical Energy ◽  
Dynamic Adaptation ◽  
System Efficiency ◽  
Additional Increase ◽  
Crop Size ◽  
Artificial Lighting ◽  
Lighting Conditions ◽  
Vertical Farming

Vertical farming is considered to play a crucial role in future food supply. Until today, the high amount of electrical energy required for artificial lighting has been problematic in this context. Various possibilities for increasing efficiency through adapted lighting conditions have been and are being investigated. However, comparably little attention is paid to increasing utilance, i.e., the amount of photons that can effectively be used by the plant. In this work, a novel targeted lighting strategy is therefore proposed that allows for a dynamic adaptation of the luminaires’ light distribution to match the effective crop size at each stage of plant growth in a fully-automated manner. It is shown that the resulting utilance can significantly be increased compared to standard full-coverage lighting. Moreover, it is found that the proposed strategy is likely to consume less than half of the electrical energy usually required for the latter. An additional increase in system efficiency can be prognosticated and the potential energy savings are estimated based on assumptions of future LED generations derived from literature.

Investigation of Accumulator Parameters for a Novel Hybrid Architecture

2020 ◽  
Vol 32 (5) ◽  
pp. 876-884
Author(s):  
Seiji Hijikata ◽  
Kazuhisa Ito ◽  
Hubertus Murrenhoff ◽  
◽  
Keyword(s):  
Hybrid System ◽  
Energy Savings ◽  
Combustion Engine ◽  
Pressure Level ◽  
Operating Costs ◽  
Hybrid Architecture ◽  
Total System ◽  
System Efficiency ◽  
Pressure System ◽  
Gas Volume

An open center system (OC-System), which is one of the major hydraulic architectures for excavators, has been improved in the world to reduce fuel consumption for global environment conservation and lower operating costs. However, the total system efficiency, including the internal combustion engine (ICE), has not been thoroughly considered. In contrast, a constant pressure system (CP-System) enabling the engine to be driven optimally is developed, but is not accepted in the industry owing to the complexity of the required components. Thus, in this research, a hybrid system combining an OC-System with a CP-System is proposed to improve the total system efficiency. An accumulator, which is used to provide flow rate to actuators, is essential for the new hybrid system, and it is vital to consider the nominal gas volume and pressure level for the accumulator in terms of energy savings and initial cost. Therefore, the influences of accumulator volume and pressure level are discussed in this paper.

On PID-Controller Parameters Neural Tuner Usage for Nonlinear Plants Control

2015 ◽  
Vol 789-790 ◽  
pp. 1101-1106
Author(s):  
Yuri Eremenko ◽  
Dmitry Poleshchenko ◽  
Anton Glushchenko ◽  
Andrey Fomin
Keyword(s):  
Pid Controller ◽  
Energy Savings ◽  
Rule Base ◽  
System Efficiency ◽  
Backpropagation Method ◽  
Nonlinear Plants ◽  
Online Tuning ◽  
Required Quality ◽  
Nonlinear Plant ◽  
Plant Control

The problem of a control system efficiency increasing for nonlinear plant control is considered. It is shown that proposed neural tuner based on neural networks is an efficient approach to solve the problem of PID-controller parameters online tuning. The backpropagation method is used to train the network. This method is modified by adding a rule base containing conditions on choosing learning rate for neurons. Experiments are made for plant models with various parameters values (with a time constant about 103seconds and 101seconds). The required quality for each transient is determined. The system with the neural tuner allows to achieve 10% decreasing of the amount of time and 9% of energy-savings in comparison with the conventional PID-controller.

Copenhagen Agreement - A New Paradigm of Climate Problem Solving

2010 ◽  
pp. 115-132 ◽  
Author(s):  
S. Agibalov ◽  
A. Kokorin
Keyword(s):  
Climate Change ◽  
Energy Savings ◽  
Global Climate ◽  
Climate Change Policy ◽  
New Order ◽  
Paradigm Shifts ◽  
New Paradigm ◽  
Energy Efficiency Policy ◽  
Policy Paradigm ◽  
Change Policy

Copenhagen summit results could be called a failure. This is the failure of UN climate change policy management, but definitely the first step to a new order as well. The article reviews main characteristics of climate policy paradigm shifts. Russian interests in climate change policy and main threats are analyzed. Successful development and implementation of energy savings and energy efficiency policy are necessary and would sufficiently help solving the global climate change problem.

Pilot trials of hemicelluloses extraction prior to thermomechanical pulp production: Part 1

TAPPI Journal ◽  
2011 ◽  
Vol 10 (5) ◽  
pp. 21-28 ◽  
Author(s):  
CARL HOUTMAN ◽  
ERIC HORN
Keyword(s):  
Oxalic Acid ◽  
Energy Savings ◽  
Wood Chip ◽  
Strength Properties ◽  
Thermomechanical Pulp ◽  
Sugar Solution ◽  
Bisulfite Treatment ◽  
Pilot Trials ◽  
Pulp Production ◽  
Production Part

Pilot data indicate that wood chip pretreatment with oxalic acid reduced the specific energy required to make thermomechanical pulp. A combined oxalic acid/bisulfite treatment resulted in 21% refiner energy savings and 13% increase in brightness for aspen. A low level of oxalic acid treatment was effective for spruce. Energy savings of 30% was observed with no significant change in strength properties. Adding bisulfite did not significantly increase the brightness of the spruce pulp. For pine, the optimum treatment was a moderate level of oxalic acid, which resulted in 34% energy savings and an increase in strength properties. For all of these treatments 1–3 w/w % carbohydrates were recovered, which can be fermented to produce ethanol. The extract sugar solution contained significant quantities of arabinose.

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