Determination of Cost Savings Using Variable Speed Fans for Cooling Servers

2020 ◽  
Author(s):  
Minh Tran ◽  
Nicole Okamoto ◽  
Hussammedine Kabbani ◽  
Saeid Bashash
Keyword(s):  
Cost Savings ◽  
Variable Speed

Asymmetric Information, Public Goods and Central Control: A Critique of the West Review's Education Policy

2000 ◽  
Vol 44 (1) ◽  
pp. 76-90 ◽  
Author(s):  
Harry Clarke
Keyword(s):  
Education Policy ◽  
Education Program ◽  
Cost Savings ◽  
Central Control ◽  
University Management ◽  
Tertiary Sector ◽  
The West ◽  
Student Preferences ◽  
Research Activities

The ‘West Review’ argues that the determination of tertiary sector education program offerings should be decentralised by basing funding on student preferences. Research activities should be centrally prioritised with access to training being also dependent on such preferences. These views are questionable. Informational asymmetries imply that student sovereignty is a poor basis for designing programs and allocating research funds. Central prioritising cannot provide the benefits achievable in liberal structures which promote diversity. The Review's endorsement of centralised university management will realise measured cost savings but at the expense of quality.

Determination of rated wind speed for maximum annual energy production of variable speed wind turbines

2017 ◽  
Vol 205 ◽  
pp. 781-789 ◽  
Author(s):  
Ahmad Sedaghat ◽  
Arash Hassanzadeh ◽  
Jamaloddin Jamali ◽  
Ali Mostafaeipour ◽  
Wei-Hsin Chen
Keyword(s):  
Wind Speed ◽  
Wind Turbines ◽  
Energy Production ◽  
Variable Speed

Progressive Collapse Approach Compared to the Traditional Temperature Screening on Structural Assessment of Offshore Structures Against Fire

2016 ◽  
Author(s):  
Paula T. Nascimento ◽  
Marco A. P. Rosas ◽  
Leonardo Brandão ◽  
Fernando Castanheira
Keyword(s):  
Traditional Approach ◽  
Progressive Collapse ◽  
Screening Method ◽  
Substantial Reduction ◽  
Cost Savings ◽  
Offshore Structures ◽  
Significant Cost ◽  
Fire Scenarios

The present study compares the progressive collapse approach with the traditional temperature screening method on determination of PFP requirements at topside offshore structures. The advantage to evaluate the consequences of fire scenarios on the global integrity and stability of topside modules can be revealed by a substantial reduction of the required amount of PFP, and consequently significant cost savings for operators, when compared to the traditional approach. In the case study presented in this paper, there is a reduction of 79% in PFP allocation.

scholarly journals PENENTUAN WAKTU TANAM PADI SAWAH DI KABUPATEN SANGIHE DENGAN MENGGUNAKAN MODEL SIMULASI SHIERARY RICE

EUGENIA ◽  
2015 ◽  
Vol 21 (3) ◽  
Author(s):  
Farida Fattah ◽  
J. E.X. Rogi ◽  
Mariam M. Toding
Keyword(s):  
Cost Savings ◽  
Simulation Models ◽  
Field Capacity ◽  
Paddy Rice ◽  
Yield Potential ◽  
Potential Yield ◽  
Planting Time ◽  
The North ◽  
Humidity Field

ABSTRACT   Decline in rice production in Sangihe Island partly due to climate change and the implementation of a less precise planting time. Rice Shierary  model was used to predict the timing of planting paddy and has advantages in time and cost savings. This study aims to determine the exact time of planting in paddy rice crops in the district of South Manganitu, North Tabukan and Tamako, as well as to determine whether the results of the simulation model Shierary Rice together with the results obtained from the Central Bureau of Statistic Sangihe Islands. Input model consists of solar radiation, rainfall, temperature and humidity, field capacity, permanent wilting point, varieties, irrigation, nitrogen fertilization, longitude and latitude of the study area. While the output was paddy rice yield potential. It can be concluded that (a) the appropriate planting time of paddy in the South Manganitu namely in June with a potential yield of 4.25 tonha-1 and March with a potential yield of 3.88 tonha-1. (b) the appropriate planting time of paddy in the  North Tabukan namely in June with a potential yield of 4.27 tonha-1 and March with a potential yield of 3.62 tonha-1. (c) the appropriate planting time of paddy in Tamako ie in March with a potential yield of 3.58 tonha-1 and February with a potential yield of 3.28 tonha-1. (d) the yield of rice field paddy with the determination of planting time by using the model of Shierary Rice nearing/line with productivity results which obtained by the Central Statistics Agency (BPS) Sangihe Islands. Keywords: planting, paddy, simulation models, Shierary Rice

Graphic determination of available energy-saving potential in a reservoir pumping application with variable-speed operation

2018 ◽  
Vol 12 (5) ◽  
pp. 1041-1051
Author(s):  
Tero Ahonen ◽  
Santeri Pöyhönen ◽  
Joni Siimesjärvi ◽  
Jukka Tolvanen
Keyword(s):  
Energy Saving ◽  
Variable Speed ◽  
Energy Saving Potential ◽  
Available Energy ◽  
Graphic Determination

An Evaluation Of Agency Theory Influence In Pension Accounting

2011 ◽  
Vol 8 (1) ◽  
pp. 13 ◽  
Author(s):  
Gerald H. Lander ◽  
Alan Reinstein ◽  
Augustin K. Fosu
Keyword(s):  
Economic Theory ◽  
Agency Theory ◽  
Cost Savings ◽  
Financial Accounting ◽  
Future Cost ◽  
Pension Accounting ◽  
Accounting Standard ◽  
Pension Costs ◽  
Pension Benefits

The Financial Accounting Standard Board Standard No. 87 supersedes all other methods of accounting for pensions. However, many accountants think that this statement will also be superseded eventually since it contains several theoretical inconsistencies. The purpose of this article is first to apply agency theory to the determination of pension benefits, in order to show that pension costs represent a sharing of future cost savings in the employee-employer relationship. Some implications of the derived model are then applied to the provisions of SFAS No. 87. This model can thus be used to develop a consistent economic theory for pension accounting.

scholarly journals Domestic Retrofit Assessment of the Heat Pump System Considering the Impact of Heat Supply Temperature and Operating Mode of Control—A Case Study

2021 ◽  
Vol 13 (19) ◽  
pp. 10857
Author(s):  
Muhammad Abid ◽  
Neil Hewitt ◽  
Ming-Jun Huang ◽  
Christopher Wilson ◽  
Donal Cotter
Keyword(s):  
Heat Pump ◽  
Carbon Emissions ◽  
Heat Supply ◽  
Cost Savings ◽  
Operating Mode ◽  
High Heat ◽  
Variable Speed ◽  
Running Cost ◽  
Speed Mode ◽  
Very High

In this study, performance assessment of the variable speed compressor-based air source heat pump (ASHP) system as a domestic retrofit technology instead of fossil fuel-based heating technologies for the 1900s Mid terraced house is investigated. The assessment was conducted considering operating mode of control and heat supply temperature impact of the system. In the literature, ASHP system experimental development with variable speed mode (VSM) of control in comparison to fixed speed mode (FSM) of control at low to medium and high heat supply temperature in the context of UK was found with very limited number of studies, but without considering retrofit application. The focus of the earlier studies was on the individual components and performance improvement. The designed heat pump (HP), developed, and tested at constant heat load, simulating the real domestic heat demand under the controlled laboratory conditions and numerical modeling is utilized for the analysis purposes. The HP performance, energy demand, carbon emissions, and cost varies significantly due to changing heat supply temperature (35 °C, 45 °C, and 55 °C), control mode and accordingly the carbon emission and cost savings are achieved. The oil and gas boilers ranges from conventional to highly efficient type and evaluated in terms of annual running cost, energy consumptions, and carbon emissions in comparison with the HP system. Additionally, a comparative study with the existing retrofitted very high temperature ASHP inside the house is conducted. The developed HP at 55 °C could not defeat the very high heat supply temperature HP system (75 °C supply temperature) in performance and cost savings but become attractive at low supply temperature (35 °C). The HP system in VSM at low heat supply temperature instead of gas boiler (90% efficiency) could cut the annual carbon emissions by 59% but with additional 6% running cost for the Mid terraced test house in Belfast climatic conditions.

scholarly journals Determination of heat transfer coefficient of finned housing of a TEFC variable speed motor

2020 ◽  
Author(s):  
Payam Shams Ghahfarokhi ◽  
Ants Kallaste ◽  
Andrejs Podgornovs ◽  
Anouar Belahcen ◽  
Toomas Vaimann ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Variable Speed ◽  
Variable Speed Motor

Benefits of Monitoring Energy Use and Production Using Enhanced Smart Meters for California Houses

2012 ◽  
Author(s):  
Sergio Escobar Vargas ◽  
Jorge E. Gonzalez ◽  
Mark Aschheim
Keyword(s):  
Energy Use ◽  
Energy Savings ◽  
Cost Savings ◽  
Carbon Offsets ◽  
Smart Meters ◽  
Climatic Zones ◽  
Renewable Power ◽  
Financial Benefits ◽  
Time Determination

Methodologies have been developed to allow real-time determination of energy production and use as well as sizing of HVAC equipment based on thermal loads at the residential level. The data obtained reflect actual properties of the thermal envelope and appliance efficiencies, as well as actual renewable power production. The use of properly sized HVAC equipment introduces further energy savings. Recovery of energy savings expressed in terms of carbon offsets provides an incentive to improve the occupant’s energy footprint. When monetized, the energy cost savings and carbon offsets have financial benefits. These benefits are evaluated for model homes in various climatic zones within the state of California.

scholarly journals New formula proposal for the determination of variable speed pumps efficiency

RBRH ◽  
2018 ◽  
Vol 23 (0) ◽  
Author(s):  
José Nilton de Abreu Costa ◽  
Marco Aurélio Holanda de Castro ◽  
Luís Henrique Magalhães Costa ◽  
João Marcelo Costa Barbosa
Keyword(s):  
Rotation Speed ◽  
Operating Conditions ◽  
The Other ◽  
Energy Costs ◽  
Variable Speed ◽  
Empirical Formulas ◽  
Speed Reduction ◽  
Power And Energy ◽  
New Formula

ABSTRACT The use of pumps which work with variable rotation speed consists of an appropriate tactics for reduction of energy costs in the pump systems. In case of change in speed, the pump starts to work in a new flow pattern, head and efficiency values. Two empirical formulas can be found in the literature in order to estimate the final efficiency of a pump in this situation. This article aims at assessing the accuracy of these formulas and, next, to present a new proposal for the efficiency estimate in the new operating conditions. 50 pumps have been chosen and, for each of them, the above-mentioned formulas have been assessed in three procedures of speed reduction. The analysis of these equations’ accuracy has been accomplished by means of the comparison between the efficiencies estimated by them with the efficiencies calculated with the aid of the affinity laws. The results indicated that, in 95 of the 150 analysis procedures accomplished, the formula proposed presented estimates which have shown to be more precise than the other two formulas. It has also been possible to verify that the average of error detected through the procedure of the new formula (1.60%) has been lower than the average of the other two (1.93% and 2.22%). In light of this fact, the use of the equation here presented is considered advantageous since, from their more accurate efficiency estimates, the calculations for power and energy are also more precise.

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