Developing a Methodology for Comparing the Energy Efficiency of Hydraulic and Traction Elevators

2014 ◽  
Author(s):  
Jim Bos ◽  
Robert Dell ◽  
Brad Nemeth ◽  
C. S. Wei ◽  
William Foley
Keyword(s):  
Energy Efficiency ◽  
Energy Analysis ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Benefit Analysis ◽  
Study Results ◽  
The Usa ◽  
Measurement Methodology ◽  
Energy Equations

Traction elevators are hoisted by wire rope cables and hydraulic elevators are pushed by pressurized hydraulic fluid. Previous work published in IMEC2013-66663 presented methodologies for only traction elevator energy analysis. Many of the elevators in the USA are hydraulic. An objective and inclusive measurement methodology is needed for comparing energy efficiency of these two elevator systems for a valid cost benefit analysis. In this paper, the necessary requirements for a workable system for energy analysis are presented along with case study results. The previously presented elevator energy equations have evolved from simple kilogram-meters to watt-seconds for a more conventional energy analysis.

Developing a Methodology for Measuring the Comparative Energy Efficiency of Elevators

2013 ◽  
Author(s):  
Jim Bos ◽  
Robert Dell ◽  
C. S. Wei ◽  
William Foley
Keyword(s):  
Energy Efficiency ◽  
First Generation ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Energy Reduction ◽  
Benefit Analysis ◽  
Traffic Patterns ◽  
Measurement Methodology

Existing elevator systems are upgraded approximately every 20 years, providing an opportunity for energy reduction upgrades. This demands complicated analysis because elevators consume energy while at idle and in lifting modes. Traffic patterns, loads and building usage must also be considered in addition to energy recovering potentials. An objective and inclusive measurement methodology for measuring elevator energy efficiency is essential for a valid cost benefit analysis. The necessary requirements for a workable system and a usable first generation solution are presented.

The Use of Cost-Benefit Analysis for Evaluating Efficiency of Public Investment Projects (The Case of Sochi-2014 Winter Olympic Games)

2011 ◽  
pp. 57-78
Author(s):  
I. Pilipenko
Keyword(s):  
Net Present Value ◽  
Olympic Games ◽  
Cost Benefit Analysis ◽  
Public Investment ◽  
Cost Benefit ◽  
Investment Efficiency ◽  
Benefit Analysis ◽  
Step Method ◽  
Investment Projects ◽  
The Usa

The paper analyzes shortcomings of economic impact studies based mainly on input- output models that are often employed in Russia as well as abroad. Using studies about sport events in the USA and Olympic Games that took place during the last 30 years we reveal advantages of the cost-benefit analysis approach in obtaining unbiased assessments of public investments efficiency; the step-by-step method of cost-benefit analysis is presented in the paper as well. We employ the project of Sochi-2014 Winter Olympic and Paralympic Games in Russia to evaluate its efficiency using cost-benefit analysis for five accounts (areas of impact), namely government, households, environment, economic development, and social development, and calculate the net present value of the project taking into account its possible alternatives. In conclusion we suggest several policy directions that would enhance public investment efficiency within the Sochi-2014 Olympics.

scholarly journals The ALARP Principle in the Cost-Benefit Analysis for the Acceptability of Investment Risk

2018 ◽  
Vol 10 (12) ◽  
pp. 4668 ◽  
Author(s):  
Antonio Nesticò ◽  
Shuquan He ◽  
Gianluigi De Mare ◽  
Renato Benintendi ◽  
Gabriella Maselli
Keyword(s):  
Cost Benefit Analysis ◽  
Risk Mitigation ◽  
Cost Benefit ◽  
Economic Evaluations ◽  
Investment Risk ◽  
Benefit Analysis ◽  
Mitigation Design ◽  
The Cost

The process of allocating financial resources is extremely complex—both because the selection of investments depends on multiple, and interrelated, variables, and constraints that limit the eligibility domain of the solutions, and because the feasibility of projects is influenced by risk factors. In this sense, it is essential to develop economic evaluations on a probabilistic basis. Nevertheless, for the civil engineering sector, the literature emphasizes the centrality of risk management, in order to establish interventions for risk mitigation. On the other hand, few methodologies are available to systematically compare ante and post mitigation design risk, along with the verification of the economic convenience of these actions. The aim of the paper is to demonstrate how these limits can be at least partially overcome by integrating, in the traditional Cost-Benefit Analysis schemes, the As Low as Reasonably Practicable (ALARP) logic. According to it, the risk is tolerable only if it is impossible to reduce it further or if the costs to mitigate it are disproportionate to the benefits obtainable. The research outlines the phases of an innovative protocol for managing investment risks. On the basis of a case study dealing with a project for the recovery and transformation of an ancient medieval village into a widespread-hotel, the novelty of the model consists of the characterization of acceptability and tolerability thresholds of the investment risk, as well as its ability to guarantee the triangular balance between risks, costs and benefits deriving from mitigation options.

Sign in / Sign up

Export Citation Format

Share Document