scholarly journals Performance Optimization of a Parallel, Two Stage Stochastic Linear Program

2012 ◽  
Author(s):  
Akhil Langer ◽  
Ramprasad Venkataraman ◽  
Udatta Palekar ◽  
Laxmikant Kale ◽  
Steven Baker
Keyword(s):  
Performance Optimization ◽  
Linear Program ◽  
Two Stage ◽  
Stochastic Linear Program

scholarly journals Two-Stage Multi-Objective Meta-Heuristics for Environmental and Cost-Optimal Energy Refurbishment at District Level

2019 ◽  
Vol 11 (5) ◽  
pp. 1495 ◽  
Author(s):  
Diana Manjarres ◽  
Lara Mabe ◽  
Xabat Oregi ◽  
Itziar Landa-Torres
Keyword(s):  
Performance Optimization ◽  
Energy Demand ◽  
Harmony Search ◽  
Economic Assessment ◽  
District Level ◽  
The European Union ◽  
Two Stage ◽  
Nsga Ii ◽  
Multi Objective ◽  
Payback Time

Energy efficiency and environmental performance optimization at the district level are following an upward trend mostly triggered by minimizing the Global Warming Potential (GWP) to 20% by 2020 and 40% by 2030 settled by the European Union (EU) compared with 1990 levels. This paper advances over the state of the art by proposing two novel multi-objective algorithms, named Non-dominated Sorting Genetic Algorithm (NSGA-II) and Multi-Objective Harmony Search (MOHS), aimed at achieving cost-effective energy refurbishment scenarios and allowing at district level the decision-making procedure. This challenge is not trivial since the optimisation process must provide feasible solutions for a simultaneous environmental and economic assessment at district scale taking into consideration highly demanding real-based constraints regarding district and buildings’ specific requirements. Consequently, in this paper, a two-stage optimization methodology is proposed in order to reduce the energy demand and fossil fuel consumption with an affordable investment cost at building level and minimize the total payback time while minimizing the GWP at district level. Aimed at demonstrating the effectiveness of the proposed two-stage multi-objective approaches, this work presents simulation results at two real district case studies in Donostia-San Sebastian (Spain) for which up to a 30% of reduction of GWP at district level is obtained for a Payback Time (PT) of 2–3 years.

Performance optimization of single and two-stage micro/nano-scaled heat pumps with internal and external irreversibilities

2018 ◽  
Vol 232 ◽  
pp. 695-703 ◽  
Author(s):  
Wenjie Nie ◽  
Ke Lü ◽  
Aixi Chen ◽  
Jizhou He ◽  
Yueheng Lan
Keyword(s):  
Performance Optimization ◽  
Heat Pumps ◽  
Two Stage
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