scholarly journals Method and Case Study of Multiobjective Optimization-Based Energy System Design to Minimize the Primary Energy Use and Initial Investment Cost

Energies ◽  
2015 ◽  
Vol 8 (6) ◽  
pp. 6114-6134 ◽  
Author(s):  
Dong-Seok Kong ◽  
Yong-Sung Jang ◽  
Jung-Ho Huh
Keyword(s):  
Multiobjective Optimization ◽  
System Design ◽  
Energy Use ◽  
Energy System ◽  
Primary Energy ◽  
Investment Cost

Case study of green energy system design for a multi-function building in campus

2011 ◽  
Vol 1 (3) ◽  
pp. 152-163 ◽  
Author(s):  
S. Deng ◽  
Y.J. Dai ◽  
R.Z. Wang ◽  
X.Q. Zhai
Keyword(s):  
System Design ◽  
Energy System ◽  
Green Energy

scholarly journals Moving Towards Nexus Solutions to ‘Energy’ Problems: An Inclusive Approach

2021 ◽  
pp. 163-183
Author(s):  
Ralitsa Petrova Hiteva
Keyword(s):  
Energy Use ◽  
Energy Transition ◽  
Energy System ◽  
Capital City ◽  
Important Research ◽  
Urban Gardening ◽  
Inclusive Approach ◽  
Research Gap ◽  
The City

AbstractThis chapter offers an innovative approach to examining how fuel poverty in one of the most affected countries in the EU: Bulgaria can be examined as part of the urban nexus of food, water, energy and the environment. Building on bodies of literature of the nexus, fuel poverty, energy transitions and energy geographies, this chapter uses the example of energy provisioning in the capital city of Bulgaria: Sofia to illustrate how a more inclusive approach to addressing fuel poverty and air pollution can be developed. The case study unpacks the urban nexus by examining three practices: urban gardening, making zimnina, and heating and energy use in the home. It illustrates how the interdependencies between the practices of urban gardening, making zimnina and domestic heating and energy use have direct implications for the energy system of provisioning and can be important vectors in the energy transition for vulnerable citizens in the city. The chapter addresses an important research gap in urban nexus literature by offering a compelling empirical account of mapping nexus interactions through the perspective of vulnerable users, focusing on low-technological ways of managing the urban nexus (rather than technologically driven integration across sectors).

scholarly journals Controlled Mechanical Ventilation in Buildings: A Comparison between Energy Use and Primary Energy among Twenty Different Devices

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2123 ◽  
Author(s):  
Lamberto Tronchin ◽  
Kristian Fabbri ◽  
Chiara Bertolli
Keyword(s):  
Mechanical Ventilation ◽  
Energy Consumption ◽  
Thermal Energy ◽  
High Performance ◽  
Energy Use ◽  
Operating Cost ◽  
Primary Energy ◽  
Energy Requirements ◽  
Controlled Mechanical Ventilation

Indoor air quality (IAQ) of buildings is a problem that affects both comfort for occupants and the energy consumption of the structure. Controlled mechanical ventilation systems (CMVs) make it possible to control the air exchange rate. When using CMV systems, it is interesting to investigate the relationship between the useful thermal energy requirements for ventilation and the energy consumption of these systems. This paper addresses whether there is a correlation between these two parameters. The methodology used in this work involves the application of equations of technical Italian regulations UNI/TS 11300 applied to a case study. The case study is represented by a 54 m3 room, which is assumed to have three CMV systems installed (extraction, insertion, insertion and extraction) for twenty different devices available on the market. Afterwards, simulations of useful thermal energy requirements QH,ve and primary energy EP,V were performed according to the electrical power of each fan W and the ventilation flow. The results show that the two values are not linearly correlated: it is not possible to clearly associate the operating cost for CMV systems according to building requirements. The study also shows that CMV systems are particularly efficient for high-performance buildings, where there is no leakage that can be ascribed to windows infiltrations.

A weighted multi-objective optimisation approach to improve based facade aperture sizes in terms of energy, thermal comfort and daylight usage

2020 ◽  
pp. 174425912093004
Author(s):  
Yiğit Yılmaz ◽  
Burcu Çiğdem Yılmaz
Keyword(s):  
Thermal Comfort ◽  
Architectural Design ◽  
Energy Use ◽  
Building Design ◽  
Primary Energy ◽  
Building Performance ◽  
Indoor Environmental Quality ◽  
Multi Objective ◽  
Design Variables

In building design, the decision-makers should not focus only on energy efficiency as a single objective but indoor environmental quality indicators, such as thermal comfort, daylight usage and so on, should also be considered as a part of building performance. The building performance can be ensured by determining the proper performance indicators and the variables during the design. In this context, a weighted (among the objectives) multi-objective cost function was proposed, for the optimisation of energy, thermal comfort and daylight usage of a case study archetype design, through the selected design variables, considering the base architectural design principles as well. A typical social housing archetype design was determined as the case study to apply the proposed approach. The window sizes are optimised for each orientation simultaneously, for a temperate-humid climatic region. The results were evaluated in terms of improvement potentials of energy, thermal comfort and daylight performances, and the dominant values for the window sizes for each facade. According to the results, the optimised scenario achieved an 11.42% reduction in primary energy use equivalent to 181.24 kWh/m2a, a 4.52% reduction in a predicted percentage of dissatisfied with 9.12%, and a reduction in lighting energy of 4.94% equivalent to 21.17 kWh/m2a. These reductions verify the possibility to achieve higher performances on each criterion.

Open-Cycle Desiccant Air Conditioning as an Alternative to Vapor Compression Cooling in Residential Applications

1984 ◽  
Vol 106 (3) ◽  
pp. 252-260 ◽  
Author(s):  
J. J. Jurinak ◽  
J. W. Mitchell ◽  
W. A. Beckman
Keyword(s):  
Solar Energy ◽  
Air Conditioning ◽  
Energy Use ◽  
Energy System ◽  
Primary Energy ◽  
Vapor Compression ◽  
Air Conditioners ◽  
Open Cycle ◽  
Vapor Compression Cooling ◽  
Better Than

The performance of open-cycle desiccant air conditioners for residential applications is evaluated. The performance of these systems is compared to that of vapor compression air conditioners on the basis of primary energy use and cost. Systems with improved dehumidifiers can achieve seasonal COP’s on the order of 1.1. These systems, when coupled with a solar energy system to supply regeneration energy, are significantly better than conventional air conditioners on a primary energy basis, but are not presently cost-competitive.

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