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Article
Publication date: 16 June 2023

Haider Jouma Touma, Muhamad Mansor, Muhamad Safwan Abd Rahman, Yong Jia Ying and Hazlie Mokhlis

This study aims to investigate the feasibility of proposed microgrid (MG) that comprises photovoltaic, wind turbines, battery energy storage and diesel generator to supply a…

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Abstract

Purpose

This study aims to investigate the feasibility of proposed microgrid (MG) that comprises photovoltaic, wind turbines, battery energy storage and diesel generator to supply a residential building in Grindelwald which is chosen as the test location.

Design/methodology/approach

Three operational configurations were used to run the proposed MG. In the first configuration, the electric energy can be vended and procured utterly between the main-grid and MG. In the second configuration, the energy trade was performed within 15 kWh as the maximum allowable limit of energy to purchase and sell. In the third configuration, the system performance in the stand-alone operation mode was investigated. A whale optimization technique is used to determine the optimal size of MG in all proposed configurations. The cost of energy (COE) and other measures are used to evaluate the system performance.

Findings

The obtained results revealed that the first configuration is the most beneficial with COE of 0.253$/KWh and reliable 100%. Furthermore, the whale optimization algorithm is sufficiently feasible as compared to other techniques to apply in the applications of MG.

Originality/value

The value of the proposed research is to investigate to what extend the integration between MG and main-grid is beneficial economically and technically. As opposed to previous research studies that have focused predominantly only on the optimal size of MG.

Details

International Journal of Energy Sector Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1750-6220

Keywords

Article
Publication date: 7 October 2022

Césaire Hema, Philbert Nshimiyimana, Adamah Messan, Abdou Lawane and Geoffrey Van Moeseke

Appropriate thermal properties of walls can lead to the improvement of the indoor environment of buildings especially in countries with low energy availability such as Burkina…

Abstract

Purpose

Appropriate thermal properties of walls can lead to the improvement of the indoor environment of buildings especially in countries with low energy availability such as Burkina Faso. In order to benefit from these advantages, the thermal properties must be properly characterized. This paper investigates the impact of the design of single- and double-layer walls based on compressed Earth blocks (CEB) on the risk of indoor overheating.

Design/methodology/approach

First a building has been used as a tool to measure climate data. Then, a software program was used to define an accurate thermal model. Two indices were defined: weighted exceedance hour (WEH) related to the risk of overheating and cyclic thickness (ξ) related to the thermal properties of the walls. The aim is to define the appropriate values of ξ which minimized the WEH. The study also assesses the sensitivity of these thermal properties to occupancy profiles.

Findings

The results indicate the arrangements of the thermal properties that can promote comfortable environments. In single-layer wall buildings, ξ = 2.43 and ξ = 3.93 are the most suitable values to minimize WEH for the room occupied during the day and night, respectively. If a double-layer wall is used, ξ = 1.42 and CEB layer inside is the most suitable for the room occupied during the day, while ξ = 2.43 and CEB outside should be preferred in the case of a room with night occupancy profile.

Originality/value

The findings indicate that occupation patterns at room scale should be systematically considered when dealing with wall design in order to improve the thermal comfort.

Details

International Journal of Building Pathology and Adaptation, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2398-4708

Keywords

Article
Publication date: 4 December 2023

Vinh Tuan Nguyen and Cat Tuong Phuoc Nguyen

The current study aims to examine the relationship between self-compassion and life satisfaction in Vietnamese adolescents and investigate the possibility that emotional and…

Abstract

Purpose

The current study aims to examine the relationship between self-compassion and life satisfaction in Vietnamese adolescents and investigate the possibility that emotional and behavioural problems mediate this relationship.

Design/methodology/approach

Quantitative means of data collection and analysis were used to investigate the relationship between self-compassion and life satisfaction and the underlying mechanism of this relationship. A set of questionnaires was presented to a sample of 828 adolescents (M age = 14.61; SD = 1.08) aged 14–17 years from two secondary schools and two high schools in Thua Thien Hue Province, Vietnam. This helped to determine their self-compassion (self-compassion scale), emotional and behavioural problems (strengths and difficulties questionnaire) and life satisfaction (life satisfaction scale). Instruments reflected satisfactory reliability and validity.

Findings

The results show that self-warmth was positively associated with life satisfaction and that self-coldness was positively associated with emotional and behavioural problems and negatively associated with life satisfaction in Vietnamese adolescents. Emotional and behavioural problems fully mediated the negative relationship between self-coldness and life satisfaction.

Practical implications

It is implied that intervention programmes should be tailored to both promote self-compassionate behaviours and reduce self-coldness, to increase life satisfaction in adolescents.

Originality/value

The research available on the relationship between self-compassion and life satisfaction in adolescents, especially adolescents from Southeast Asia, is very sparse. More significantly, the underlying mechanisms behind this relationship are not yet fully understood.

Details

Mental Health and Social Inclusion, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2042-8308

Keywords

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