Development of an open-loop ground source cooling system for space air conditioning system in hot climate like Indonesia

Jalaluddin,; Miyara, Akio; Ishikawa, S.; Tarakka, Rustan; Mochtar, Andi Amijoyo

doi:10.1051/matecconf/201820404007

Cited by 5 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, 'touchy' means to feel grief or unhappiness, or be in a distress mood [51]. Indonesia has two seasons, the dry season and the rainy season [52], and the dry season is often characterized by a hot climate [53]. During this season, most women are affected by the extremely hot weather, which eventually affects their psychological state.…”

Section: Discussionmentioning

confidence: 99%

Translation and validation of the Depression Anxiety Stress Scales for menopausal women in Indonesia

2022

View full text Add to dashboard Cite

Objective: This study evaluated the construct validity of the Depression Anxiety Stress Scales-21 (DASS-21) for menopausal women in Indonesia. Methods: This cross-sectional study included 236 women aged 45-60 years and assessed internal consistency using Cronbach's a. The study used convenience sampling. Test-retest reliability was measured twice on an extra 30 women at 1-week and 2-week intervals. Confirmatory factor analysis (CFA) was employed to investigate its structural model fit.Results: The intraclass correlation coefficient for the test-retest reliability ranged between 0.95 and 0.96. The overall Cronbach's a coefficient of the DASS-21 was 0.95. The CFA results indicated that the goodness-of-fit index was 0.85, comparative fit index was 0.95, root-mean-square error of approximation was 0.07, related fit index was 0.91 and normed fit index was 0.92. Conclusions: This study's results indicated that the DASS-21 has satisfactory validity and reliability for detecting depression, anxiety and stress in menopausal women in Indonesia.

show abstract

Section: Discussionmentioning

confidence: 99%

Translation and validation of the Depression Anxiety Stress Scales for menopausal women in Indonesia

2022

View full text Add to dashboard Cite

show abstract

“…They found that a GSHP is able to save 30% of required space cooling energy compared to a conventional air conditioner. Miyara, Ishikawa [22] developed and investigated the performance of a GSHP system for space cooling in Indonesia. The results found that the proposed geothermal-based cooling system is appropriate for cooling buildings in a hot climate like Indonesia.…”

Section: Introductionmentioning

confidence: 99%

An Assessment of Long-Term Climate Change on Building Energy in Indonesia

Shah,

Graham,

Burton

et al. 2023

Energies

View full text Add to dashboard Cite

This paper reports on modelling outcomes for improvements to building energy performance in Indonesia. Long-term climate effects due to building energy demand and carbon emissions are also considered. The global change assessment model (GCAM) was used to generate the related end-user building energy data, including socioeconomics, for urban areas of Indonesia. As a comprehensive study, the total life cycle of carbon in the building sector and the concept of zero-carbon buildings, including energy efficiency, zero-emissions electricity and fuel-switching options, were considered. Building shell conductance (U-value) of the building envelope, floor area ratio (FAR), air conditioner (AC) efficiency, electrical appliance (APL) efficiency, rooftop photovoltaic (PV) performance and ground source heat pump (GSHP) systems were considered as parameters to mitigate carbon emissions under the operational energy category in the GCAM. Carbon mitigation associated with the cement production process was considered in the raw material category. Urban population and labour productivity in Indonesia were used as base inputs with projected growth rates to 2050 determined from the available literature. Low growth rate ‘LowRate’ and high growth rate ‘HighRate’ were considered as variable inputs for U-value, FAR, AC efficiency, APLs efficiency and PV capacity factor to model emissions mitigation. The energy consumption of the GSHP was compared to the conventional reverse cycle ACs to identify the potential of the GSHP as a fuel-switching option. In the GCAM, the benchmark (base case scenario) data set was generated based on input parameters (urban population and labour productivity rate) only for the residential building sector in Indonesia. Total potential carbon emissions mitigation was found to be 432 Mt CO2-e for the residential building sector in Indonesia over 2020–2050. It was found that an average of 24% carbon emissions mitigation could be achieved by 2020–2030 and 76% by 2031–2050.

show abstract

“…The development of water heating technology to produce hot water has been studied in the Renewable Energy Laboratory of Hasanuddin University. The possibility of producing hot water using a hybrid system with a ground source cooling system has been investigated [12][13][14]. The use of a V-shape absorber plate shown an increase in the absorptivity of the absorber plate [15] and integrated with various PCM materials such as paraffin wax [16].…”

Section: Introductionmentioning

confidence: 99%

Study of Modified Absorber Plate with Aluminium Foam of Solar Water Heating System

Basri

Jalaluddin

Tarakka

et al. 2023

AMM

Self Cite

View full text Add to dashboard Cite

Solar water heating system (SWHS) is water heating equipment that utilizes solar energy for domestic and industrial needs. An absorber plate is the main part of the SWHS that functions to absorb solar energy. Porous materials are efficient in increasing heat transfer, energy efficiency, energy storage, and reducing reflectance losses. Efforts have been made to add aluminium foam as a porous material on the lower and upper surfaces of the absorber plate. Porous materials function absorb heat and store radiant heat energy before being transferred to the fluid. Experimental tests were carried out by testing three models of absorber plates on a solar thermal energy unit with similar conditions. The first model is a standard flat plate (SFP) without aluminium foam. The second model combines standard flat plate and aluminium foam (SFP-TAF), placed on top of the SFP. The third model combines standard flat plate and aluminium foam (SFP-BAF), placed under the SFP. The results showed that the SFP-BAF model has a higher thermal efficiency than the other models. The SFP-BAF model has an efficiency increase of 2.71 % at a flow rate of 10 L/h and 5.39 % flow rate of 12 L/h compared with the standard model (SFP). The position of the aluminium foam at the bottom surface is substantial enough to help absorb and store radiant heat for transfer to circulating water.

show abstract

Development of an open-loop ground source cooling system for space air conditioning system in hot climate like Indonesia

Cited by 5 publications

References 7 publications

Translation and validation of the Depression Anxiety Stress Scales for menopausal women in Indonesia

Translation and validation of the Depression Anxiety Stress Scales for menopausal women in Indonesia

An Assessment of Long-Term Climate Change on Building Energy in Indonesia

Study of Modified Absorber Plate with Aluminium Foam of Solar Water Heating System

Contact Info

Product

Resources

About