Impact of insulation and wall thickness in compressed earth buildings in hot and dry tropical regions

Neya, Ibrahim; Yamegueu, Daniel; Coulibaly, Yézouma; Messan, Adamah; Ouedraogo, Arnaud Louis Sountong-Noma

doi:10.1016/j.jobe.2020.101612

Cited by 25 publications

(11 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At zero thermal inertia, the maximum heat leakage through the wall enters the chamber during the hottest time of the day. In this case, the refrigeration machine must operate with the maximum condensing temperature and the minimum values of the coefficient of performance (12), volumetric productivity (13) and adiabatic efficiency ( 14) of the compressor. At this time the maximum volumetric productivity of the compressor and the maximum mechanical power (15) are required to produce cold.…”

Section: Figure 5 Tl Impact In a Flat Roof On The Daily Dynamics Of The Operating Mode Of The Refrigeration System: 1 -Heat Leakage Into mentioning

confidence: 99%

“…High DF values help to improve conditions for constant temperature maintaining inside buildings. The need to find solutions to provide the proper level of comfort and to reduce energy consumption for heating and air conditioning in residential and public buildings has stimulated research activity and contributed to the publication of a wide range of scholarly works focused on the issue [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…A rational choice of building materials is important to reduce the cost of building walls at a given value of their thermal inertia. The research and studies of thermal inertia are carried out by methods of in situ experiments [9,[12][13][14][15][16][17] and mathematical simulations [6,7,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature Waves Phase Optimal Time Lag in the Refrigerated Warehouse Thermal Insulation

Myronchuk

Khmelniuk

2022

Gazi University Journal of Science

View full text Add to dashboard Cite

The thermal inertia of the wall manifests itself as a damping of amplitude (Decrement Factor) as well as a temperature wave phase lag (Time Lag) upon its passing through the wall. The objective of the research was to highlight the utilization prospects of these phenomena in the building envelops of large refrigerated warehouses. Numerical methods were used for nonlinear, non-stationary processes simulation. The relationship of the refrigeration cycle to the thermo-insulating walls of the cold store in the conditions of daily external temperature oscillations and solar radiation flux has been studied. As the ambient temperature rises, the power efficiency of the refrigeration cycle is decreasing and the need to increase the compressor displacement is growing. If the value of the phase delay in the wall is optimum, the daily minimum of the heat leakage through the wall enters the chamber with the phase shift for the period of maximum daily external temperature. This enables to smooth out the daily oscillations amplitudes of the heat load of the refrigerating machine as well as compressor power rating and to approximate their peak values closer to the average daily ones. The study had been concluded by demonstrating the possibility of reduction in: heat exchange areas for both condenser and evaporator, receiver volume, diameter of pipelines, material cost. Better conditions for temperature stabilization in the cold store will enhance the keeping quality and prolong the food products shelf life.

show abstract

Section: Figure 5 Tl Impact In a Flat Roof On The Daily Dynamics Of The Operating Mode Of The Refrigeration System: 1 -Heat Leakage Into mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Temperature Waves Phase Optimal Time Lag in the Refrigerated Warehouse Thermal Insulation

Myronchuk

Khmelniuk

2022

Gazi University Journal of Science

View full text Add to dashboard Cite

show abstract

“…To avoid this outcome, it is necessary to disseminate and accept cost-effective best practices and technologies as well as changes in behavior and lifestyle [13]. Therefore, it is necessary to evaluate the effect of thermal insulation parameters on the thermal performance of buildings [14]. Heat losses in buildings contribute significantly to buildings' poor energy performance.…”

Section: Availability Of Various Thermal Insulation Materialsmentioning

confidence: 99%

The Analysis of Small Investors’ Demands on a Thermal Insulation System for a Family House: A Case Study

2021

View full text Add to dashboard Cite

This study deals with small investors’ demands on thermal insulation systems when choosing the most suitable solution for a family house. By 2050, seventy percent of current buildings, including residential buildings, are still expected to be in operation. To reach carbon neutrality, it is necessary to reduce operational energy consumption and thus reduce the related cost of building operations and the cost of the life cycle of buildings. One solution is to adapt envelopes of buildings by proper insulation solutions. To choose an optimal thermal insulation system that will reduce energy consumption of building, it is necessary to consider the environmental cost of insulation materials in addition to the construction cost of the materials. The environmental cost of a material depends on the carbon footprint from the initial origin of the material. This study presents the results of a multi-criteria decision-making analysis, where five different contractors set the evaluation criteria for selection of the optimal thermal insulation system. In their decision-making, they involved the requirements of small investors. The most common requirements were selected: the construction cost, the construction time (represented by the total man-hours), the thermal conductivity coefficient, the diffusion resistance factor, and the reaction to fire. The confidences of the criteria were then determined with the help of the pairwise comparison method. This was followed by multi-criteria decision-making using the method of index coefficients, also known as the method of basic variant. The multi-criteria decision-making included thermal insulation systems based on polystyrene, mineral wool, thermal insulation plaster, and aerogels’ nanotechnology. As a result, it was concluded that, currently, in Slovakia, small investors emphasize the cost of material and the coefficient of thermal conductivity and they do not care as much about the carbon footprint of the material manufacturing, the importance of which is mentioned in this study.

show abstract

“…Burkina Faso had an urbanization rate of 32% in 2016, and this rate was estimated to be 34% in 2020 and 40% in 2025 (ONU Habitat, 2014). In this context, it becomes essential to be able to offer to local residents affordable, healthy and thermally comfortable housing adapted to increasingly severe climatic conditions (Hema et al , 2017; Neya et al ., 2020). Construction projects must include the concept of passive air conditioning to reduce thermal stress and increase the indoor thermal comfort of the occupants (Botti and Ramos, 2017).…”

Section: Introductionmentioning

confidence: 99%

A model for thermal comfort assessment of naturally ventilated housing in the hot and dry tropical climate

Ouedraogo

Messan

Yamegueu

et al. 2021

IJBPA

Self Cite

View full text Add to dashboard Cite

PurposeA major challenge faced by West Africa is to find comfortable housing as a result of climate change and population growth. The climatic adaptation of buildings and their indoor environment become an essential condition for maintaining the health and productivity of the occupants. This paper proposes a model to assess the thermal comfort of naturally ventilated buildings in hot and dry climates in Burkina Faso.Design/methodology/approachThe proposed method is an adaptive model which relies on a combination of parameters such as the operative temperature, the new effective temperature and the basic parameters of thermal comfort. It consists in proposing the zones of thermal comfort on the diagram of the humid air for each climatic region.FindingsA decision-making tool is set up for evaluating the comfort of buildings to better consider the bio-climatic concept through a long-term comfort index. This comfort index is defined and is used to assess the degree of thermal discomfort for various types of housing. Two natural ventilation pilot buildings located in Ouagadougou were considered. The results show that the pilot building whose wall are is made of Earth blocks achieves 26.4% of thermal comfort while the building made of hollow cement block achieves 25.8% of thermal comfort.Originality/valueThe decision-making tool proposed in the present study allow building stakeholders to better and easily design, assess and improve the thermal environment of buildings.

show abstract

Impact of insulation and wall thickness in compressed earth buildings in hot and dry tropical regions

Cited by 25 publications

References 38 publications

Temperature Waves Phase Optimal Time Lag in the Refrigerated Warehouse Thermal Insulation

Temperature Waves Phase Optimal Time Lag in the Refrigerated Warehouse Thermal Insulation

The Analysis of Small Investors’ Demands on a Thermal Insulation System for a Family House: A Case Study

A model for thermal comfort assessment of naturally ventilated housing in the hot and dry tropical climate

Contact Info

Product

Resources

About