Experimental data showing the thermal behaviour of a residential building in a hot and humid climate on three scenarios: An empty room with a closed door, an empty room with an open door, and a normal inhabited room

Data presented on this paper are from the collection on the experimental site during a 12 months period, corresponding to the two seasons of the year. The site is located in the city of Douala in Cameroon, in a hot and humid zone. The experimental premises are located above the ground floor of a storey-building. They are built of 20 cm thick hollow breezeblocks with interior and exterior cement plastering, and they consist of the following: an open uninhabited room; a closed uninhabited room; and an inhabited room. The data acquisition system was achieved by the thermo-hygrometers and the anemometer placed in the rooms in accordance with the ASHRAE 55 standard [1], on instruments for measuring thermal comfort parameters in buildings. Collected data consists of the following: temperature, relative humidity and air velocity outside the site; the temperature and relative humidity inside the different rooms. These parameters are collected with a one-hour time step. The matlab software is used to calculate the maximum, minimum, average and standard deviation for each measured parameter. several areas are used for data processing: the search for causal links between the climatic parameters of the site, and those of the indoor environments of the buildings; data prediction on a one year's history basis; the impact of each experimental scenario on the thermal behaviour of the room; the assessment of the heat transfer in the room; the evaluation of the potential for energy savings in the room.


a b s t r a c t
Data presented on this paper are from the collection on the experimental site during a 12 months period, corresponding to the two seasons of the year. The site is located in the city of Douala in Cameroon, in a hot and humid zone. The experimental premises are located above the ground floor of a storey-building. They are built of 20 cm thick hollow breezeblocks with interior and exterior cement plastering, and they consist of the following: an open uninhabited room; a closed uninhabited room; and an inhabited room. The data acquisition system was achieved by the thermohygrometers and the anemometer placed in the rooms in accordance with the ASHRAE 55 standard [1] , on instruments for measuring thermal comfort parameters in buildings.
Collected data consists of the following: temperature, relative humidity and air velocity outside the site; the temperature and relative humidity inside the different rooms. These parameters are collected with a one-hour time step. The matlab software is used to calculate the maximum, minimum, average and standard deviation for each measured parameter. several areas are used for data processing: the search for causal links between the climatic parameters of the site, and those of the indoor environments of the buildings; data prediction on a one year's history basis; the impact of each experimental scenario on the thermal behaviour of the room; the assessment of the heat transfer in the room; the evaluation of the potential for energy savings in the room. ©

Value of the Data
• Data collected is useful for researching the causal links between climatic parameters of the site and those of the indoor environment of buildings [ 2 , 3 ]. • Engineers and researchers in the field of energy, environment and civil engineering can benefit from the data as it can be used to predict energy consumption in residential buildings. • Data will be used to: develop models of thermal behaviour of the building in hot and humid climate; predict climatic parameters on the basis of 12 months of collected data; establish correlations between the collected parameters; simulate energy saving potential [4] .

Data Description
Data collected is grouped into 12-month series simultaneously in the three experimental rooms.
-Room C1 is open to the outdoor environment and is uninhabited. -Room C2 is closed and is uninhabited. The hourly data for each parameter are presented in the following Table 1 corresponding to the months of January to December: Table 1 Data for the month of January to December.

Data for the month of may
The changes in the monthly hourly averages are as follows: 30.08°C ± 3.00°C for T out ; 75.04% ± 9.36% for RH out ; 3.31 m/ s ± 1.87 m/s for V out ; 28.84°C ± 2.27°C for T C1 ; 79.41% ± 6.69% pour RH C1 ; 29.21°C ± 1.45°C for T C2 ; 82.38% ± 3.00% pour RH C2 ; 29.38 °C ± 1.48 °C for T C3 ; 79.12% ± 3.62% pour RH C3 ; ( continued on next page ) Monthly hourly averages of the experimental data presented in Table 1 are summarized in Figs. 1 and 2 below. Fig. 1 shows the evolution of monthly hourly average of air relative humidity. The highest of the monthly-mean air relative humidity is 90,94% in August and the lowest of the monthly-mean minimum air relative humidity is 75,75% in February.

Geographic and climatic location of the experimental site
The experiment was realised in Douala, a city in Cameroon which is a Central African country. The country extends from the Gulf of Guinea on the Atlantic Ocean to Lake Chad. It extends in length from approximately the 2nd to the 13th degree of North latitude, and in width from the 6th to the 16th degree of East longitude. Its spread and its openness to the sea over 350 km of coastline give it a wide variety of climates [ 4 , 5 ]. The city of Douala is located in a hot and humid zone. Average monthly data are collected over a period of nearly twenty years by the national meteorology of Cameroon [ 6 , 7 ]. Some data are presented on Fig. 3 below. Fig. 3 shows the evolution of outdoor air relative humidity (a) and temperature (b). In Fig. 3 a, the average of maximum relative humidity (OHmax) remains constant throughout the year and is approximately 97%, while the average of minimum relative humidity (OHmin) monthly varies between 59% and 77%. In Fig. 3 b, the ambient air temperatures do not vary by an extreme amount. Monthly, the average maximum air temperatures during the day are between 28 and 33 °C and the average of daily minimum air temperature are between 23 and 24 °C. The highest of the monthly-mean maximum air temperatures reaches 33 °C in February and the lowest of the monthly-mean minimum air temperatures is 23 °C in August

Experimental building
The experimental building is a modern one-storey building with cement block walls. Three almost identical modern rooms were built on the upper floor as shown in Figs. 4-6 attached. Fig. 4 shows the three (03) experimental rooms which have the same dimensions 2.95 × 3.15 × 3.20 m. The walls are made of 15 × 20 × 40 cm hollow agglomerated concrete blocks. The thickness of the cement mortar plaster is 2.5 cm, the white paint is applied to the interior and exterior walls. The floor is a slab floor covered with a 6 cm thick screed and 0.5 cm thick ceramic tiles. The roof is 0.5 mm aluminium sheets, with a 4 mm thick plywood ceiling. The ceiling height is 2.80 m.
On this plan, the data acquisition equipment is located in the experimentation rooms and in the outside environment: -Room C1 open uninhabited: wooden door and window open.     Fig. 6 shows the cross section of elements I and II of the experimental building.

Characteristics of data acquisition equipment
The data acquisition equipment consists of the thermo hygrometers and the anemometer.

Thermo hygrometers
These are relative humidity and temperature data loggers, model EXTECH RHT10 shown in Photo 1 attached.
This logger has the ability to simultaneously measure and save up to 16,0 0 0 relative humidity data and 16,0 0 0 temperature data.

Anemometer
This is a wind speed sensor. In this work, the "WINDVISU" model shown in Photo 2 below is used.
The characteristics of the anemometer are presented as follow: -General amplitude = 0 to 50 m/s -Precision is ± 3% -Resolution is 0.1

Computer
A laptop computer was used for data storage and data processing.

The inverter
An inverter is used to ensure the operation of the anemometer in case of short power failure.

Experimental protocol
Data were collected using thermohygrometers, then stored in the computer.

Data acquisition with thermohygrometers
Inside each of the three rooms (C1, C2 and C3), thermohygrometers are hung from the ceiling, 1.10 m from the floor, in compliance with the ASHRAE 55 standard [1] on instruments for measuring thermal comfort parameters in buildings. In the outdoor environment, there is another thermohygrometer responsible for acquiring the temperature and related humidity of the outdoor air. The data acquisition step is set at 1 h.

Data acquisition using the anemometer
The anemometer is placed above the roof of the building. It is set at a recording step of 1 h. A memory card is inserted. The card can record data for one year.

Data storage
Time data is collected for a period of one year, from January 2019 to December 2019. Data is immediately downloaded and stored on a dedicated computer Photos 3 and 4 .

Ethics Statement
All respondents participating in the experiment process provided their informed consent before participating.

Declaration of Competing Interest
The authors declare that they have no known competing interests.

Supplementary Materials
Supplementary material associated with this article can be found in the online version at doi: 10.1016/j.dib.2022.107906 .