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Journal articles on the topic 'Climatic chamber'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 April 2022

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1

Ramezani, Bahareh, António Tadeu, Tiago Jesus, Michael Brett, and Joel Mendes. "Evaluation of the Thermofluidic Performance of Climatic Chambers: Numerical and Experimental Studies." Fluids 6, no. 12 (November 30, 2021): 433. http://dx.doi.org/10.3390/fluids6120433.

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Climatic chambers are highly important in research and industrial applications and are used to examine manufactured samples, specimens, or components in controlled environment conditions. Despite the growing industrial demand for climatic chambers, only a few published studies have specifically concentrated on performance analysis and functional improvements through numerical and experimental studies. In this study, a 3D computational fluid dynamics (CFD) model of a climatic chamber was developed using Ansys Fluent to simulate the fluid flow, heat, and mass transfer to obtain the velocity, temperature, and relative humidity fields in the interior box of a 1200 L climatic chamber. The results were then validated with experimental data from a prototype. Finally, the heat losses of the surrounding components of the chamber were calculated, and the relationship between the inside temperature and the overall thermal loss was modelled. This validated numerical model provides the possibility of optimising the performance of climate chambers by reducing the thermal loss from the walls and modifying the air flow pattern inside the chamber.

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2

Klein, Lorin. "Unique Test Capabilities of the Eglin AFB McKinley Climatic Laboratory." Journal of the IEST 30, no. 6 (November 1, 1987): 27–29. http://dx.doi.org/10.17764/jiet.1.30.6.l3663m6017674334.

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The 92,900m3 (3.28 million ft3) Main Chamber of the Climatic Laboratory (Figure 1) is the largest and most complex climatic environmental test chamber in the world. It employs an air makeup system to cool or heat air to the test temperatures and ingest this air into the chamber to allow the operation of jet engines during climatic tests. Other test chambers discussed are the 2,750 m3 (97,000 ft3) Engine and Equipment Test Facility and the 2,125 m3 (75,000 ft3) Sun, Wind, Rain, and Dust Facility.

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3

Coveney, D. "Climatic Engineering." Journal of the IEST 33, no. 1 (January 1, 1990): 70–79. http://dx.doi.org/10.17764/jiet.2.33.1.j76t20tj1525g10n.

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Facilities at Canada's National Research Council for research into the effects of climate on engineering equipment are described. The Low Temperature Laboratory currently operates a large climatic test chamber, two smaller cold chambers, a cold chest for extremely cold temperatures, an icing tunnel, a helicopter icing facility, and a heat pump calorimeter. The capabilities and limitations of the test chambers are illustrated through descriptions of a variety of tests. Growth of ice on objects and the development and calibration of icing detectors in the icing tunnel are described to illustrate the capabilities of the tunnel. A description is presented of the inflight evaluation of helicopter performance in a supercooled vapor cloud produced by the helicopter icing facility.

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Sukamto, D., F. Gloriant, and M. Siroux. "Improved value of temperature different on climatic chamber climatic chamber for thermal conditions." IOP Conference Series: Materials Science and Engineering 673 (December 10, 2019): 012116. http://dx.doi.org/10.1088/1757-899x/673/1/012116.

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5

Bagoňa, Miloslav, Stanislav Tóth, and Richard Baláž. "Roof Structure Evaluation in Climatic Chamber Module." Advanced Materials Research 1041 (October 2014): 239–42. http://dx.doi.org/10.4028/www.scientific.net/amr.1041.239.

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The paper focuses on the assembly of equipment in experimental climate chambers with their respective sample envelopes and fenestration systems, which are involved in a measuring experiment. The prime aim is to design a logical and transparent system for gathering, evaluating and storing hygrothermal related data. This contribution further illustrates the installation of measurement points in test samples, the system of monitoring their physical properties, measurement results of roof system of the climatic chamber module and vapour barrier influence in roof structure on temperature damping phase shift.

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6

ABA, Muhammad Ulin Nuha, Bayu Wahyudi, and Mohamad Sofie. "PERANCANGAN PEMANTAUAN SUHU CLIMATIC CHAMBER BERBASIS ARDUINO DILENGKAPI HEATER DAN PELTIER." Elkom : Jurnal Elektronika dan Komputer 14, no. 1 (June 26, 2021): 105–13. http://dx.doi.org/10.51903/elkom.v14i1.334.

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The climatic chamber is a calibration medium for the thermohygrometer. This simple climatic chamber was built using the Arduino uno, DHT22 sensor, heater, and peltier. The climatic chamber was designed and manufactured well and cheaply. Climatic chamber testing of the design results is carried out to determine the success rate of the tool. Tests are carried out using the Madgetech data logger tool through monitoring or monitoring of temperature within a certain period of time. The results of temperature monitoring at two observed values, namely temperatures of 250C to 300C and temperatures of 300C to 350C, showed good results with the corresponding rhythm of temperature increase and temperature decrease. It's just that the decrease in temperature still takes longer than the increase in temperature. This shows that the heater can be said to be working optimally and the peltier is not fully working. So it is necessary to do further studies related to the peltier for the climatic chamber both in terms of number and characteristics.

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7

Tistomo, Arfan Sindhu, Melati Azizka Fajria, Rachman Soleh, and Dwi Larasati. "PENGGUNAAN TERMOKOPEL DALAM KALIBRASI CLIMATIC CHAMBER." Instrumentasi 44, no. 1 (July 7, 2020): 53. http://dx.doi.org/10.31153/instrumentasi.v44i1.183.

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8

Lozada, Catalina, Bernardo Caicedo, and Luc Thorel. "Improved climatic chamber for desiccation simulation." E3S Web of Conferences 9 (2016): 13002. http://dx.doi.org/10.1051/e3sconf/20160913002.

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9

Rudawska, Anna, Radovan Madleňák, Lucia Madleňáková, and Paweł Droździel. "Investigation of the Effect of Operational Factors on Conveyor Belt Mechanical Properties." Applied Sciences 10, no. 12 (June 19, 2020): 4201. http://dx.doi.org/10.3390/app10124201.

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This paper aims to present the effect of specific operational factors (temperature and humidity) on the selected mechanical properties of a conveyor belt. The tests were conducted in a climatic chamber, simulating the effect of both minus and plus temperatures −30 °C to 80 °C (243 K to 353 K) at specific humidity, and in a thermal shock chamber where a varying number of ageing cycles was applied for a specific range of thermal shocks. Six different tests in the climatic chamber and four different tests in a thermal shock chamber were conducted. The results of the climatic chamber tests demonstrate that many strength parameters have undesired values at a temperature of 10 °C (283 K) and 80 °C (353 K) at a relative humidity of 80%. Interestingly, the results revealed that tensile strength, tensile modulus and yield strength are higher at below 0 °C temperature than at above 0 °C temperature. For example, comparing the temperature −30 °C (243 K) and +30 °C (303 K) obtained a difference of tensile modulus of nearly 10%, and comparing the temperature −30 °C (243 K) and +10 °C (283 K) the differences were 22%.

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10

Gawlik, Artur, Piotr Kucybała, Danuta Owczarek, and Janusz Pobędza. "Accreditation of research in the thermo-climatic chamber - various aspects." MATEC Web of Conferences 183 (2018): 01009. http://dx.doi.org/10.1051/matecconf/201818301009.

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One of the important aspects in the implementation of new products for production in the open field is the assessment of the impact of environmental conditions on their operation. Typically thermo-climatic research is carried out for such project. The laboratory of Techno-climatic Research and Heavy Duty Machines of Cracow University of Technology, equipped with a large-sized thermo-climatic chamber conducts this type of research. Bearing in mind the assurance of high quality of the conducted research, the quality management system (QMS) was developed and implemented. The article describes the requirements, scope and process of obtaining a Polish Centre for Accreditation (PCA) certificate.

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Daems, David, Antoine Tilmans, Timo De Mets, and Xavier Loncour. "Design of an advanced hot box-cold box with full climatic control to test heat, air and moisture transport through real scale building elements." E3S Web of Conferences 172 (2020): 19008. http://dx.doi.org/10.1051/e3sconf/202017219008.

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A versatile hot box-cold box test facility called HAMSTER enables to evaluate the energy and hygrothermal performance of up to 3m high, 3m wide and 3.6m deep building test elements including walls, flat or pitched roofs and floors. This equipment allows for the precise measurement of thermal performance according to standards. It also allows for the study of heat, air and moisture phenomena taking place in building elements under realistic climatic conditions including the effects of rain, sun or wind. Interior and exterior climates are simulated in, respectively, the hot and cold chambers by controlling the temperature, relative humidity, pressure difference between both chambers, infra-red or solar simulator heating and water spraying in the cold chamber. Critical issues that have been solved during the design and construction phases in order to reach both the required performances and the versatility of the test facility are discussed.

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Cascione, Valeria, Eugenio Cavone, Daniel Maskell, Andy Shea, and Pete Walker. "The effect of air velocity on moisture buffering." MATEC Web of Conferences 282 (2019): 02007. http://dx.doi.org/10.1051/matecconf/201928202007.

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Hygoscopic finishing materials improve the indoor hygrothermal comfort and air quality, as they reduce the extremes of variation in relative humidity. This property, known as moisture buffering, is related to the capacity of hygroscopic materials to adsorb and desorb moisture from the air. Air velocity plays an important role on the sorption performances of materials: increasing the air speed leads to increased moisture buffering capacity. In order to obtain comparable results, several moisture buffering protocols require the air speed to be constant and around 0.1 m/s during tests. However, those tests are usually performed in climatic chambers, where air speed cannot be controlled and the flow may not be homogenous. The aim of this study is to demonstrate, that positioning test specimens in different locations within the same chamber gives different moisture buffering value results, due to the non-homogenous air speed distribution. For this reason, air velocity has been monitored, measuring the differential pressure and air speed in different locations in a climatic chamber. Moisture buffering tests have been performed in six locations of the chamber and a correlation between the two analyses has been evaluated. The significance of this paper is to understand the relationship between air speed and moisture buffering performances, in order to determine an air velocity correction factor, which enables the moisture buffering value to be evaluated when existing protocols cannot be adhered.

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13

Stankevičius, Vytautas, Valdas Paukštys, Raimondas Bliužius, Jolanta Šadauskienė, Zenonas Turskis, and Rolandas Samajauskas. "CONVECTION IN MINERAL WOOL USED AS INSULATION FOR BUILDINGS." Journal of Civil Engineering and Management 19, no. 2 (April 18, 2013): 296–304. http://dx.doi.org/10.3846/13923730.2013.775182.

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The paper considers the velocities of air movement in the ventilated air gaps of walls and focuses on pressure fields in both wall models arranged in a climatic chamber and exploited houses. The article investigates the influence of air movement on heat transfer through walls applying numerical modelling methods and conducting experiments in the climatic chamber. The thermal effects of air flows have been described with reference to the Nusselt number defined as the ratio of average convective and conductive heat fluxes and heat flux through still air

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14

Steckel, Vera, Anna Knöpfle, and Martin Ohlmeyer. "Effects of climatic test parameters on acetic acid emission from beech (Fagus sylvatica L.)." Holzforschung 67, no. 1 (January 1, 2013): 47–51. http://dx.doi.org/10.1515/hf-2011-0237.

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Abstract Acetic acid (AA) emission from beech samples was studied in test chambers operated according to ISO 16000 part 9 and as a function of temperature and relative humidity (RH). The impact of RH was higher than that of temperature. AA emission was about 45% higher at 75% RH than under standard parameters (50% RH, 23°C). Probably, RH influences AA emission both by enhanced hydrolysis of acetyl groups, as well as by facilitating the release of AA into the surrounding air by diffusion. The concentration of AA in test chamber air was determined with thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS) as well as with ion chromatography (IC). Both techniques provided similar results. The values measured by IC ranged constantly 15% below those obtained with TD-GC-MS. This can be ascribed to losses during sampling of test chamber air.

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15

Nadaraia, Konstantine V., Dmitry V. Mashtalyar, Mariia S. Gerasimenko, Mariia I. Piatkova, Sergey L. Sinebryukhov, and Sergey V. Gnedenkov. "Changes in Wettability and Corrosion Properties of Coatings Obtained on MA8 Magnesium Alloy after Accelerated Climatic Tests." Key Engineering Materials 910 (February 15, 2022): 684–89. http://dx.doi.org/10.4028/p-lu09le.

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In the presented study, changes in the wettability and corrosion properties of composite coatings formed on the MA8 magnesium alloy by plasma electrolytic oxidation (PEO) with subsequent treatment with organofluorine polymers were investigated after accelerated climatic tests in a salt spray chamber. It was found by the sessile drop method that after accelerated climatic tests the contact angle decreases by 2.5 times for PEO coatings, and by 15o for composite coatings. Evaluation of the electrochemical properties of the composite layers revealed an insignificant decrease in the value of the corrosion current density after 40 days of holding samples in a salt spray chamber.

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16

Grochalski, Karol, Michał Wieczorowski, Bartosz Jakubek, and Paweł Pawlus. "Climatic Chamber for the Credibility Evaluation of Profilometric Measurements." Advances in Science and Technology Research Journal 14, no. 3 (September 1, 2020): 135–40. http://dx.doi.org/10.12913/22998624/122298.

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17

Suits, L. D., T. C. Sheahan, Julián Tristancho, Bernardo Caicedo, Luc Thorel, and Nelson Obregón. "Climatic Chamber With Centrifuge to Simulate Different Weather Conditions." Geotechnical Testing Journal 35, no. 1 (2012): 103620. http://dx.doi.org/10.1520/gtj103620.

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18

Khort, Dmitriy, Alexey Kutyrev, Rostislav Filippov, and Stepan Semichev. "Magnetic pulse processing of strawberries in the climatic chamber." E3S Web of Conferences 247 (2021): 01038. http://dx.doi.org/10.1051/e3sconf/202124701038.

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The article presents the results of experimental studies on the magnetic pulse treatment of strawberries in a climatic chamber. The analysis of the obtained data showed that the greatest effect from the treatment of plants with a low-frequency magnetic pulse field in the phase of peduncle formation was obtained on plants that were treated with a magnetic induction equal to 4 MT, a pulse repetition frequency of 32 Hz and a duty cycle of 20. The relationship between the parameters of low-frequency magnetic pulse radiation and the photosynthetic activity of the leaf apparatus at various stages of ontogenesis, and the qualitative composition of fruits at the stage of maturation is revealed. The high sensitivity of plant organisms to the effects of energy factors, the parameters of which differ in exposure and physical factors, is shown. At the same time, the nature of the response of plants is complex, ambiguous and is determined not only by the electrophysical parameters of the electric field, but also by the specific, varietal and technological features of the crop.

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19

Prokšová Zuská, Lenka, and Michal Kabrhel. "A METHOD FOR EVALUATION OF NON-UNIFORM RADIANT-CONVECTIVE LOAD ON HUMAN BODY DURING MENTAL WORK." Acta Polytechnica 57, no. 5 (October 31, 2017): 340–47. http://dx.doi.org/10.14311/ap.2017.57.0340.

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The objective of this study was to develop a documentation for the amendment of the microclimatic part of the Czech Government Regulation, particularly in a non-uniform radiant-convective load evaluation. Changes in regulation were made based on experimental data obtained on a group of experimental individuals in a climatic chamber. One of the objectives of the climatic chamber experiments was to evaluate whether there was a possibility to use an alternative method, which utilizes a new value – stereotemperature, for the assessment. A group of 24 women was exposed to a non-uniform radiant-convective load in a climatic chamber for 1 hour during their computer work. Measurements were divided according to the globe temperature into 3 stages. The physical parameters of air were continuously measured: the air temperature, globe temperature, air velocity, radiant temperature, relative humidity, stereotemperature and physiological parameters. Thermal sensations of experimental subjects were expressed in the seven-point scale according to EN ISO 7730. The thermal sensation correlated very well with the difference of stereotemperature and the globe temperature. The stereotemperature correlated very well with the radiant temperature. In this work, the composed equations were used to develop the limit values for the thermal stress evaluation in the uniform and non-uniform thermal environment at workplaces. It is possible to determine how the body of an exposed person perceives the non-uniform climatic conditions in the indoor environment, by adding the stereotemperature to government regulations.

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20

Bosma, R., R. J. Pouw, W. van Schaik, and A. Peruzzi. "Climatic chamber for dew-point temperatures up to 150 °C." Metrologia 55, no. 4 (July 13, 2018): 597–608. http://dx.doi.org/10.1088/1681-7575/aacecc.

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21

Dostál, J., and L. Ferkl. "Model Predictive Control of Climatic Chamber with On-off Actuators." IFAC Proceedings Volumes 47, no. 3 (2014): 4423–28. http://dx.doi.org/10.3182/20140824-6-za-1003.01571.

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22

van Geel, J. L. W. A., R. Bosma, J. van Wensveen, and A. Peruzzi. "Thermistors Used in Climatic Chamber at High Temperature and Humidity." International Journal of Thermophysics 36, no. 2-3 (October 9, 2014): 569–76. http://dx.doi.org/10.1007/s10765-014-1753-7.

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23

Marigo, Marco, Giulia Alessio, Sara Bordognon, Enrico Prataviera, Laura Carnieletto, Beatrice Biasia, Antonino Di Bella, Michele De Carli, and Angelo Zarrella. "The CORE-CARE laboratory to investigate the indoor environmental quality in buildings." E3S Web of Conferences 343 (2022): 01003. http://dx.doi.org/10.1051/e3sconf/202234301003.

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In this work, the climatic chamber CORE-CARE is presented. The laboratory was built at the Industrial Engineering Department of the University of Padova, in order to further investigate issues related to indoor environmental quality, the comfort perceived by people in confined spaces and thermal performance of radiant systems. CORE-CARE is equipped with radiant panels in each surface, which can be controlled separately. The room presents two real windows on the East side, equipped with shading systems. Furthermore, the mechanic controlled ventilation system installed in the room can act as integration of sensible or latent heat both in heating and in cooling conditions. The climatic chamber is provided with a data acquisition system, consisting of 38 sensors, that allow the evaluation of the surface temperatures in different positions, the air temperature at different heights, the mean radiant temperature, relative humidity and CO2 concentration. The CORE-CARE chamber is thermally characterized using a detailed model developed at the Industrial Engineering Department of the University of Padova and the simulations results are compared with test measurements. Moreover, the impact of radiant asymmetry is investigated.

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24

Que, Ze Li, Ling Fei Ma, Fei Bin Wang, and Takeshi Furuno. "Evaluation of Formaldehyde Emission from Particleboard Using the Large Chamber and Desiccator Method." Applied Mechanics and Materials 260-261 (December 2012): 738–43. http://dx.doi.org/10.4028/www.scientific.net/amm.260-261.738.

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The formaldehyde emission from particleboard using different method was investigated in this study. It was found that there is a good correlation between different air exchange rates as they relate to the same product-loading ratio in the large chamber. There was also an indication of a generic correlation between the large chamber and the two-hour desiccator test with a single product designated loading ratio, air exchange rate, and climatic conditions.

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25

Binar, Tomáš, Jana Zimáková, Pavel Šafl, and Marie Sedlarikova. "Simulating the Climatic Impact on Vehicle Engine Function Parts." ECS Transactions 105, no. 1 (November 30, 2021): 531–39. http://dx.doi.org/10.1149/10501.0531ecst.

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The paper describes the assessment of the influence of climatic conditions, temperature and relative humidity on the lifespan of the cylinder forming the functional part of the vehicle TATRA 815 6x6 VVN. Based on the measured notch-toughness value in the test temperature range -80 °C to +100 °C, the corrosion effect on specimens with and without corrosion protection was evaluated. A condensation chamber was used to simulate corrosion conditions which can cause corrosion and degradation process in the material leading to lifetime reduction and limit state development. The duration of the corrosion laboratory tests in the condensation chamber considered the real time when the TATRA 815 6x6 VVN vehicle is exposed to climate change on an open area in the fleet. There were three sets of samples for simulations with different number of cycles (9, 18 and 27 cycles).

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26

Shin, Dae Uk, Woo Bin Bae, Yun Mi Park, Sang Rae Kim, and Yong Gil Kim. "Method for evaluating the heat-island mitigation effect of porous/water-retentive blocks using a climatic chamber." Water Science and Technology 80, no. 5 (September 1, 2019): 855–63. http://dx.doi.org/10.2166/wst.2019.343.

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Abstract This paper presents a method and mock-up design for evaluating the heat-island mitigation effect of porous/water-retentive blocks in a climatic environmental chamber using ambient temperature measurements. To create the proposed method, the heat circulation mechanism of blocks was considered. From this, we specified the climatic chamber design requirements, determined the required components and equipment for the mock-up, and developed the proposed method for evaluating heat-island mitigation performance based on ambient temperature. Using the proposed mock-up design and method, we confirmed that both surface and air temperatures were lower when porous/water-retentive blocks were installed compared to conventional blocks. This method can be used to analyze the difference between surface and ambient temperatures under various conditions to quantify the heat-island mitigation performance of different materials according to ambient temperature.

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27

Lebed, N. I., I. V. Volkov, M. B. Lebed, and Ya V. Kalinin. "MULTISECTIONAL CLIMATE CHAMBER FOR ACCELERATED PRODUCTION OF CULTURAL PLANTS UNDER CONTROLLED PARAMETERS." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 3(250) (March 26, 2021): 66–68. http://dx.doi.org/10.35211/1990-5297-2021-3-250-66-68.

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The analysis of existing technical means for growing plants in controlled conditions of artificial climate is given. The concept of a multi-section climatic chamber is substantiated, design options are proposed, as well as a block diagram of automated control.

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BIELACZYC, Piotr, Dariusz KLIMKIEWICZ, Joseph WOODBURN, and Andrzej SZCZOTKA. "Exhaust emission testing methods – BOSMAL’s legislative and development emission testing laboratories." Combustion Engines 178, no. 3 (July 1, 2019): 88–98. http://dx.doi.org/10.19206/ce-2019-316.

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The latest legislation regarding the reduction of harmful exhaust emissions, greenhouse gases and fuel consumption determines not only maximum permissible emissions factors, but also emissions testing methods and laboratory design and additionally leads to the development of new research methods. BOSMAL has risen to meet these challenges by investing in an updated, state-of-the-art emissions testing laboratory, housed within a climate chamber and in parallel investing in a completely new laboratory designed with incoming and future legislative requirements in mind. This paper presents BOSMAL’s improved M1/N1 vehicular emissions and fuel consumption laboratory in a climatic chamber and BOSMAL’s standard chamber for the testing of vehicles in accordance with European Union, US and Japanese standards. The specifications, capabilities and design features of the sampling, analysis and development research possi-bilities and climate simulation systems are presented and discussed in relation to the increasing drive for cleaner, light duty road vehi-cles (including hybrids and electric vehicles). The recently-renovated laboratory with extended standard temperature range and the laboratory with climatic chamber are described in the context of the newest European Union legislation on the emission in the range of Euro 6d testing requirements. The laboratories permit BOSMAL’s engineers to compete in the international automotive arena in the development of new, more ecologically friendly and increasingly fuel efficient vehicles.

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García-Contreras, Reyes, Arántzazu Gómez, Pablo Fernández-Yáñez, and Octavio Armas. "Estimation of thermal loads in a climatic chamber for vehicle testing." Transportation Research Part D: Transport and Environment 65 (December 2018): 761–71. http://dx.doi.org/10.1016/j.trd.2017.11.010.

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30

Monerris Belda, Oscar, Elena Diaz Caballero, Jesus Ruiz Garnica, and Vicente E. Boria. "Automatic, Calibrated and Accurate Measurement of S-Parameters in Climatic Chamber." IEEE Microwave and Wireless Components Letters 25, no. 6 (June 2015): 412–14. http://dx.doi.org/10.1109/lmwc.2015.2421330.

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31

Kadlec, M., J. Zimakova, and D. Fryda. "Optimization of Conditions in Climatic Chamber Designed for Curing Positive Electrodes." ECS Transactions 63, no. 1 (November 17, 2014): 231–36. http://dx.doi.org/10.1149/06301.0231ecst.

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32

Alhassan, W. S., V. Buvanendran, and O. W. Ehoche. "Seasonal influences in milk production in Friesian-Bunaji crosses in northern Nigeria." Journal of Agricultural Science 104, no. 1 (February 1985): 231–33. http://dx.doi.org/10.1017/s0021859600043173.

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It has been found from controlled environment studies that high temperatures lead todepressions in milk production (Johnson, 1965; Hafez, 1968; McDowell, 1972). Under outdoor situations where all climatic variables may act simultaneously on the animal, responses may vary from the classical chamber studies.

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33

Grgec Bermanec, L., I. Matas, and D. Zvizdic. "Traceable calibration of pressure based water level data loggers." ACTA IMEKO 9, no. 5 (December 31, 2020): 349. http://dx.doi.org/10.21014/acta_imeko.v9i5.998.

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This paper investigates accuracy, influence of temperature variations and time drift of water level data loggers, operating on a principle of hydrostatic pressure measurement. The laboratory setup for calibration of such devices, equipped with self-designed pressure chamber and commercial climatic chamber is presented. Calibration procedure for logger’s built-in pressure transducer, with ensured traceability to the primary standards of pressure and temperature, is proposed. Influence of temperature on the pressure reading was examined by conducting calibration at 10 °C, 15 °C and 25 °C.

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Šafl, Pavel, Jana Zimáková, and Tomáš Binar. "Environment Influence on the Properties of Functional Parts Made of HIPS Material." ECS Transactions 105, no. 1 (November 30, 2021): 431–40. http://dx.doi.org/10.1149/10501.0431ecst.

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The aim of this work is to study the climatic influences on 3D printed materials. This study focuses on the HIPS material, which was chosen as the starting material for further studies. The material in the field of 3D printing is known for its rapid photooxidation, which results in the formation of cracks in the final product. A climatic chamber was used for degradation, in which UV light, heat and increased humidity were applied to the material. The degree of degradation was then checked by tensile test and electron microscope.

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Prokopiev, Il'ya Andreyevich, Igor Vitalievich Sleptsov, and Lena Nikolayevna Poryadina. "INFLUENCE OF TEMPERATURE CONDITIONS ON THE ACCUMULATION OF PRIMARY AND SECONDARY METABOLITES BY LICHENS FLAVOCETRARIA CUCULLATA AND CETRARIA LAEVIGATA." chemistry of plant raw material, no. 3 (September 27, 2021): 227–33. http://dx.doi.org/10.14258/jcprm.2021039170.

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The study of the effect of temperature on the accumulation of primary and secondary metabolites by lichens Flavocetraria cucullata (Bellardi) Kärnefelt & Thell and Cetraria laevigata Rass was carried out. Lichen samples were taken out from under the snow (-20 °C) together with the soil substrate and transferred to the climatic chamber. Then the temperature in the climatic chamber was sequentially increased to +10 and +20 °C. The lichen exposure was carried out for 30 days for each temperature regime. The analysis of primary metabolites was performed by gas chromatography-mass spectrometry. It was shown that in lichens F. cucullata and C. laevigata at temperatures of +10 and +20 °C, an increase in the content of mannitol, ribitol, sucrose, and hydroxyproline was observed, as well as a decrease in the content of unsaturated fatty acids as compared to the initial samples. At the same time, the content of glycerol and arabitol in the thalli of the initial lichens (-20 °C) was higher than after exposure at +10 and +20 °C, which, apparently, is associated with the cryoprotective properties of these compounds. The content of secondary metabolites in lichens was determined by high performance liquid chromatography. It was shown that the content of usnic, allo-protolichesterinic, and protolichesterinic acids in F. cucullata increased after exposure in a climatic chamber, which may be associated with a general activation of metabolic processes with an increase in temperature. At the same time, the content of fumarprotocetraric acid in C. laevigata lichens decreased at temperatures of +10 and +20 °C compared to the initial samples, which may be associated with its protective properties under the action of low-temperature stress.

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Martynov, Gleb V., Daria E. Monastyreva, and Natalia S. Astafieva. "Adhesive compound of composite materials in conditions of accelerated climatic aging." Vestnik MGSU, no. 4 (April 2021): 429–37. http://dx.doi.org/10.22227/1997-0935.2021.4.429-437.

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Introduction. Pultruded fiberglass can be called the material of the future due to its properties — high strength, low weight, resistance to aggressive environment. Important aspects for the development of composite materials are surface treatment methods and methods of connecting structural elements. Glue compound has proven itself as the most effective, but there remains a need to conduct studies of its durability. The method of accelerated cyclic thermal tests allows to determine the expected changes in the strength of adhesive bonding in a short time. Materials and methods. Samples, which are three glued plates of SPPS fiberglass construction, were processed in a climate chamber and after each cycle they were tested on a GRM-1 machine. One climatic test cycle included being in a chamber with high humidity and temperature and then moving into the cold chamber. The specimens were tested prior to spalling, and the resulting disruptive stresses were recorded. The last test cycle corresponded to five years of operation of the structure. Results. The tests of the samples showed a significant change in the characteristics of the compounds over time. In the first two years of operation, a decrease in strength of 25 % is expected. The last characteristic test point, corresponding to five years, showed a drop to 60 % of the initial characteristics. Conclusions. The results should be considered at the design stage of supporting structures that are not protected from contact with the external environment. The factors of strength reduction after 100 years may be included in the regulatory documents for the calculation of especially important structures.

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Mazzeo, Domenico, Nicoletta Matera, Natale Arcuri, and Francesco Barreca. "A multilayer panel in cork and natural phase change materials: thermal and energy analysis." E3S Web of Conferences 312 (2021): 02003. http://dx.doi.org/10.1051/e3sconf/202131202003.

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This paper presents thermal and energy analysis of a multilayer panel in bio-based cork material and natural phase change materials (PCMs) for the development of prefabricated, recyclable and energy-efficient and autonomous building modules. For this purpose, a calculation tool is developed for the dynamic simulation of the thermal and energy behaviour of the sandwich panel. In particular, through an extensive parametric survey, the panel is sized with the identification of the arrangement of the layers, PCM temperature, and layer thicknesses to optimize the insulating and damping properties, considering typical climatic conditions of the Mediterranean climates of Southern Italy. From the conducted simulations, the types of sandwich panels that have the best insulating and storage characteristics for the building module construction were chosen. The results of these simulations will be used in future research for the preliminary design of tests to be carried out in a climatic chamber and to build a building module in real conditions to be constantly monitored through the automatic instrumental survey of internal and external physical quantities such as temperature, humidity and radiant temperature.

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Peñarrubia-María, E., J. Avilla, and L. A. Escudero-Colomar. "Survival of Wild Adults ofCeratitis capitata(Wiedemann) under Natural Winter Conditions in North East Spain." Psyche: A Journal of Entomology 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/497087.

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The overwintering of the Mediterranean fruit fly (medfly),Ceratitis capitata(Wiedemann) at the northern limits of its geographic distribution is not yet well known. With the aim of estimating the survival rate of medfly adults in northeast Spain under natural winter conditions, a two-winter-season trial was carried out. A control was carried out in a climatic chamber at 25°C. The results showed that medfly adults were unable to survive the entire winter season in the Girona area. Climatic conditions, including the daily minimum temperature, daily maximum temperature and the high rainfall, appeared to be involved in adult mortality in winter.

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Lozada, Catalina, Bernardo Caicedo, and Luc Thorel. "A new climatic chamber for studying soil–atmosphere interaction in physical models." International Journal of Physical Modelling in Geotechnics 19, no. 6 (November 2019): 286–304. http://dx.doi.org/10.1680/jphmg.17.00073.

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Mac Lochlainn, D., M. White, S. Wettstein, R. Farley, C. Aicken, and R. Gee. "A Comparison of Climatic Chamber Hygrothermal Characterization Techniques as Described in IEC60068." International Journal of Thermophysics 36, no. 8 (May 1, 2015): 2199–214. http://dx.doi.org/10.1007/s10765-015-1889-0.

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Palková, Adela, Ľuboš Kamenický, and Milan Palko. "Condensation of Water Vapour in the Functional Gap of Window - Experimental Measurement of Exfiltration at 15 Pa." Applied Mechanics and Materials 820 (January 2016): 285–92. http://dx.doi.org/10.4028/www.scientific.net/amm.820.285.

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The article is focused on the experimental analysis of water vapour in functional gap of wooden window. The experimental measurements were held in a laboratory of heat engineering of the Slovak university of Technology in Bratislava – in a big climatic chamber for synergic phenomena of heat transfer, water vapour diffusion and air filtration.

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Malpica Gutierrez, Johan S., Ismael A. Fernández Peña, and Fernando Martínez Santa. "Design, construction and implementation of relative humidity and temperature climatic chamber for metrology laboratory." Journal of Physics: Conference Series 2135, no. 1 (December 1, 2021): 012003. http://dx.doi.org/10.1088/1742-6596/2135/1/012003.

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Abstract For the calibration of thermohygrometers it is necessary to have a means of generating temperature and relative humidity for this reason in this development we will build a climatic chamber which will generate and control these two magnitudes. For the generation of temperature a thermoresistance was used and the decrease of relative humidity was done through a silica gel trap through which the air inside the chamber is recirculated with the use of a vacuum pump. On the other hand, an ultrasonic humidity generator also known as fogger was used to increase the relative humidity. For the construction of the chamber, acrylic was used as the main material, since it is translucent and facilitates the visualization of the thermohygrometers’ indications. For the control of the process variables such as temperature and relative humidity, an Arduino card was used, which through PWM pulse width modulation, the control was performed achieving a variation of 0.3 °C and 2 %RH, which will be evaluated by an accredited laboratory in the characterization of isothermal media certified by ONAC, since it is in this way that the inhomogeneity, stability and thermal load of the medium, components that affect the uncertainty of the instruments under calibration, are evaluated. It should be remembered that this development was carried out in order to create an air medium with which temperature and relative humidity measuring instruments can be calibrated in the metrology laboratory VALIDACIONES Y METROLOGIA LM S.A.S., since it is in the process of growth and one of its main objectives is to be accredited in the magnitudes of temperature and relative humidity before the accreditation body in Colombia (ONAC), which is the entity that will finally give the technical approval to release the chamber and put it into operation.

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Moran, Kory, Sandra Chamusco, and Tobias Aumiller. "PSVI-4 Effect of Phytogenic Feed Additives on Ammonia Emission in Finishing Swine." Journal of Animal Science 100, Supplement_2 (April 12, 2022): 165. http://dx.doi.org/10.1093/jas/skac064.281.

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Abstract Two independent studies were conducted to evaluate the effects of a commercially available phytogenic feed additive (essential oils blend and saponins) to reduce ammonia (NH3) emission in finishing swine. In each experiment, 72 barrows and gilts (Exp. 1: 30.7±3.35kg; Exp. 2: 26.2±1.85kg) were used during 110 and 77 d, respectively. In each experiment, pigs were housed in 8 gas-tight sealed chambers under controlled climatic conditions. Each chamber had three pens with a fully slatted floor. Pigs were allotted into 24 pens (3 pigs/pen). Treatments were assigned to the chambers (4 chambers/treatment). Dietary treatments were: 1) Control, and 2) Phytogenics (100g/MT AromexPro, Delacon Biotechnik GmbH). Diets were offered ad libitum and in mash form. Ammonia emissions were measured during the last 14 d of the experimental period of each study. Ammonia emissions were calculated per chamber as the experimental unit. Air NH3 concentration in the chambers was measured by a Photoacoustic Gas Monitor System INNOVA every 13 minutes. The ventilation rate of each chamber was used to calculate the emission rate. Data were analyzed using PROC MIXED of SAS. In Exp. 1, the phytogenics treatment significantly reduced by 19.5% the daily NH3 produced per animal, and by 20% the NH3 emission per kg body weight gained compared with the control treatment (12.94 vs. 16.07 g NH3/animal/day, P < 0.001 and 13.73 vs. 17.23 g NH3/kg BWG, P = 0.011). Similar findings were observed in Exp. 2, the phytogenic treatment significantly reduced by 19.8% the daily NH3 produced per animal and by 21% the NH3 emission per kg BWG compared with the control treatment (14.40 vs. 17.95 g NH3/animal/day, P = 0.01 and 13.58 vs. 17.18 g NH3/kg BWG, P = 0.01). In conclusion, the results suggest that the phytogenic feed additive used in the present studies can be implemented as a nutritional strategy to reduce NH3 emissions in finishing swine.

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Baláž, Richard, and Miloslav Bagoňa. "Physico-technical measurement of green roof in climate chamber module." Selected Scientific Papers - Journal of Civil Engineering 10, no. 1 (June 1, 2015): 91–98. http://dx.doi.org/10.1515/sspjce-2015-0010.

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Abstract Not for nothing it is said that "a good roof is priceless." Although it may lead to discussions, which roof is good, because there are a lot of requirements and criteria for the functional characterization. It must be understood that the roof structure defines the durability of the building as a unit, therefore it defines lifetime of other parts of the building and also the function of space that is covered by the roof. Therefore it is very important to pay particular attention to the design, as well as the realization of the roof structure. The aim of this publication is to judge the physical and technical parameters in the design of the roof coating module in a climatic chamber.

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Čech, Petr, and Daniela Tesařová. "Materials Used for the Production of Upholstered Furniture Like Source of Odors in Interior." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 62, no. 1 (2014): 39–52. http://dx.doi.org/10.11118/actaun201462010039.

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This paper investigates the problematic of VOC emissions and their assessment by olfactory methods. The main goal of this contribution is determine the odors emitted by upholstery fabrics used for upholstered furniture. This contribution researches the correlation between the results, which were obtained by the olfactory assessment and the results of the measurements of volatile organic compounds (VOCs) emitted by choose the kind of covering textiles. This research judged the influence of upholstery fabrics with different chemical composition (polyester, cotton and mixture of viscose and cotton) on olfactometric assessment. It was mainly focused on the determination of Hedonic tone and intensity of the odor. These olfactometric characteristics were determined using an equipment Sniffer 9000. Concurrently was also assessed the influence of climatic conditions in small space chamber on olfactometric assessment of tested materials. The climatic conditions differed mainly in terms of temperature and relative humidity in small space chamber. The results are compared with sensory perceptions and the qualitative and quantitative analysis of VOCs performed by using the gas chromatograph Agilent GC 6790 with mass spectrometer detector 5973. The experimental section shows that, the various types of criticized upholstery fabrics with different chemical composition emitted relatively low concentrations of VOC emissions. It was also demonstrated the influence of climatic conditions on VOC emissions and while on their olfactometric assessment. The tested materials of upholstery fabric showed very intensive olfactory sensation, which were described as very unpleasant (−4) in some cases.

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Stepanova, E. L., and P. V. Zharkov. "A study of the dependence between fuel consumption of a heat gas turbine and variation of heat loading of regional consumers having various climatic conditions taking into account determination of structural characteristics of heat exchanging equipment for grid water heating." Proceedings of Irkutsk State Technical University 25, no. 4 (September 1, 2021): 478–87. http://dx.doi.org/10.21285/1814-3520-2021-4-478-487.

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The aim was to optimize the dependence between fuel consumption and heat loading of regional consumers varied due to climatic conditions, taking into account the determination of structural characteristics of heat exchanging equipment for grid water heating in a heat gas turbine. A heat gas turbine comprising two fuel combustion chambers, a waste-heat boiler and a contact heat exchanger to heat makeup grid water was investigated. Scheme and parametric optimization studies were carried out using a mathematic model of a gas turbine created using a software and hardware system developed at the Department of Heat Power Systems of the Melentiev Energy Systems Institute, Siberian Branch of the Russian Academy of Sciences. Th turbine operating conditions differing in heat loads in four suggested operating regions were studied. It was found that an increase in fuel consumption in the second combustion chamber was 29%– 84% compared to that in the first combustion chamber. This rise was recorded when the turbine heat loading was increasing in the considered regions. Data analysis of the scheme and parametric optimization studies showed that, for operating conditions with a higher heat loading, it seems reasonable to ensure the maximum possible heating of makeup grid water as the loading rises. It is also recommended to slightly increase the heat surface area of the makeup grid water heater whose structural materials are less expensive than in a waste-heat boiler. It was shown that the suggested technical solution slightly increases specific capital investments while fully providing electrical and heat power to consumers. The obtained results can be used to select optimal technical solutions ensuring competitiveness in the operation of a heat gas turbine in regions with various climatic characteristics.

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Yu, Jia Jiang, and Sa Wu. "The Design of Temperature Control System in Climatic Chamber Based on PLC and PC." Applied Mechanics and Materials 148-149 (December 2011): 413–17. http://dx.doi.org/10.4028/www.scientific.net/amm.148-149.413.

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In allusion to climatic chamber which is the important device in reliability and environmental test, design a control system including S7-200 PLC and PC to realize conventional PID control. To obtain more precise test temperature goal, a setting of temperature tolerance belt is imported. And introduce SIMATIC S7-200 PLC communication protocol, design a PC human-machine interface based on VC++, use a ActiveX control named MSComm6.0 to realize data recording and control between PC and PLC.

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Di Giuseppe, Alessia, Alberto Maria Gambelli, Alberto Palliotti, Andrea Nicolini, and Federico Rossi. "Application of a completely organic and bio-degradable sugar-based insulating coating to vine shoots, to prevent late frost damages." E3S Web of Conferences 312 (2021): 12001. http://dx.doi.org/10.1051/e3sconf/202131212001.

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An innovative method against late frosts in vineyard has been developed at CIRIAF, University of Perugia. It consists of an organic coating made by cotton candy and straw to prevent the vine shoots freezing due to late frosts. This technique has already tested at lab-scale with very encouraging results. This paper aims to experiment the effect of the organic coating applied on young shoots of grapevine during artificially controlled frost events. A vine shoot covered by the organic coating was positioned in the climatic chamber and a thermocouple was rolled up to the vine shoot to control its temperature. Also, a vine shoot rolled up to the thermocouple and without organic coating was positioned inside the climatic chamber, used as a reference case. Results show that the temperature gap, gained with the adoption of the insulating layer was approximately in the range 0.2 – 3.2 °C, but the organic coating was not enough to maintain temperature above the ice-point able to prevent the vine shoot freezing in lab. Even thought, the experimental application of the present technique allowed to detect some crucial challenges which need to be solved before to test this technology in real situations.

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Mannes, David, Florian Schmid, Timon Wehmann, and Eberhard Lehmann. "Design and Applications of a Climatic Chamber for in-situ Neutron Imaging Experiments." Physics Procedia 88 (2017): 200–207. http://dx.doi.org/10.1016/j.phpro.2017.06.028.

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Ropret, Polonca, and Tadeja Kosec. "Raman investigation of artificial patinas on recent bronze – Part I: climatic chamber exposure." Journal of Raman Spectroscopy 43, no. 11 (September 18, 2012): 1578–86. http://dx.doi.org/10.1002/jrs.4068.

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