Submitted by Rafael Santana (rafael.silvasantana@ufpe.br) on 2017-07-12T18:01:48Z No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Aida Avendano_Dissertacao_Eng Mecanica_UFPE.pdf: 2879829 bytes, checksum: 90b10e461eb8407986cea09be582a591 (MD5) / Made available in DSpace on 2017-07-12T18:01:48Z (GMT). No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Aida Avendano_Dissertacao_Eng Mecanica_UFPE.pdf: 2879829 bytes, checksum: 90b10e461eb8407986cea09be582a591 (MD5) Previous issue date: 2016-01-29 / PRH-PB203 EQUIPAMENTOS/PETROBRAS / O processo de transferência de calor e massa dentro de um absorvedor tubular em espiral de Brometo de Lítio-Água (LiBr/H2O), resfriado com água em contracorrente, foi simulado usando um modelo matemático não linear. Para a simulação criou-se um programa em Matlab, usando o método numérico iterativo. Na calibração da malha física foram utilizadas condições de trabalho do absorvedor e o coeficiente de transferência de massa efetivo, Kef, obtidos da literatura. O coeficiente de transferência de calor global, U, foi calculado usando a resistência térmica global dentro do absorvedor. Para o cálculo do coeficiente de transferência de massa e de calor da interface solução-vapor se utilizaram correlações de analogia de transferência de calor e massa. As distribuições da temperatura e concentração da solução de LiBr/H2O, e a temperatura da água de resfriamento ao longo do comprimento do absorvedor foram determinadas utilizando o programa desenvolvido e os resultados obtidos apresentaram uma boa concordância quando comparados com dados reportados na literatura. Finalmente, foi analisada a influência da variação de alguns dos parâmetros, tais como temperatura e vazão de entrada da água de resfriamento, comprimento do absorvedor e material do tubo absorvedor dentro do absorvedor utilizando o programa desenvolvido. Os resultados obtidos mostraram que o programa desenvolvido permite predizer o comportamento do processo de transferência de massa e calor dentro do absorvedor em espiral de LiBr/H2O, além de representar uma ferramenta para o dimensionamento e/ou otimização deste componente. / The mass and heat transfer process in a spiral tubular absorber of the Water/Lithium Bromide (LiBr/H2O), cooled with in counter-current, was simulated using a nonlinear mathematical model. For the simulation was developed a program in Matlab, using the iterative numerical method. For the calibration of physical mesh were used absorber working condition and effective mass transfer coefficient, Kef, obtained from the literature. The global heat transfer coefficient, U, was calculated using the global thermal resistance within the absorber. For the calculation of the mass and heat transfer coefficient of the interface vapor-solution are used analogy correlations of mass and heat transfer. The temperature distribution and concentration of LiBr/H2O, and the cooling water temperature along of the length of the absorber were determined using the program developed, and the result obtained showed good agreement when compared to the data reported in the literature. Finally, the influence of the variation the some parameters were analyzed, such as inlet temperature and mass flow of cooling water, length of the absorber and material absorber tube within the absorber using the developed program. The result obtained showed that this program allowed to predict the behavior of the mass and heat transfer process in the absorber spiral of the LiBr/H2O, also represents a tool for the design and/or optimization of this component.

This dissertation focuses on the effects of heating on superhydrophobic (SHPo) surfaces. The work is divided into two main categories: heat transfer without mass transfer and heat transfer in conjunction with mass transfer. Numerical methods are used to explore the prior while experimental methods are utilized for the latter. The numerical work explores convective heat transfer in SHPo parallel plate microchannels and is separated into two stand-alone chapters that have been published archivally. The first considers surfaces with a rib/cavity structure and the second considers surfaces patterned with a square lattice of square posts. Laminar, fully developed, steady flow with constant fluid properties is considered where the tops of the ribs and posts are maintained at a constant heat flux boundary condition and the gas/liquid interfaces are assumed to be adiabatic. For both surface configurations the overall convective heat transfer is reduced. Results are presented in the form of average Nusselt number as well as apparent temperature jump length (thermal slip length). The heat transfer reduction is magnified by increasing cavity fraction, decreasing Peclet number, and decreasing channel size relative to the micro-structure spacing. Axial fluid conduction is found to be substantial at high Peclet numbers where it is classically neglected. The parameter regimes where prior analytical works found in the literature are valid are delineated. The experimental work is divided into two stand-alone chapters with one considering channel flow and the other a pool scenario. The channel work considers high aspect ratio microchannels with one heated SHPo wall. If water saturated with dissolved air is used, the air-filled cavities of SHPo surfaces act as nucleation sites for mass transfer. As the water heats it becomes supersaturated and air can effervesce onto the SHPo surface forming bubbles that align to the underlying micro-structure if the cavities are comprised of closed cells. The large bubbles increase drag in the channel and reduce heat transfer. Once the bubbles grow large enough, they are expelled from the channel and the nucleation and growth cycle begins again. The pool work considers submerged, heated SHPo surfaces such that the nucleation behavior can be explored in the absence of forced fluid flow. The surface is maintained at a constant temperature and a range of temperatures (40 - 90 °C) are explored. Similar nucleation behavior to that of the microchannels is observed, however, the bubbles are not expelled. Natural convection coefficients are computed. The surfaces with the greatest amount of nucleation show a significant reduction in convection coefficient, relative to a smooth hydrophilic surface, due to the insulating bubble layer.

A caractérisation de l’écoulement, du transfert de chaleur et de masse lors du déplacement de gouttelettes de diamètre inferieur au millimètre dans un milieu extérieur font l’objet de notre étude. La première partie présente l’état de l’art des connaissances théoriques et expérimentales des comportements aérodynamiques ainsi que les mécanismes de transfert thermiques et massiques intervenant entre une phase dispersée et une phase continue. La deuxième partie est consacrée à l’étude du phénomène d’évaporation d’une gouttelette mono-dispersée en chute libre dans l’air. Pour cela, nous avons réalisé un dispositif expérimental. Les mesures, nous permettent de prédire l’évaporation de la gouttelette en fonction des caractéristiques physico-chimiques et de l’hygrométrie du milieu extérieur. Pour la modélisation du transfert de chaleur et de masse nous avons utilisé un modèle simple qui tient en compte du couplage entre le mouvement et les phénomènes de transferts, validé dans une précédente étude au sein du laboratoire. Un bon accord est observé. La troisième partie traite de la simulation numérique de l’interaction entre les particules sphériques dans un régime laminaire. Tout d’abord, nous avons proposé et validé un modèle simple qui ne tient pas en compte des phénomènes d’interaction. Les résultats obtenus sont en concordance avec la littérature. Par la suite, nous avons étudié l’interaction entre trois particules identiques et co-alignées. Ce modèle tient compte de la nature de la particule, du nombre du Reynolds et de la distance de séparation. Nous avons validé ce travail par une comparaison avec une étude précédente que nous avons généralisé. La dernière partie est cernée sur l’étude de la dispersion des gouttelettes dans un écoulement turbulent homogène et isotrope. Pour cela, nous avons proposé un modèle Lagrangien de suivi des trajectoires. La production de la turbulence est assurée par une condition de turbulence de grille. Nous avons considéré que les caractéristiques moyennes de l’écoulement fluide sont connues. La sélection des fluctuations de vitesse turbulente est assurée par une méthode probabiliste gaussienne que nous avons développée. La fluctuation est conservée durant un certain temps lié à turbulence, elle est renouvelée au cours du calcul. Ce renouvellement est donné par le temps caractéristique de turbulence. / The characterization of flow, mass and heat transfer during moving droplets of diameter inferior to the millimetre makes the object of our study. In the first part, we present the theoretical and experimental knowledge. In the second part, we studied the evaporation of a free falling droplet in the air. In the third part, we make a simulation of the interaction between the spherical particles in laminar flow. This model takes into account the nature of the particle, the Reynolds number and the separation distance. In the last part, we study the dispersion of droplets in a homogeneous and isotropic turbulent flow.

Afin de réduire les effets nocifs des inclusions d'alumine et d'améliorer la coulabilité de l'acier en fusion, le traitement au calcium est largement utilisé pour transformer les inclusions solides en inclusions liquides. Cependant, le traitement au calcium donne des résultats très irréguliers, difficilement explicables. Même si de nombreux efforts ont été déployés pour comprendre le comportement du calcium dans l’acier liquide, il n’a pas encore été prédit avec précision. Par conséquent, le mécanisme par lequel le calcium se dissout dans la masse fondue et transforme les inclusions solides doit être compris pour optimiser les conditions de traitement tels que la vitesse d'injection, la profondeur d'injection, le diamètre du fil d'injection, le temps d'agitation, etc. Afin de comprendre le mécanisme par lequel le calcium se dissout dans l'acier liquide, des expériences en laboratoire ont été effectuées dans un petit four à induction d'une capacité de 2,5 kg de métal. L'objectif est de confronter les résultats expérimentaux avec les résultats du modèle numérique développé. La remontée des gouttelettes de calcium ou des bulles dans l’acier liquide est un problème à trois phases (gouttelettes ou bulles de calcium/acier liquide/air au sommet). Par conséquent, une plateforme de calcul scientifique interne (ICI-tech) basée sur des méthodes par éléments finis est adaptée pour permettre la modélisation de telles solutions. Les écoulements triphasiques sont validés à l’aide de références classiques issues de la littérature. Le modèle de dissolution a été mis en oeuvre dans notre logiciel et la validation du modèle de dissolution a été réalisée. Les gouttelettes et les bulles de calcium sont étudiées dans l’acier liquide et leur coefficient de transfert de masse moyen est indiqué. Afin d'étudier le changement de phase calcium liquide/gaz, un modèle de nucléation a été implémenté dans le code ICI-tech. Un test typique est effectué où la croissance d'une bulle (vapeur d'eau) dans une eau uniformément surchauffée et la croissance d'une bulle de calcium dans du calcium liquide uniformément surchauffé sont calculées. / In order to diminish the harmful effects of aluminate inclusions and improve the castability of molten steel, calcium treatment is widely used in Aluminum killed steels. However, calcium treatment gives irregular results. Even with many efforts done to understand the behavior of calcium in liquid steel, it is not yet accurately predicted. Therefore, the mechanism by which the calcium dissolves into the liquid steel and transforms the solid inclusions must be understood to optimize the process conditions such as injection speed, injection depth, injection wire diameter, stirring time, etc. In order to understand the mechanism by which the calcium dissolves into the liquid steel, laboratory scale experiments have been performed in a small induction furnace of 2.5 kg metal capacity. The calcium injections are performed at the temperature below and above the boiling point of calcium. Then, the corresponding yields (calcium recovery) are compared. Rise of calcium droplet or bubble in liquid steel is a three-phase problem (calcium droplet or calcium bubble/liquid steel/air at the top). Therefore, an in-house scientific computational platform (ICI-tech) based on finite element methods is adapted to allow the modeling of such three-phase flows, which is validated using the classical benchmark issued from the literature. The dissolution model has been implemented in our software, and their validation has been performed. Thereafter, the rise of Calcium droplets and bubbles are studied in the liquid steel, and their respective average mass transfer coefficient in the liquid steel is reported. In order to study the calcium liquid/gas phase change, the nucleation model has been implemented in the code (ICI-tech). A typical test is performed where the growth of a bubble (water vapor) in uniformly superheated water and growth of a calcium bubble in uniformly superheated Ca liquid is computed.

Der Bericht beschäftigt sich mit spontaner Grenzflächenkonvektion und -turbulenz beim Stoff- und Wärmeübergang an fluiden Phasengrenzen zwischen zwei nicht mischbaren Phasen. Solche Effekte sind von großer industrieller Bedeutung, da die erzielten Stoffübergangsraten um ein Vielfaches über den bei gewöhnlicher Diffusion auftretenden liegen. Zwei unterschiedliche Mechanismen sind der "Motor" für die Instabilitäten: Marangoni-Instabilität: Die Grenzflächenspannung ist eine Funktion der Temperatur und der Grenzflächenkonzentration des ausgetauschten Stoffes. Schwankungen der Temperatur und der Konzentration entlang der Phasengrenze führen folglich zu Grenzflächenspannungsgradienten. Grenzflächenspannungsgetriebene Instabilitäten äußern sich durch rollenförmige oder polygonale Konvektionszellen, Eruptionen oder Turbulenz an der Phasengrenze. Schwerkraftgetriebene Instabilität: Die Dichte ist ebenfalls eine Funktion der Temperatur und der Konzentration des gelösten Stoffes. Der Transport eines Stoffes über eine fluide Phasengrenze verändert die Zusammensetzung und die Dichte der angrenzenden Flüssigkeitsschichten, sodass instabile Dichteschichtungen auftreten können. Temperaturgradienten entstehen dabei durch Freisetzung von Reaktions- und/oder Lösungsenthalpie. Auftriebsbewegungen haben die Form von Thermiken (engl. plumes, thermals). Die Phänomene der Grenzflächenkonvektion werden in einer vertikalen Kapillarspaltgeometrie untersucht. Neben Stoffsystemen mit reaktivem Stoffübergang (Neutralisation von Karbonsäuren, Hydrolyse und Veresterung von Alkanoylhloriden) kamen auch solche mit reaktionsfreiem Stoffübergang (Karbonsäuren, Tensid) zur Anwendung. Die instabile Dichteschichtung, die durch den Konzentrationsgradienten infolge der Stoffdiffusion erzeugt wird, führt zu Auftriebskonvektion in Form von Thermiken. Die Anwesenheit einer exothermen Reaktion bewirkt eine Vergrößerung des Längenwachstums der Thermiken in der oberen Phase durch Aufprägung eines zusätzlich destabilisierenden Temperaturgradienten. In der unteren Phase kommt es dagegen zum Entstehen des doppeldiffusiven Fingerregimes bei Überlagerung des destabilisierenden Konzentrationsgradienten durch den stabilisierenden Temperaturgradienten. Beim Übergang eines Tensids konnten die für diese Stoffklasse charakteristischen Rollzellen, die durch Grenzflächenspannungsgradienten angetrieben werden, beobachtet werden. Diese Konvektionsstrukturen bleiben auf einen schmalen Bereich ober- und unterhalb der Phasengrenze beschränkt. Die Transportgleichungen für Impuls, Stoff und Wärme wurden in ihrer 2-dimensionalen Form in einen Rechenkode umgesetzt und der Übergang einer einzelnen Komponente simuliert. Die hydrodynamischen Bedingungen an der Phasengrenze wurden so formuliert, dass lokale Änderungen der Zusammensetzung und der Temperatur zu Grenzflächenspannungsgradienten führen und die Phasengrenze damit dem Marangonieffekt unterliegt. Die Stoffeigenschaften wurden mit Ausnahme der Dichte im Volumenkraftterm der Impulsgleichung als konstant angenommen, sodass dichtegetriebene Konvektionen simuliert werden können. Die verschiedenen Konvektionsformen werden durch die Simulation qualitativ gut wiedergegeben. Bei Marangonikonvektion kommt es zu einer Verschiebung des steilen Konzentrationsgradienten von der Phasengrenze in die Kerne der Phasen, was zum schnellen Absterben der Marangonikonvektion führt. Die Wiedergabe des Längenwachstums der Thermiken durch Simulation eines realen Stoffsystems ist zufriedenstellend. Ebenso gibt die Simulation eine realistische Abschätzung zu erwartender Stoffströme bei Anwesenheit hydrodynamischer Instabilitäten. Größere Abweichungen zwischen Simulation und Experiment sind jedoch bei der horizontalen Größenskala der Fingerstruktur festzustellen, die wahrscheinlich auf die Boussinesq-Approximation zurückzuführen sind.

The limiting current technique has widely been used to study liquid-solid mass transfer in various reactor configurations. In the present contribution several underlying physical aspects have been investigated in order to improve the design of mass transfer experiments. Experimentally, the significant influence of electrolyte composition and hydrodynamic conditions have been studied and quantified to ensure conditions of high reproducibility. In the course of single phase COMSOL simulations, different electrode configurations have been examined with emphasis on concentration fields and electric current distribution showing a large sensitivity of the experimental configuration on the absolute current values.

This dissertation presents the development of two unique measurement platforms. <br><br>The first system is a high-temperature Z-Meter. This system is designed to simultaneously measure the electrical resistivity, Seebeck coefficient, and thermal conductivity of a thermoelectric sample to accurately determine the figure of merit, ZT, for that material. It is designed to operated at sample temperatures of up to 1000C, and with temperature gradients on the order of 500C across the sample. This system also provides <i>in situ</i> load monitoring for contact pressure and allows the user to adjust loading during the experiment. <br><br>The second part of this dissertation focuses on the development of enhanced composite phase change material (PCM) heat sinks to improve passive thermal management in mobile electronics. We present a new design for a composite PCM heat sink and utilize off-the-shelf PCMs to show characterize the performance. In order to accurately investigate the performance enhancement of these designs, we develop a turn-key thermal management evaluation platform to allow the user complete control over the power profiles and cycling applied to the test chip, as well as providing <i>in situ</i> temperature monitoring within the chip. The proposed package designs show significant improvement in the length of time extended before reaching the cut-off temperature within the heatfluxes tested, 6 - 14 W/cm^2, and accomplish this while weighing less than the equivalent sensible heat storage design.<br><br><br><br>

The influence of operation parameters on the drying of spherical porous particles containing a mixture of solvents evaporating into nitrogen in a continuously worked vibrated fluid-bed dryer was studied. A simulation based on the analytical solution to heat and mass transfer equations was applied and modifications were suggested.   Four different ternary liquid mixtures were selected: Acetone-Chloroform-Methanol (ACM), Ethanol- 2-propanol-Water (EIpW), Water-Ethanol-Ethyl Acetate (WEEa) and Ethanol-Methylethylketone- Toluene (EMekT). For the solid, physical properties of Pyrex was used.   Comparison of composition- and temperature- profiles indicated that there is no resistance against heat transfer within the solid and that the heat transfer is much faster than mass transfer.   Selectivity diagrams were drawn. The results indicated that selectivity is an important parameter in predicting the drying behavior.   The retention ratio was studied as performance parameter. Its variation was studied in response to changes in operation parameters, including gas velocity and temperature, as well as solid temperature and particle size.   A  modification  to  the  model  was  examined  by  assuming  a  liquid-content-dependent  diffusion resistance factor. It was observed that implementing such an assumption yields decreased values for retention ratios.   The  effect  of  vibration  on  heat  and  mass  transfer  coefficients  was  included  using  a  correlation suggested by Sbrodov and the resulting effect on retention ratio was examined. / Inverkan   av   driftparameter  på  torkning  av   sfäriska  porösa  partiklar  som   innehåller lösningsmedelblandningar som avdunstar i kväve i en kontinuerligt viberande fluidbädd-tork studerades.  En  simuleringsmodell  baserad  på  den  analytiska  lösningen  till  värme-  och materieöverföringsekvationerna användes och ändringar föreslogs.   Fyra  olika  tärnar  vätskeblandningar  valdes:  aceton-kloroform-metanol(ACM),  etanol-2- propanolvatten,(EIpW),     vatten-etanol-etylacetat     (WEEa)     och     etanol-metyletylketon- toluen(EMekT). För den fasta fasen användes fysikaliska egenskaper liknande Pyrex.   Sammansättnings-  och  temperatur-profiler  visade  att  det  inte  finns  något  motstånd  mot värmeöverföring  i  den  fasta  fasen  och  att  värmeöverföringen  sker  mycket  snabbare  än materieöverförningen.   Selektivitetsdiagram ritades. Resultaten indikerar att selektivititen är en viktig parmeter för att förutsäga beteendet vid torkning.   Retentionsförhållandet  användes  som  ett  prestandamått.  Dess  variation  med  avseende  på förändringar av  driftsparmetrar,  bland  annat  gasen  hastighet  och  temperatur  samt  den  fasta  fasens temperatur och partikelstorlek, studerades.   En modifiering av modellen undersöktes genom att införa en vätskehalts-beroende faktor för diffusionsmotståndet. Detta minskade värdena på retentionsförhållandena.   Vibrationens inverkan på värme- och materieöverföring infördes genom att använda Sbrodov samband, och den resulterande effekten på retentionsförhållandet observerades.

<p>Secondary cooling during continuous casting is a delicate process because the cooling rate of water spray directly affects the slab surface and internal quality. Undercooling may lead to slab surface bulging or even breakout, whereas overcooling can cause deformation and crack of slabs due to excessive thermal residual stresses and strains. Any slab which does not meet the required quality will be downgraded or scrapped and remelted. In order to remain competitive and continuously produce high-quality and high-strength steel at the maximum production rate, the secondary cooling process must be carefully designed and controlled. Efficient and uniform heat removal without deforming or crack the slab is a significant challenge during secondary cooling. In the meantime, the on-site thermal measurement techniques are limited due to the harsh environment. In contrast, experimental measurements are only valid for the tested conditions, and the measurement process is not only labor-intensive, but the result might be inapplicable when changes in the process occur. On the other hand, the high-performance computing (HPC)-powered computational fluid dynamics (CFD) approach has become a powerful tool to gain insights into complex fluid flow and heat transfer problems. Yet, few successful numerical models for heat transfer phenomena during secondary cooling have been reported, primarily due to complex phenomena. </p> <p> </p> <p>Therefore, the current study has proposed two three-dimensional continuum numerical models and a three-step coupling procedure for the transport of mass, momentum, and energy during the secondary cooling process. The first numerical model features the simulation of water spray impingement heat and mass transfer on the surface of a moving slab considering atomization, droplet dispersion, droplet-air interaction, droplet-droplet interaction, droplet-wall impingement, the effect of vapor film, and droplet boiling. The model has been validated against five benchmark experiments in terms of droplet size prior to impingement, droplet impingement pressure, and heat transfer coefficient (HTC) on the slab surface. The validated model has been applied to a series of numerical simulations to investigate the effects of spray nozzle type, spray flow rate, standoff distance, spray direction, casting speed, nozzle-to-nozzle distance, row-to-row distance, arrangement of nozzles, roll and roll pitch, spray angle, spray water temperature, slab surface temperature, and spray cooling on the narrow face. Furthermore, the simulation results have been used to generate a mathematically simple HTC correlation, expressed as a function of nine essential operating parameters. A graphic user interface (GUI) has been developed to facilitate the application of correlations. The calculated two-dimensional HTC distribution is stored in the universal comma-separated values (csv) format, and it can be directly applied as a boundary condition to on-site off-line/on-line solidification calculation at steel mills. The proposed numerical model and the generic methodology for HTC correlations should benefit the steel industry by expediting the development process of HTC correlations, achieving real-time dynamic spray cooling control, supporting nozzle selection, troubleshooting malfunctioning nozzles, and can further improve the accuracy of the existing casting control systems.</p> <p> </p> <p>In the second numerical model, the volume-averaged Enthalpy-Porosity method has been extended to include the slurry effect at low solid fractions through a switching function. With the HTC distribution on the slab surface as the thermal boundary condition, the model has been used to investigate the fluid flow, heat transfer, and solidification inside a slab during the secondary cooling process. The model has been validated against the analytical solution for a stationary thin solidifying body and the simulation for a moving thin solidifying body. The effects of secondary dendrite arm spacing, critical solid fraction, crystal constant, switching function constant, cooling rate, rolls, nozzle-to-nozzle distance, and arrangement of nozzles have been evaluated using the validated model. In addition, <a>the solidification model has been coupled with the predictions from the HTC correlations, and the results have demonstrated the availability of the correlations other than on-site continuous casting control. </a>Moreover, the model, along with the three-step coupling procedure, has been applied to simulate the initial solidification process in continuous casting, where a sufficient cooling rate is required to maintain a proper solidification rate. Otherwise, bulging or breakout might occur. The prediction is in good agreement with the measured shell thickness, which was obtained from a breakout incident. With the help of HPC, such comprehensive simulations will continue to serve as a powerful tool for troubleshooting and optimization.</p>

<p> As space exploration continues to advance, so does the drive to inhabit celestial bodies. In<br> order to expand our civilization to the Moon or even other planets requires an enormous amount of research and development. The Resilient Extra-Terrestrial Habitat Institute is a NASA funded project that aims to develop the technology needed to establish deep-space habitats. Deep-space inhabitation poses many challenges that are not present here on earth. The Moon, for example, has temperatures that range from -233−123°C. Aside from the extreme temperatures, a variety of thermal loads will need to be handled by the Environmental Control and Life Support System (ECLSS). Aside from the research and architecture of the International Space Station’s ECLSS, very little information is known about disturbances related to the thermal management of extra- terrestrial habitats.<br> </p> <p>RETHi is developing a Cyber-Physical Testbed (CPT) that represents a one-fifth scale<br> prototype of a deep space habitat. In order to answer difficult research questions regarding ECLSS and thermal management of a deep-space habitat, a heat pump was modeled and validated with the physical part of the CPT. Once validated, the heat pump model is able to accurately predict the steady state behavior given the indoor and outdoor conditions of the testbed. When coupled with the interior environment (IE) model, it gives insight into the system’s requirements and response. Experimental testing was conducted with the heat pump in order to validate the model. After the model was validated, a series of parametric studies were conducted in order to investigate the effects of varying thermal loads and dehumidification. Since the groundwork was laid through model development and experimentation, future work consists of designing a more versatile heat pump to test a variety of disturbance scenarios. Although the heat pump model is specifically designed for the CPT, it proves to be versatile for other closed and pressurized environments such as aircraft and clean rooms according to the analysis of dehumidification and dependence on pressure. </p>