In this research, a new analytical solution of one dimensional coupled equations of moisture and heat transfer in capillary-porous body is presented. These equations are known as the Luikov system of equations. These partial differential equations are coupled and nonhomogenous, which is assumed linearly with the assumption that the coefficients of the equations are independent of space, time, and every dependent variables.In innovative method of this survey, considering the governing equations are coupled, at first , assuming that the independent equations system from each other (removal coupling), it has been resulted a public answer for equations by using the method of separation of variables. Next, the private answers will be gotten by considering coupled equations and using laplace transform method, in this survey it has been searched the effect of dimensionless coefficients such as Lu, Fo, ε concluding on the rate of heat and moisture transfer. The outcome shows the effect of Luikov number on the rate of heat and moisture transfer of capillary-porous body equations coupling. It has also been resulted the depending of phase change coefficient and this outcome has been planned in the surveys by Luikov

This paper presents a two-dimensional numerical analysis of an evaporative drying process of the porous bodies in a row, considering effects of configuration on heat and mass transfer in assembly. Drying process simulation of three rectangular porous material subject to forced convection, was carried out by employing N-S, energy and concentration equations for external air flow; along with moisture conservation and energy equations for the porous zone. Numerical predictions indicate that the first porous body encountered with flow dries faster in comparison to the others, while for next bodies average moisture contents are approximately equal in all the drying time. Moreover, it was observed that for the first body, both of top surface and opposite surface to the flow direction have equal importance in heat and mass transfer; while top surface of next bodies, have major role in drying process. Also moisture and temperature profiles of the first body have shown essential difference with the other objects. It can be concluded that no significant change in heat and mass transfer and drying rate will be achieved through the change in distance between porous bodies.

Up to now، lots of thermal comfort models have been introduced to predict human being’s body thermal response to the changes in personal and environmental conditions. Among them، Gagge’s model because of its ability in estimating body physiological responses and thermal sensation in transient conditions has turned to one of the most used thermal comfort models. Although، this model uses transient mechanisms to determine body core and skin temperatures، but yet، simplified assumptions including steady heat and moisture transfer through clothing and disregarding thermal and mass inertia in the clothing is used in its structure. This study، by investigating various mechanisms of heat and moisture transfer in the clothing (steady heat and mass transfer، transient heat transfer-steady mass transfer، transient heat transfer-semi transient mass transfer) tries to compare upcoming results of these models with those of experiments. It was declared that considering transient heat transfer along with semi transient mass transfer in the clothing have positive effects on the results.

Turbinates play an important role in conditioning of inhaled air and affect the air flow passing the nasal cavity. The purpose of this study is to investigate the effect of removing inferior turbinate on flow field, heat and moisture transfer from mucosa into the inhaled-air in a human nasal cavity and comparison of them before and after the surgery. Turbinectomy was performed virtually on the computational model under the specialist’s supervision. In this study the airflow assumed to be laminar and unsteady. The nasal wall assumed to be rigid and no slip boundary condition was set. Moreover, the mucous layer assumed to be within fixed thickness in all over nasal cavity surface. The temperature and humidity distribution over the surface of mucusa are found by numerical computation. The results depict that conditioning of the nasal airway deteriorates by removing the inferior turbinate. For a specific air flow rate, both the heat and moisture flux averages decrease after surgery.

To investigate the effect of relative humidity percentage on heat transfer and distribution of droplets in the condensation phenomenon, a test device with the ability to provide and control different environmental conditions was made, and therefore, the hydrophilic (copper) and hydrophobic (Teflon coating on copper) surfaces were measured under controlled environmental conditions. In all the tests, the inlet air flow rate, inlet air temperature, air temperature reaching the test surface, water temperature, water surface height, and test surface temperature were kept constant at specific values using PID control. Each test's relative humidity values of 80, 88, and 96% have been determined and controlled. The results of the transient investigation of heat transfer show that it takes time for the condensation phenomenon to occur, and the higher the surface hydrophilicity and relative humidity, the shorter this time will be. Also, the average heat transfer for 60 minutes was calculated. It showed that the average heat transfer coefficient increases with increasing humidity. Under the same environmental conditions, the heat transfer coefficient on hydrophilic surfaces is higher than on hydrophobic ones. In the graphical analysis of the droplet size, it has been observed that the most oversized droplets on hydrophilic surfaces at relative humidities of 88 and 96% are in the hydraulic diameter range of 0.35 to 0.4, and on hydrophobic surfaces are at relative humidities of 80 and 88% in the hydraulic diameter range of 0.2 to 0.25 mm.

In the present study, the heat transfer, moisture distribution, air flow and thermal comfort in a residual room which is warmed by convectional thermal panels under different environmental conditions was assessed numerically. The analyzed model is the real and dynamic 3D simulation, and a virtual thermal manikin with real physiological dimensions has been added to the model. The manikin is standing at the center of room. The room has dimensions of 3*4*4 m with an inlet device that has dimensions of 1.28*0.054 2 m and two outlet devices with dimensions of 0.054*1.02 2 m . The inlet and outlet devices have been modeled above and under the door. To determine the optimal arrangement and number of panels, three models have been studied. The models include one panel with real dimensions of 1.242*0.81 2 m , two panels with real dimensions 0.61*0.962 m and three panels with real dimensions 0.61*0.81 2 m , with a thickness of 20cm in all panels. The uniform distribution of temperature, velocity and moisture, and proper and symmetric arrangement of panels, inlets and outlets decrease the energy consumption and satisfy the thermal comfort of inhabitants. Thermal loss increases due to the panels under the window. It was concluded that using two panels with smaller dimensions at the left and right of the model instead of one panel under the window or three panels at the left, right and under the window significantly reduces the thermal loss.

Hot air drying is the most common method used to dry agricultural products; this method is time consuming and has high energy consumption. Also, due to the rapid drying of the product surface in this method, the distribution and transferring of heat and moisture inside the product is relatively uneven. In fruits, such as apricots, skin of the fruit has a controlling and inhibitory effect on the drying process. Therefore, using some combination methods to dry fruits such as apricots, can reduce drying time and energy consumption. In the present study, a convection dryer was equipped with an infrared radiation system. The effect of hot air and infrared combination in different strategies on apricot drying was evaluated and compared. Experiments were conducted with hot air and infrared treatments alone, simultaneously and in a combination of two-stage and intermittent infrared in a combined dryer on a laboratory scale. The hot air temperature was 65 ° C, the velocity of hot air was 1.5 m/s and the power of infrared lamps was 400 watts. The results showed that the drying time, energy consumption and effective moisture penetration coefficient were significantly affected by the treatments. Midili et al.'s model was able to describe well the drying behavior of apricots for all the different combination states under investigation.