Paraffin Wax Lab Report
Abstract:
In many air-conditioning restaurants or hotels, foods are served to the customers in small vessels, which maintain the heat of the food only for few minutes. Under such circumstances, the use of latent heat storage system using phase change material is an effective way of storing thermal energy. A heat storage member including an encapsulated of phase change material is disposed in the cavity. An electric tube heater is positioned in the middle bowl to reach the melting point of phase change material in very fast manner. The phase change material cools when the vessel is kept idle or in use it undergoes a phase change from the liquid state to the solid state and transfers the heat to the bowl. In the present invention, a paraffin
…show more content…
Heat transfer calculations:
Selection of PCM: The PCM material should be selected considering the application and the working. A paraffin wax is selected as the storage material due to its good specific heat capacity and high latent heat of fusion.
1. Density of the paraffin wax (ρ) = 900 kg/m3
2. Specific heat of the paraffin wax (Cp₁) = 2.14 kJ/kg K
3. Paraffin wax melting temperature (T₁) = 60°C
4. Latent heat of melting (H) = 190 kJ/kg Specifications:
1. Room temperature (T₂) = 20°C
2. Heat transfer coefficient (h) = 5 W/ (m2K)
3. Specific heat of the water (Cp₂) = 4.186 kJ/kg K
4. Diameter of the middle vessel (D) = 160 mm
5. Mass of the PCM consumed (m) = 250g
6. Quantity of water = 300ml
7. Food quantity = 300g
A = πr2 = 3.14 x (0.08)2 = 0.02 m2 dT = T₁ - T₂ = 60 – 20 = 40 °C
Maximum allowable volume of the PCM, V = (2/3) π (R3 – r3) = (2/3) π (0.1403 – 0.1203) = 0.0021 m3
Maximum allowable mass of the PCM, M = ρ* V = 1.68 kg. Heat transfer rate, Q = h A dT = 5 x 0.02 x 40 = 4W = 4 J/s
Heat transfer rate per hour, Q = 4 x
Millsaps College Lab Manual
1232 Words | 5 PagesAfter the water temperature began to stabilize, the highest constant temperature was recorded. This data was used to calculate the calorimeter constant. This enter procedure was repeated to calculate another calorimeter constant in order to find the average of both answers. After that value was calculated, a 600 mL beaker was filled with 300 mL of water and heated till it started boiling. An unknown metal located on the instructor's bench was obtained and the mass was calculated.
Ap Chemistry Semester 1 Final Review Paper
810 Words | 4 PagesUse the following data to find the energy change in J of each system Specific heat of ice= 2.03 J/gC Specific heat of steam= 1.99 J/gC Specific heat of water= 4.18
How Does The Lock Bag Experiment Demonstrate The Law Of Conservation Of Mass?
939 Words | 4 PagesThe beginning temperature of the substances used was between 21∘C and 22∘C. By 90 seconds into the experiment the temperature was at 72∘C. Immediately after 90 seconds the experiment had ended because then the temperature of the mixed substance was decreasing to go back to room temperature where it started. The final temperature that my group took was 33∘C at 8 minutes and 12 seconds.
Erlenmeyer Lab
404 Words | 2 PagesUsing the thermometer, the temperature was measured and recorded. Then, the 25-mL graduated cylinder was filled with 25 mL of distilled water, and its mass was measured and recorded. The density of the water was found using the temperature and the Density of water index. Moreover, the calculated volume of water was calculated using the formula of density, and the difference between observed volume and calculated volume was found. This process was then repeated using the 50-mL beaker and the results were recorded.
Lab Report
1244 Words | 5 PagesST Report In the experiment, the problem was the contaminants that were affecting the quality of the water samples. To fix this issue, three scientists had to determine the contaminants that were present in the samples. One sample was from the school sink and the second sample was from an unknown source. The scientists conducted many tests to figure out what pollutants were present in the water.
Cyclohexane Lab Report
1022 Words | 5 PagesApproximately 12 mL of cyclohexane was put into a test tube and measured to be 9.09g. The test tube was placed in the ice bath and the temperature was measured with a thermometer in intervals of two seconds. The recording stopped once the stirring rod could not move anymore and the temperature was constant for 10
Magnesium Sulfate Heptahydrate Lab Report
478 Words | 2 PagesThis heating and cooling was repeated until there was very little (less than 0.0010 grams) fluctuation in numbers. Vial one had a start weight of 14.7681 and an end weight of 15.4098, meaning the mass of the water was 0.4658. Vial 2 had a start weight of 14.7451 and an end weight of 15.3833, meaning the mass of the water in this sample was 0.4633. The mass of the water was found by subtracting the mass of the vial with the hydrate (the start weight) from the mass after the final heating (the final weight). To then find the percent water divide the water mass by the hydrate mass and multiply by 100 since the number is a percent.
Gummy Bear Lab Report
489 Words | 2 PagesIn our gummy bear lab experiment, we experienced osmosis, the water version of diffusion. My lab partner, Maggie, and I were given two yellow gummy bears. The first one measured at 10 mm in both thickness and width, and 21 mm in height. The approximate volume was 2,100 mm^3, and the mass was 2.567 grams. The second one was 11 mm in thickness, 9 mm in width, and 20 mm in height.
Alka Seltzer Lab Report
802 Words | 4 PagesMaterials: The materials that I will be utilizing during these experimentations are three to four ice cubes, one cup for measuring, six unblemished cups, one stopwatch, one hot water source, three tablets of Alka-Seltzer, one thermometer that measures from negative
Hand Warm Lab Report
289 Words | 2 PagesOur objective was to pick the best chemical to be used in a hand warm. This chemical had to be cheap, relatively safe, and must raise the temperature by 20oC and no more. We add 6 different chemicals to water we record the inshell temperature and then add one a the 6 chemicals to the water and record the temperature change of the water. We also add cold water hot water together to find how much heat would escape the calorimeter. We found that the calorimeter absorbed 71.1J/oC. Then this information to calculate the energy that was released by all of the chemical reaction.
How Fast Does Alka Seltzer Make Gas
621 Words | 3 PagesThe control in the experiment is water. Units used while timing the productivity of gas from an Alka-Seltzer tablet in different temperatures is, seconds. In order to find out if temperature controls the rate of chemical reaction, whether hot water is a more effective way to make the gas produce at a faster speed, it would be necessary to compare the results of different temperatures at the end of each trial. In order to do this the scientists will measure the volume of gas that is produced within a 10 second interval time after the tablet begins to react.
6.03 Calorimetry Lab
848 Words | 4 Pages37.8 °C and 36.3 °C 30-40 °C 3. 41.7 °C and 40.2 ° C 40-50 °C 4. 50 °C and 48 ° C 50-60 °C Average temperatures: (37.8+36.3)/2=37.05 °C (41.7+40.2)/2=40.95 °C (50+48)/2=49 °C Table 1 -The values of experiment Temperature (°C) Density (kg/m3) 26.5 995 37.05 992.5 40.95 991 49 990 70 984.856 80 982.524 90 980.272 100 977.93 Table 2. The values in steam table Temperature (°C) Density (kg/m3)
Cognitive Properties Of An Unknown Lab Report
976 Words | 4 PagesThe mass of an 11 dram vial was taken before and after it was filled with 15 mL of distilled water, resulting in a mass of 29.9667 grams without the distilled water and 44.7771 grams with the distilled water. The looped wire was inserted into the 11 dram vial, to be used for stirring. The 11 dram vial was then submerged into the ice bath, and the Vernier temperature probe was immersed into the 11 dram vial. Once the temperature of the distilled water reached 10°C, the temperature was recorded every 10 seconds. After the data was collected, the 11 dram vial was brought back to room temperature.
Gummy Bear Lab Report
342 Words | 2 PagesIn this experiment three gummy bears were put in different solutions to observe the effect of osmosis on them. The independent variable in this situation are the following types of water: tap, salt, and sugar. The dependent variable is the change in mass and volume from all three gummy bears. The gummy bear brand, the environment, and the amount of time in the solution are the constants of the experiment. After the experiment is competed, one can determine how the osmosis changes the gummy bears.
Enthalpy Of Neutralization Lab Report
1054 Words | 5 Pagesn=cV n=1.00 mol dm^(-3)×(25 dm^3±0.16%)/1000=0.025 mol±0.16 % The enthalpy of neutralization is then calculated. ∆H=(-1356.5 J±3.104% )/(0.025 mol±0.16%)=-54260 J 〖mol〗^(-1)±3.3 % ∆H=-54260 J m〖ol〗^(-1)±3.3%÷1000=-54 kJ 〖mol〗^(-1)±3.3 %
More about Paraffin Wax Lab Report
Millsaps College Lab Manual
1232 Words | 5 PagesAp Chemistry Semester 1 Final Review Paper
810 Words | 4 PagesHow Does The Lock Bag Experiment Demonstrate The Law Of Conservation Of Mass?
939 Words | 4 PagesErlenmeyer Lab
404 Words | 2 PagesLab Report
1244 Words | 5 PagesCyclohexane Lab Report
1022 Words | 5 PagesMagnesium Sulfate Heptahydrate Lab Report
478 Words | 2 PagesGummy Bear Lab Report
489 Words | 2 PagesAlka Seltzer Lab Report
802 Words | 4 PagesHand Warm Lab Report
289 Words | 2 PagesHow Fast Does Alka Seltzer Make Gas
621 Words | 3 Pages6.03 Calorimetry Lab
848 Words | 4 PagesCognitive Properties Of An Unknown Lab Report
976 Words | 4 PagesGummy Bear Lab Report
342 Words | 2 PagesEnthalpy Of Neutralization Lab Report
1054 Words | 5 Pages