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Ventilator clinical vignette
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CHAPTER 3 METHODOLOGY OF EXPERIMENT
3.1 Experiment Preparation
There are three main steps in preparing the experiment, which are a) experiment principle & design; b) calibration of resistance temperature detectors (RTDs) and thermocouples (TCs) and c) Set up of equipment.
3.1.1 Experiment Principle and Design
In laboratory experiment, two open-ended parallel plates are used to mimic the double skin roof. For downward heat flow’s case, the upper plate is heated to a constant high temperature, and the lower plate is exposed to indoor environment. The length and width of the parallel plates are .The parallel plates are adjusted to varying the inclinations of ѳ=15º, 30º, 45º and different cavity heights of 3cm, 6cm, 9cm.
After achieving a steady-state in each case, measurements are taken to record the roof surface temperatures, ventilated air flow rate, air temperature at the inlet, in the middle, and at the outlet of the cavity which are illustrated in Figure 3.1.
Figure 3.1: Sketch of the experimental setup
3.1.2 Calibration of Thermocouples and RTDs
The calibration temperatures are 25º, 35º, 45º, 55º and 65ºC (Range of 25ºC to65ºC with the increments of 10ºC). The table below has showed the linearity of recorded temperature with respect to the text probe’s temporary. (Appendix 1)
Table 3.1.1: Calibration of RTD-B1
Figure 3.2.1: Graph of RTD-B1
Table 3.2.1: Calibration of TC-1
Figure 3.2.2: Graph of TC-1
As shown in the above table, the temperature readings are verified by plotting a linear graph for each sensor respectively. The graphs can help to check any errors from the sensors by looking at faulty points which would be plotted beyond the linearity of the graph. If a sensor is consistent in its read...
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...g components for industrial production, PhD. Thesis, Ecole Nationale Superieure des Mines de Pairs, 2000.
[6]. CSTB, Determination of the thermal performance of a roof ventilation system(in French), E-01-0005, Grenoble,2002.
[7]. http://arxiv.org/ftp/arxiv/papers/1312/1312.1295.pdf.
[8]. P.-C. CHANG et al., Development and preliminary evaluation of double roof prototypes incorporating RBS (radiant barrier system), Energy & Building (2007).
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The purpose of this lab was to calculate the specific heat of a metal cylinder
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9. Repeat step #8. Using a pipet, add small amounts of boiling water from the hot plate to the water bath and collect pressure and temperature data. For each new temperature, record the air pressure and vapor pressure. Continue until you have gathered 6 measurements that range from room temperature to 40 °C.
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= I have decided to produce a step-by-step guide for each experiment. just to ensure that when we actually come to conducting the practical work, it runs flawlessly. This will also help us conduct fairer tests. as we will be following the same set of steps each time we collect a result.
had an absolute error in the slope of only 0.0007 s/°C and the absolute error in the intercept of
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A discussion on the HVAC heat loss calculations and miscellaneous supports. It was explained that the drawings showed an estimated tonnage, but the bidders were to size their units per their own calculations. The dual HVAC units as shown on the drawings represent N+1 redundancy as large VFDs are part of the building
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Then, repeat steps 7-11 another 4 times but with the room temperature water. For the room temperature water just leave it in the room but try not to change the room’s temperature. 15. Try to put all your recorded data into a table for organization 16. Repeat the entire experiment for more reliable data.
- Temperature was measured after and exact time i.e. 1 minute, 2 minutes, 3 minutes.
Castleton and Davison, (2010) explains that intensive green roofs have a shallow substrate layer that tolerate deeper rooting plants, so that the trees and shrubs can remain alive. They are usually accessible and need regular maintenance such as extensive irrigation and fertilising. This type of roofs is generally thicker and can support a wider selection of plants and generally they are heavier systems, but therefore it has the highest demand on building structures. Fioretti and Palla, (2010) suggest that Intensive roofs are considered to be expensive to maintain and to build.
Some other use of solar energy after that was the solar roof and the solar