Since each material has different thermal conductivity, heat transferred through each of them is different.
This apparatus has a tank with a heater inside to heat water to a specified temperature. The temperature setting is adjusted at the thermostat on the Heat transfer lab panel.
Once the water is heated to the desired temperature it is transferred by a water pump next to the tank. On the pump there is a knob which varies the pump pressure. The hot water is pumped through a pipe to an insulated tube for which heat will be exchanged.
The actual heat exchange takes place in the insulated tubing for which cold water flows concentricity around the hot water tube in two different flow arrangements. These two arrangements, parallel and counter flow, can be changed by opening and closing certain valves within the network of hot and cold water tubing.
Each flow arrangement is shown on a diagram located on the front panel. It is worthwhile to note that the temperature at cold-in changes to temperature at cold-out when a counter flow arrangement is used. The same situation applies to the temperature at cold-out, which changes to temperature cold-in for the counter flow.
The other readings remain the same. The flow rates can be adjusted for both cold and hot water by turning the valve knobs on the right side of the panel. Thermometers are located at the inlet, exit and middle of the insulated heat exchanger tubing for both hot and cold water.
To start the heat exchanger turn on the power switch and set the temperature controller to the desired temperature oC. Turn off both of the control valves to allow the holding tank to heat without losing heat through the exchanger.
Turn on the cold water at the faucet. Bleeding of the system can be accomplished by the valves located near the temperature mid thermometers. Slowly turn the valve until all the air is out.
Do this for both of the valves. First, set the following initial conditions: After conditions have stabilized, read the hot and cold temperatures at inlet, mid-point, and outlet. Set the apparatus up for counter flow as seen on the apparatus panel and repeat the other steps from 2.
Calculate the power emitted, power absorbed, power lost, log mean temperature difference, overall heat transfer coefficient, and the efficiency. For heat exchanger specifications see the panel located on the apparatus.
Plot the temperature distributions similar to Figure 1. Compare and comment on the two types of flow. Schematic of temperature distributions for concentric heat exchanger.Dec 13, · These are two lab demos that Mr.
Becker does in his science classroom at Oil City Middle School to show how heat transfers from an area from greater concentration to . Heat causes the molecules of matter to vibrate faster, which is recorded as temperature.
With the Heat Transfer Kit, two insulated containers (called calorimeters), thermometers, and an aluminum transfer bar make it possible to study the transfer of heat from a substance in one calorimeter to .
Our work: We focus on experimental and numerical studies of heat transfer.A major focus area is on porous media, such as packed beds used in Thermal Energy Storage.
Our studies range from the microscale (e.g.
pore scale analysis) to the macroscale (e.g. lab scale analysis). In this 3-day activity students will perform a pre-lab and discussion first day. On day two students will cycle through 5 lab stations and draw, label, and explain what is occurring there using convection, conduction, and radiation.
LMTD of heat exchanger in counter flow = «««««««««««Effectiveness of the equipment in counter flow = ««««««««««.5 mm = Heat Transferred in the initiativeblog.com TRANSFER LAB Qh=MhCph (Thi-Tho) Heat gained by cold water-Qc Mc = ««««Kg/sec Qc = McCpc(Tco-Tci) T max = Thi-Tco = T min = Tho-Tci = Area of pipe with diameter /5(2).
Lab Instructor: Muhammad Jasim Course Number: MCE , MCE L Our Heat Transfer Laboratory caters to both mechanical and chemical engineering courses that deal with problems related to heat transfer.