Coffee Filter Machine Essay

The experiment objectives is to find out the power required to keep the coffee hot after it has been made and the energy required to keep the coffee hot for a certain period of time by recording the rate of heat loss as the coffee cools down.

Coffee filter machine is simple machine that makes brewing coffee easier for everyone. The working of the coffee filter machine is a very simple machine compared to another electrical appliance. The coffee filter machine consists of six parts:

1. The reservoir for holding the water.

2. The basic heating element.

3. The aluminium tube connected from the water reservoir to the heating element.

4. The shower head or the drip area

5. The one way valve.

6. Another tube connected the reservoir to the shower head or the drip area.

In the heating element, it

The boiling water causes the water bubbles to rises up in to the aluminium tube allowing some water to move upwards on the boiling bubbles.

4. The boiling water flows into the shower head or the drip area to open out and drip on the coffee powders.

5. Hot water flows through the coffee powder and become coffee.

Method of data collection

The equipment that was used in the experiment was:

1. Coffee Filter Machine

2. 4,6,8,10,12 cups of water

3. Stopwatch

4. Thermocouple and temperature data logger

5. Mass balance

The procedure:

1. The number of cups was selected and the mass were measured by measuring the mass of the cup and the mass of the cup and water. Then, the mass of the cup and the water minus the mass of the cup.

2. The water was poured into the water reservoir.

3. The coffee machine was switched on.

4. Once the coffee was made, the jug was removed from the coffee machine and placed on the table.

5. The temperature of the coffee was immediately taken with the interval of 2 minute over period of 30 minute.

6. The collected data were made into table and plotted into a graph of Temperature vs Time.

7. The gradient, ∆T/∆t was determined assuming the relationship