System Modifications
 
Refrigeration Unit Modifications
 
The refrigeration unit was modified so that the temperature within the refrigerator was automated. Since the conduction rod, shown in Figure 1 below, was what supplied the heat to the ammonia gas, the heat supply to this rod had to be diverted; this was done by installing a bypass system.
 
The bypass system consists of piping and a valve. The valve is controlled by an actuator. The actuator receives a signal (determined by the refrigerator’s temperature) from a controller, which then causes it to turn the valve. The modified system with the bypass system is shown below in figure 2.
 
 
 
 
 
 
 
 
Figure 1: Previous Set-up of Refrigeration Unit with Conduction             Rod
Figure 2: Bypass Piping System with Valve Installed
Water-Heating Unit Modifications
 
The water-heating unit was modified so that the water in the water-heating unit would not reach temperatures above 100 degrees Celsius. This was done by adding a bypass piping system and a distiller. The bypass piping system consist of piping and a valve that diverted the hot exhaust gas from the water-heating unit to a distiller. The valve is manually controlled by the user when the user desires to have hot water. Figure 4, below shows the bypass system being silver brazed. The housing where the distiller is housed
was welded copper that was 12” by 12”. It is shown in Figure 5.
 
 
 
 
 
 
 
 
 
 
Engine Conversion Modifications
 
The engine was converted to run on propane and gasoline. This was done using an adapter method of conversion. Figure 6 shows the completed converted engine with regulator.
Figure 4: Brazing of Bypass System for Water-heating Unit
Figure 5: Distiller Housing
Figure 6: Engine with Conversion Kit
Figure 3: Controller and Actuator for Valve