The renal tubule carries urine from the glomerular capsule to the renal pelvis. 1  The curvy first section of the renal tubule is known as the proximal convoluted tubule. 2  The tubule cells that line the proximal convoluted tubule reabsorb much of the water and nutrients initially filtered into the urine.he renal tubule carries urine from the glomerular capsule to the renal pelvis. 1  The curvy first section of the renal tubule is known as the proximal convoluted tubule. 2  The tubule cells that line the proximal convoluted tubule reabsorb much of the water and nutrients initially filtered into the urine.
The Damper. Cold air is produced in the freezer as liquid refrigerant passes through the evaporator coils and changes into gas. This process causes the surface of the evaporator coils to become extremely cold. A circulation fan blows air over the coils and through a vent into the refrigerator. Within the vent is a damper. The damper is a small flap that controls the flow of air from the freezer to the refrigerator. It is usually found in the top of the fridge or on the back panel near the top. The damper is controlled by a thermostat, which triggers it to open and close depending on the temperature of the air in the refrigerator.
A vent damper is an automatic devise that shuts off the flue pipe when the burner is not running. A vent damper has no effect on the running efficiency of the appliance. It only saves off-cycle losses of heated air. Therefore, if the appliance is in an unheated space, there is no benefit to a vent damper. A vent damper can achieve up to 10% annual fuel savings.