Improving The Delta-T
Is another blog about saving thousands on air conditioning one too much? We hope not. Since refrigeration and air conditioning are costing American business billions of dollars and with such great opportunities for efficiencies, we are ever eager to talk about this subject. Due to the fact that daytime peak energy is mostly responsible for the pollution caused by power plants, if you aren't already, you will soon be paying much more for cooling. That is why now is the right time to improve the efficiency of your existing air conditioning systems and chillers. And I'm not talking about changing your filters and call for a service visit type of efficiency. I'm talking about proven strategies specialized to your particular system to yield considerable savings with rapid ROI's. These technologies are designed to restore "like new" performance, reduce maintenance, sanitize and extend the life of your cooling equipment. There is good reason I concentrate so much effort in improving heat exchange or Delta-T. It is the difference between the air temperature returning to the cooling system and the air temperature being supplied to the room. This difference is important, it should be over 15 or 16 degrees. The greater this number means the system is creating colder air faster and it will satisfy the thermostat faster and turn the system off sooner. Rocky Mountain Efficiency specializes in several methods that will increase HVAC and refrigeration system efficiency and reduce runtime. In this blog we will focus on one of our most effective and beneficial methods of cooling system efficiency.
All HVAC and refrigeration systems regardless of type, operate with a closed loop refrigerant system containing a possible variety of refrigerants and a mineral oil or synthetic oil. That oil will vaporize and travel freely with the coolant, lubricating all critical moving compressor parts and seals. The manufactures oil will, over time, adhere to the inside of the coil lines insulating them, reducing heat exchange and causing oil fouling. Our Lubrication Enhancement technology is a highly effective process that has shown to improve heat exchange and increase the Delta-T. Not only is this oil so slick that it can reduce the running amps 5 to 15% but it is designed to bond with the metal alloys used for cooling coils on a molecular level. That bonding is a very important feature as it will protect the equipment and replace the stuck on oil insulating coating and reduce oil fouling within the closed loop. Within 2 weeks you will see the resulting improvement in Delta-T, and then the bill. To illustrate the importance of this issue the American Society of Heating Refrigeration and Air Conditioning Engineers dedicate section 4.11 of their ASHRAE handbook-1985 to this issue. They quote “the vapor entering the condenser often contains a small percentage of impurities such as oil. Oil forms a film on the condensing surfaces, creating additional resistance to heat transfer.” ASHRAE also states that HVAC systems typically lose 7% efficiency in the first year, 5% the second year and 2% each year following, due to oil fouling. Believe it or not their only stated solution is to oversize the unit by 15%.
4/2/2015 1:57:57 PM