By Richard R. Vaillencourt
Completely revised and up to date, this 5th version of a bestseller is helping development managers determine what to appear for and the way to judge ahead of you decide approximately which warrantly is healthier for his or her development and which ESCO can most sensible convey power reductions. This reference will retailer numerous hours doing strength feasibility experiences and linked calculations. the writer, a practising engineer, stocks his secrets and techniques for simplifying advanced strength calculations and demonstrates his precise, time-saving tools. Key issues coated comprise power myths and magic, the walk-through audit, lights, pumps, fanatics, cars, insulation, gas switching, warmth restoration, HVAC and a precis of power calculations.
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Extra resources for Simple solutions to energy calculations
If you completely seal up a room and start an exhaust fan, the fan will eventually stop exhausting air. Even though it will still be running, the high negative pressure on the room side of the fan will eventually be so large that the fan will not be able to overcome the ∆P and air will stop moving. So pay attention to your exhausts. The only way that you can beat the laws of thermodynamics is by refusing to play. Shut off your exhaust fans when not needed. Reduce your exhaust volumes to the lowest possible unless the make-up air is the right temperature.
By moving the temperature of the water entering the air compressor cooling system closer to the temperature of the water leaving the system it becomes possible to gain the savings of turning off your mechanical refrigeration equipment. Installing a separate cooling tower, or simply a separate loop from the existing chiller’s cooling tower to the air compressor, will significantly reduce the operating cost for this cooling water system. During the few hours that this will not satisfy the cooling requirement, chilled water can then be used.
This high-pressure vapor is delivered to a heat exchanger (G) that removes the absorbed heat of vaporization and thus condenses the R-12 back into a liquid at 118 psig where it is collected in the tank. The process is now continuous and good for the environment and (very important) legal. A very important fact is that temperature and pressure are inseparable. As pressure goes up, temperature goes up. As pressure goes down, temperature goes down. So what? Since you get nothing for nothing, the pertinent energy question is: where is energy being pumped into the system?