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Difluoromethane is a molecule used as refrigerant that has prominent heat transfer and pressure drop performance, both in condensation and vaporization. [6] It has a 100-year global warming potential (GWP) of 675 times that of carbon dioxide, and an atmospheric lifetime of nearly 5 years. [ 7 ]
The suffixes "(Z)" and "(E)" may be used to differentiate - and -(cis- and trans-) isomers. For larger molecules, numerical "digits" exceeding 9 may occur; in this case, these numbers are separated by dashes. For a cyclic carbon skeleton, the prefixed capital letter "C" is used.
A coolant is a substance, typically liquid, that is used to reduce or regulate the temperature of a system. An ideal coolant has high thermal capacity, low viscosity, is low-cost, non-toxic, chemically inert and neither causes nor promotes corrosion of the cooling system.
The cost to convert a vehicle to propane in Canada is approximately CA$4,000 to CA$6,000 for the current vapour or liquid fuel injected technology, and fleet users can expect a payback on the conversion cost within a year. Converting a vehicle to propane is approximately half the cost of converting a vehicle to natural gas in Canada.
The vehicles with the special paint looked like ordinary cars, but felt much cooler to the touch. Nissan showed Tuesday what it called a “cool paint” to keep people inside vehicles cooler ...
These were low-cost solutions, typically used for retrofitting to older cars or for smaller, cheaper cars. Three-way converters are effective when the engine is operated within a narrow band of air–fuel ratios near the stoichiometric point. [24] Total conversion efficiency falls very rapidly when the engine is operated outside of this band.
Yet, NGV was very slow to take off due to cheaper LPG fuel, a pre-existing LPG fleet, and the low conversion cost of local LPG conversion shops compared to factory-installed CNG or conversion. A significant effort was made when the state-controlled oil company PTT PCL built a network of natural gas refueling stations. The cost of subsidy was ...
Most modern cars are built with organic acid technology (OAT) antifreeze (e.g., DEX-COOL [25]), or with a hybrid organic acid technology (HOAT) formulation (e.g., Zerex G-05), [26] both of which are claimed to have an extended service life of five years or 240,000 km (150,000 mi).