As physical units of work and power can be converted to other expressions of energy, based on the first law of bioenergetics, you need to understand how to convert the kgm unit to other units. Energy conversion table online unit conversion and. Since has units gevsec and c has units ms, it is always possible to convert an expres. Energy conversion device energy input energy output energy output energy input 1st law useful energy output energy input 2nd law figure 41. Molecular thermodynamics week 1 lecture assessments energy. Then take the resulting figure and convert it to mwh using a conversion tool. We classify this information by energy conversion, transport, and storage technologies available now, and those likely to be available in the future. A calorie cal is the amount of energy required to raise the. You may not recognize the units of work and power used here. Introduction to thermodynamics common units and conversion factors for energy analysis. Most of these numbers have been taken from an old book by karplus and porter.
For example, 10 barrels of asphalt has a heat content of approximately 66. The expression produce energy typically refers to the conversion of stored energy into a desired form for practical use. For example, when a light bulb with a power rating of 100 w is turned on for one hour, the energy used is 100 watt hours wh, 0. Energy units need to distinguish between energy and power common energy units. Standard unit multipliers are used to convert billed units to kbtu. Sustainable energy science and engineering center energy conversion concerned with the transformation of energy from sources such as fossil fuel and radiation from sun into conveniently used forms such as electrical energy, propulsive energy, heating and cooling. Unit conversions energy, power, flux 84 energy is measured in a number of ways depending on what property is being represented. Energy measurements and conversion iowa state university. Energy units and conversions uci physics and astronomy. Conversion of formulae and quantities between unit systems. Commonly used measure of fuel energy, heating and cooling quantities. A british thermal unit is defined as the amount of heat required to raise the.
The universal soil loss equation usle is widely used to estimate erosion in the united states and foreign countries. For your convenience, you may convert energies online below. Jan 14, 2018 expressed in units of energy per volume molar or energy per mass. We can easily make conversions from english units e 1 kilogram 2. Energy massvolume conversion factors for units of measure, individual conversion factors are stated in the specifications guide for each commodity alongside individual assessment codes. Pdf introduction to thermodynamics common units and. This gives you the energy content of the fuel used. To convert from a unit y in the left hand column to a unit x in the top row, mutiply by the table element, m x,y. Conversions between mass, volume and energy are dependent on the physical qualities of the substance in question, particularly the density andor energy density. To ionize a molecule means to remove an electron to in nite distance.
Energy from engine is transferred to generator which makes electricity for lights and for charging. Hartrees ev kjmol kcalmol cm1 v for 1etransfer k equivalent temerature boltzman population ratio at 298. Converting mass, distance, and mechanical units only involves powers of 10. These conversion tables are provided for your reference. The thermal conversion factors presented in the following tables can be used to estimate the heat content in british thermal units btu of a given amount of energy measured in physical units, such as barrels or cubic feet. Introduction to units and conversions the metric system originates back to the 1700s in france. Energy units converter enter your energy value in the box with the appropriate units, then press tab or click outside of the input box. Electromechanical energy conversion theory is the cornerstone for the analysis of electromechanical motion devices. This is quite different to the imperial system of units where every conversion has a unique value. Energy conversion calculator how to convert energy units. Energy sources and commodities are measured by their mass or weight, volume, and energy.
Energy conversion and efficiency philadelphia university. For example, batteries convert chemical energy to electrical. This is because the density of liquids varies slightly with temperature, so the temperature of the fluid is given with the unit conversion. Mks unit cgs unit conversion mass kilogram gram 1kg 103gm distance meter centimeter 1m 102cm energy joule erg 1j 107erg force newton dyne 1n 105dyne table 1. Conversion factors were derived by considering the dimen sions of each variable the usle factors. Energy units and conversions coal, natural gas, and oil are fossil fuels. The efficiency of an energy conversion device is a quantitative expression of this balance between energy input and energy output.
First, convert the number of feet to meters, and then convert the number of inches to meters. Conversion of units below is the table for commonly used unit conversion. When coal, natural gas, and oil are burned, a certain amount of energy is. Schematic of the energy usage and conversion in a process. Energy unit conversion to aa ajlm acm vhz ekev wncm1 eerg from. In some unit conversion tables you may see units conversions reported at a specific temperature. Power is the rate at which energy is generated or consumed and hence is measured in units e. The conversion of height from feet to meters is a twostep process. Human drinking coffee and pushing on the gas pedal conversion of chemical energy to mechanical 5. Energy from pistons is transferred via gears to rotation wheels and forward motion of car mechanical energy 6.
Thermodynamics fundamentals for energy conversion systems. All basic quantities length, area, time, rate, momentum, mass can be expressed in terms of powers of gev. Schematic representation of an energy conversion device. Mechanism and explanation scale, proportion, and quantity systems and system models energy and matter. Conversion factors are provided in detailed tables at the end of this document. Also, explore many other unit converters or learn more about energy unit conversions. The quantities for these fuels are expressed in different units. Unit conversion is the operation that allows you to convert a measurement of length. Some units constants, and conversions and energy of familiar. E notation is an alternative format of the scientific notation 10 x. Conversion of chemical energy is the most important to society because this includes chemical conversion to thermal energy combustion and chemical conversion from electromagnetic energy photosynthesis. The quantity of heat required to raise the temperature of 1 pound of liquid water by 1 degree fahrenheit at the temperature at which water has its greatest density approximately 39 degrees fahrenheit. To become familiar with energy units and conversion of units.
Chapter 7 energy conversion systems options and issues tg c ct cwp a1 3 4 1 b2 2 ip b1 sr ph e csv p pw cp ff iw m figure 7. The total energy input is recovered in various other forms and hence the. Some of the important derived physical quantities are listed in table ii. It is known as a decimal system because conversions between units are based on powers of ten. To study the relationship between heat energy, mass, temperature change and specific heat. On converting units, you can directly convert between gauge pressures of different units and you can convert between absolute pressures of different units. Converter other energy unit to joule joule to other unit. Unit conversion conversion of units unit conversion table. If energy is released during conversion of chemical energy the process. Pdf energy can be converted from one form to another in a device or in a system. Additionally, the worksheet has two sections that can be used for differentiation.
Energy forms and energy conversions worksheet you do energy transformations 2 you do use these worksheets as reinforcement if you still see students struggling with energy conversion. Conversion of formulae and quantities between unit systems nikolai g. Kinetic, potential, thermal, chemical, electromagnetic etc. British thermal unit btu measurements and conversions. Stored thermal energy is sensible and latent heat and is expressed in units of energy per mass btulbm. An energy unit that is used in atomic physics, particle physics and high energy. The theory allows us to express the electromagnetic force or torque in terms of the device variables such as the currents and the displacement of the mechanical system. Mks unit cgs unit conversion mass kilogram gram 1kg 103gm. These conversion factors may be used to con vert usle factor values given in u. Unit conversion table standard prefixes prefix used in code prefix for written unit multiplier da deka 10 h hecto 100 k kilo m mega 1e6 g giga 1e9. Download as pdf e notation is an alternative format of the scientific notation 10 x. Btu british thermal unit energy required to heat one lbm of water one degree fahrenheit. Kilowatthours are a unit of power times a unit of time, which gives a unit of energy. You must first convert the btu content of the fuel per unit to millions of btu by dividing the fuels btu content per unit by 1,000,000.
41 1157 1454 154 402 158 1867 213 1119 338 1469 1480 928 240 1809 919 360 1485 490 375 1759 1822 567 366 96 464 252 1667 940 878 707