How can heat pumps be more than 100 efficient?
By contrast, heat pumps seemingly undertake the impossible: you get more heating out than the energy you put in. This is possible because we are using energy to move heat – rather than converting the energy directly to heat. As a result the apparent efficiency in terms of heat output is greater than 100%.
What is ETA efficiency?
The efficiency of a system in electronics and electrical engineering is defined as useful power output divided by the total electrical power consumed (a fractional expression), typically denoted by the Greek small letter eta (η – ήτα).
What is ETA equal to?
| Greek name of letter | Upper Case Symbol | English equivalent |
|---|---|---|
| Zeta | Ζ | Z |
| Eta | Η | E |
| Theta | Θ | Th |
| Iota | Ι | I |
What is the symbol of ETA?
Greek Alphabet
| Letter | Uppercase | Lowercase |
|---|---|---|
| Eta | Η | η |
| Theta | Θ | θ |
| Iota | Ι | ι |
| Kappa | Κ | κ |
What is the difference between Epsilon and ETA?
So, an Eta (η); which is pronounced like the “a” in the English word “day” (even though we call it a long e), is distinguished from Epsilon (ε) by transliterating the Greek η as ē and the ε simply as e….
| Examples | Comments | Transliteration |
|---|---|---|
| ὥρα | an hour (cf. Mt 10:19, etc.) | hōra |
What is the name of symbol of efficiency?
Symbols for physical quantities and their international units
| symbol | quantity | unit |
|---|---|---|
| η | efficiency | unitless |
| P | power | watt |
| ω, ω | rotational velocity, rotational speed | radian per second |
| α, α | rotational acceleration | radian per second squared |
What are the 7 Greek vowels?
The vowels are α, ε, η, ι, ο, ω, υ. The remaining letters are consonants.
What makes the oo sound in Greek?
If two vowels came together, they preferred either to pronounce the two vowels together as one sound (called a DIPHTHONG, Greek for “double sound”), or to CONTRACT the two vowels to form either a single long vowel or diphthong (cf. S 59)….1. Any vowel + ι or υ.
| α + υ | = αυ | “ow!” |
|---|---|---|
| ο + υ | = ου | “oo” |
What is an improper diphthong?
n diphthong A coalition or union of two vowels pronounced in one syllable. An “improper” diphthong is not a diphthong at all, being merely a collocation of two or more vowels in the same syllable, of which only one is sounded, as ea in breach, eo in people, ai in rain, eau in beau. (See digraph.)
What does χ mean?
Chi (uppercase/lowercase Χ χ) is the 22nd letter of the Greek alphabet. It is used to represent the “ch” sound (as in Scottish “loch” or German “Bauch”) in Ancient and Modern Greek. In the system of Greek numerals, it has a value of 600. Letters that came from it include the Roman X and Cyrillic Х.