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FINAL VERSION 27 SEPTEMBER 2017 IS HERE.
DIFRFAST WHEN USING CALCULATOR ADDING MACHINE AND MATH RENDERER INCLUDING PRINTING MODEL.
1 FAST TEST OF THE DIFFERENCE, OR DFRCE AFTER THIS LINE
MULTIPLY 25 BY 1,4 AND THE ANSWER IS 35 EXACT.
WHEN DIFFERENT ANSWER ON DEVICE FOR USE THEN DISCOVER DFRCE BY
SUBTRACT 35 FROM ANSWER ON DEVICE.
DIVIDE RESULT BY 35 AND NOTE NEW RESULT.
APPROXIMATE DFRCE INCLUDED IN CALCULATOR OR OTHER DEVICE IS THEN KNOW.
2 USING DFRCE IN CALCULATION FOR WHEN DFRCE HAS 1 TO 7 ZERO DIGIT AFTER DECIMAL POINT
WHEN DFRCE IS NEGATIVE DISPLAY IT POSITIVE USING CHANGE SIGN OR POS/NEG KEY OR DO ZERO SUBTRACT DFRCE OR -1 MULTIPLY BY DFRCE.
ADD 1 TO DFRCE ON DISPLAY OR PRINT TO CREATE FACTOR AND PUT IT IN MEMORY OR AS CONSTANT.
COMPLETE CALCULATION OR A SEQUENCE AND ACHIEVE A RESULT.
DIVIDE LATEST RESULT BY FACTOR OR IN SITUATION WHEN DFRCE IS NEGATIVE MULTIPLY LATEST RESULT BY FACTOR.
DO THE DIVIDE OR MULTIPLY AS ABOVE 1 TO 10 TIME MORE ON LATEST RESULT OF EACH TIME TO DISPLAY RESULT HAS LAST DIGIT YOU NEED AND 2 OR LOWER AFTER OR WHEN DFRCE IS NEGATIVE WITH 8 OR 9 AFTER, ALL DIGITS TO ITS LEFT SHOULD BE SAME AS PREVIOUS RESULT CAN HAPPEN AND LATEST RESULT IS NEAREST TO CORRECT ANSWER.
3 PREPARING RESULT AS THE PROCESSED NEW AMOUNT
WHEN DFRCE IS NEGATIVE ADD 1 TO THE LAST DIGIT AFTER DECIMAL POINT YOU NEED FOR FRACTION IN RESULT, FOR PENNIES OR CENTS IT IS 2 DIGITS AFTER DECIMAL POINT, OR ADD 1 TO FINAL DIGIT OF INTEGER ONLY FOR INTEGER RESULT.
DISCARD EXCESS DIGITS AFTER LAST DIGIT YOU NEED OR ROUND RESULT TO THAT DIGIT.
NOTES
1 THE FAST TEST CAN BE USE ON COMPUTER WHEN A PROGRAMMING LANGUAGE IS USE, OR ONSCREEN CALCULATOR ACCESSORY OR USE SOME CELL IN A BLANK SPREADSHEET. USE DIFRFAST METHOD IN FORMULA FOR SHEET OR GRID CELL CAN BE ALLOW WHEN RESULT VALUE EXCEED A TOLERANCE DEMANDED
2 WHEN DEVICE DISPLAY A MESSAGE THAT FAST TEST RESULT IS CLOSE TO VARIANCE, CLEAR DEVICE DISPLAY BEFORE 4 SECOND
3 WHEN FAST TEST RESULT IS DISPLAY USE THE ZEROS AND 4 OR 5 DIGITS AFTER AS DFRCE FRACTION FOR DEVICE, OR 3 DIGITS AFTER WHEN DIRECTED
4 DEVICE CONTAINING SOME POPULAR PROCESSOR SOMETIME INSIST THAT A USER OR PROGRAMMER UTILISE A SPECIFIC MANDATORY AMERSE DECREASE OR REDUCE METHOD
5 WHEN DIVIDE LATEST RESULT BY FACTOR CONSIDER USE 1 DIVIDE BY FACTOR AS A NEW CONSTANT, THEN MULTIPLY EACH RESULT BY IT
6 WHEN A SUM OF LIST OF POSITIVE AND NEGATIVE VALUE IS BEING DONE, INCLUDING AS PART OF A CALCULATION SERIES, THEN REDUCE OF DFRCE IS DONE AT END OF THAT LIST
7 WHEN CALCULATION SERIES WHICH INCLUDE MULTIPLY OR DIVIDE OPERATION IS BEING DONE THEN REDUCE OF DFRCE IS DONE AFTER EVERY 1 TO 5 OPERATION AS DIRECTED
8 WHEN CHECKING RESULT OF WORK FROM DIFFERENT DEVICE USE DFRCE OF THAT CALCULATING DEVICE FOR FACTOR OR CONSTANT AT EVERY STAGE, EXCEPT LAST TIME FOR EVERY SEQUENCE WHEN RESULT IS TO BE NOTE OR RECORD THEN USE DFRCE AND FACTOR FOR CALCULATOR OR DEVICE IN USE FOR THE CHECKING.
   
New version January 2022 is here.
Installing insulation in the roofspace and some walls of millions of domestic properties has reduced amount of energy the customer uses to maintain a comfortable environment inside a property. Fitting high efficiency hot water and central heating boilers helps to reduce amounts on bills and energy prices are rising significantly.
Estimated proportions of types of fuel in use for power generating facilities are
Coal 3.4 natural Gas 39.3 Nuclear 13.9 Renewable 40.8 and other 2.6
when a customer has energy supply from Renewables then estimated proportions are
Coal 1.8 natural Gas 15.0 Nuclear 1.4 Renewable 80.3 and other 1.5 to end of March 2023. Source is data on supplier websites and customer bill or statement.
These figures are indicating significant changes in the proportions of non-nuclear types and new facilities are constructed to replace older stations including some nuclear installations.
Rarely has the customer obtained access to other details of amounts and units on gas bills until now and presented here for the first time are steps for checking or estimating the full cost of a period of gas use. In these details the letter k represents the amount 1000.
From metering of gas flow in U.K the present and previous readings.
To convert use from cu m or m3 (cubic metre) to kWh (kilowatt hour)
1 Subtract previous reading from present reading for gas use see note (d)
2 Multiply result by temperature and pressure factor 1.02264 see note (a)
3 Multiply result by latest applying calorific value see note (b)
4 Divide result by conversion value 3.6 for use in kWh see note (c)
To estimate cost of use
5 Multiply result by gas tariff pence amount for a kWh (see bill or letter)
6 Divide result by 100 and ignore digits after 2 decimal places
To estimate cost of standing charge
7 Multiply number of days in use period by standing charge pence for a day
8 Divide result by 100 and ignore digits after 2 decimal places
To estimate total cost
9 Add cost of use and cost of standing charge amounts see note (e)
Notes
(a) Factor can vary for different areas and countries
(b) Calorific value varies and 39.274 or similar is a number of 1000 kJoule
(c) Value 3.6 is a number of 1000 kJoule or 1 hour use of energy from near 1 kW
(d) Readings in old unit after step 1 for cu m use multiply result by 2.83
(e) Full cost of use is after taxes discounts other charges and credits are applied
(f) For therm in step 4 use 105.5 conversion value. Multiply result by tariff pence for 100k Btu or a therm continue at step 6. Optionally multiply result by 29.31 continue at step 5.
(g) Values 1.02264 3.6 2.83 105.5 are in regulations and decimal places are restricted.
Produced in Dec 2013 updated Jan 2022 by T Cutler at cenmr134@mail.com in U.K.
 

 
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