How to compare g/PSh to kg/hr?

Question

I have two readings of fuel consumption: 1) g/PSh, another one 2) kg/hr. How do i compare both in one standard, either in g/PSh or kg/hr? Thanks!

Answer 1

kg/hr is understandable,but g/PSh is not. Please clarify the abbreviations.

Answer 2

g/PSh = grams per square hecoliter



a hecoliter is 100 liters



In any event, g/PSh is a density measurement since it tells grams per Liter

The best measurement for fuel consumption is the kg/ hr.



You actually have to use them in conjunction. You use the g/PSh to get the density of the fuel, and then you use the fuel consumption, kg/hr, and multiply the density of the fuel by the fuel consumption to get total grams of fuel consumed in a time period

Answer 3

First you might want liters from grams which uses the density of the fuel, for example diesel weighs 830 g/l, so kg/0.830 = liters. For accuracy get the specific density from your fuel supplier.



What is the elusive g/psh?

I found conversions for g/psh and g/kwh in some Honda literature, where 272g/kWh = 200g/psh. This works out to a ratio of ~0.735. There are 735.498... watts in a European/metric (German mostly) type of horsepower called "ps". This is also used in Japan, especially for cars and motorbikes, so we can say that it means a "735W hp" instead of a "746W hp". I guess "psh" is Honda's way of saying "ps horsepower". This type of horsepower is now obsolete by the way. Convert this figure to g/kWh by dividing the g/psh by 0.735498. Thus 200g/psh / 0.735498 = 271.925g/kWh.



Now the figure of kg/h.

This must relate to a specified power level. It may be at the rated horsepower of the engine. First convert this to g/KWh for a comparison. Lets say the specification is for 100hp using the more standard horse power of 746W size.. That is 100hp x 0.746 = 74.6kW. Now the fuel consumed may be 20kg per hour, so the consumption per kWh = 20kg/h / 74.6kWh = 268.1g/kWh or 0.2681kg/kWh.