Questions tagged [diesel]

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seemingly Impossible diesel cycle question

An engine operates an ideal Diesel cycle using argon as the working fluid (R = 0.2081 kJ/kg.K, Cp = 0.5203 kJ/kg.K). At Vmax and Pmin T = 290 K. At Vmax and Vmin of the engine cylinder is 1,200 cm3 ...
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2answers
43 views

Inerting system for biodiesel tanks?

I have an interesting problem. We have an off-grid house that uses mostly solar + microhydro + batteries for most of energy needs (which include heatpump-based heating). However, we do need to run a ...
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1answer
19 views

How can I express parameters of a natural gas generator in terms of a diesel generator?

I am using the REOpt tool from the U.S. National Renewable Energy Lab to help in sizing a new battery energy storage system and solar PV array for an existing building. The building already has a ...
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0answers
25 views

Fabrication strategy to build larger version of our ESP

Our setup https://www.youtube.com/watch?v=uKuzshqjkYA The diesel generator exhaust is routed via our test setup. (notice the difference between ON/OFF states). Generator in test is similar spec as a ...
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1answer
32 views

Where can I find efficiency metrics for diesel engines?

I am doing long term planning for a small fleet of tugboats. A lot of the engines (propulsion, generators, hydraulics) are Detroit Diesels of various sizes (e.g., 4-71, 6-71, 12V-71). Newer engines ...
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2answers
474 views

Why is soot produced in diesel exhaust, since diesel runs lean?

Since diesel runs lean, why is soot produced in diesel exhaust? Soot is carbon particles due to incomplete combustion. But, since diesel runs lean with plenty of oxygen, why does this happen?
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5answers
3k views

Why do some diesel engines run on diesel fuel and others on fuel oil?

Trucks and smaller vehicles with diesel engines run on diesel fuel which looks more or less like kerosene - less flammable than gasoline, low viscosity liquid. However larger diesel engines like this ...
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1answer
143 views

In a diesel engine, does more heat leave the engine through the tailpipe or the radiator?

Diesel exhaust is hot, and there's a lot of it. Diesel radiators also get pretty hot. In a typical diesel engine, which one is dissipating more heat? EDIT: In response to a request for specificity ...
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3answers
1k views

Three-phase versus single-phase operation of a generator

My generator (a Fermont MEP-803A, 4 cyl diesel, 10kW rated) can run in three distinct modes: Single-phase 120V, in which one terminal is hot, and another is neutral Single-phase 120V/240V, in which ...
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1answer
690 views

How long can UK diesel be stored?

We have standby diesel generators that are only run a few times a year. How long can we reasonably keep the diesel stored on site before using or disposing of it? It is accepted that there is a ...
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1answer
46 views

What developments made diesel engines suitable for personal cars in the 1970s/1980s?

Both diesel and gasoline engines were developed in the late 19th to early 20th century. Diesel engines were for the most part of the 20th century used mostly for large applications in ships, trains, ...
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4answers
347 views

Why do steam and diesel engines have differing cylinder configurations?

Consider a fixed steam engine, such as in a Lancashire cotton mill or pumping in a Cornish mine. Then consider a fixed diesel engine such as a large generator or ship's engine. Why does the steam ...
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3answers
2k views

Preheating Diesel before injection?

Significant amount of heat is lost from an engine by various means, so to recoup the energy, is it possible to increase efficiency via heating of diesel fuel prior to injection using waste engine heat ...
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0answers
31 views

Low pressure Diesel pumping with High pressure Gasoline pump?

We are in desperate search of suitable pumps for one of our applications. We need to be able to pump Diesel fuel in a range going from 5bars to 125bars. To do such thing, I've been looking at Bosch ...
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3answers
37 views

Efficiency of an engine

What is meant by thermodynamic efficiency of an engine? and what are the factors that affect the thermodynamic efficiency of a diesel engine?
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2answers
1k views

Is a filter burst possible under fuel line pressure?

I have read a few ISO standards for performing the so-called 'burst pressure' test in which a filter or an element of one is tested to failure. I am curious whether such a failure can occur under ...
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3answers
264 views

Why do diesel engines tend to have larger engine displacements?

There are cars with petrol engines having 1,0 l or even less engine displacement but I have never seen a car with diesel engine having less than 1,5 l. Are there technical reasons that diesel engine ...
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1answer
862 views

What are the limiting factors on diesel engine compression ratios?

Higher compression ratios in internal combustion engines generally improve the engine's fuel efficiency. But diesel engines don't seem to go above a ratio of 25 or so. What is the limiting factor for ...
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3answers
518 views

Why diesel engines are considered steady torque engines?

Diesel engines are considered "steady torque", which means that torque is same no matter the revolutions whereas torque depends on revolutions for an engine that runs on Otto cycle. What is the ...
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1answer
108 views

Diesel injector nozzle geometry

I thought of an injector nozzle for a diesel engine with an alternate combustion chamber format (somewhat like a Heron combustion chamber), and would now like to get an estimate of the size of the ...
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2answers
161 views

Why are 4-stroke diesel engines preferred in new developments?

2-stroke engines seem to offer a massive advantage over 4-stroke engines. In the case of gasoline engines, there is a need for forced induction, but in the case of large diesels (which invariably ...
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1answer
170 views

Balancing Locomotive Power

My first post here. I'm curious about how power is balanced in multiple diesel-electric locomotives. I understand to that two locos can be ganged in terms of controls, to set speed etc, so that one ...
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2answers
1k views

Limitations of the cut-off ratio in real-world diesel engines

In an ideal diesel cycle, the cut-off ratio is set by the maximum gas temperature after combustion. That's all fine and good, but in a real-world engine what controls the cut-off ratio, and what are ...
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1answer
9k views

Can a water-pump pump diesel?

After some research, I found that diesel is my choice of fuel. Now I need a way to pump it to the engine. My main constraint is price. So my question is can I use a water pump like one of these, to ...
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2answers
3k views

Diesel or Gasoline? Which one is more dangerous to our health?

I have an overall question that's been bothering me for years. Which is more dangerous for our health, a diesel car or a gasoline car? This is quite a cliche question and I can find a lot of ...
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4answers
1k views

Does a diesel-like (ignition by compression) engine running on gaseous fuel exist?

I think, it could lead to, for example, very environment friendly and very efficient urban traffic. But I also think, it required very precise part construction. Do such things exist? At least in ...