Logged in as: Anonymous Search | Active Topics |

Liquid piston engine Options
Jeff@Restoule
#1 Posted : Monday, October 13, 2008 6:51:10 AM
Rank: Guest

Posts: 134,494

I see, in the Mother Earth News classifieds, and ad for a liquid piston engine made from pipe fittings at www.growbiz-abco.com

Has anyone tried this or have any knowledge beyond what is on their web page ?

LaserBillA
#2 Posted : Monday, October 13, 2008 6:51:10 AM
Rank: Guest

Posts: 134,494
I've looked at others on the internet and there are advantages and disadvantages.

Pros:
 1. The liquid fills gaps and means you can use less precise parts.
 2. Easier to contain a gas other than air.
 3. Liquid can also be used for the heat transfer medium.

Cons:
 1. Less efficient since the liquid has a higher viscosity
 2. Less precise parts are less efficient anyway.
 3. Lower power levels for a given size/efficiency.

-
Personally I'm planing a gear pump driven R290 freon system for my "ground source" sterling engine generator. In my case one of the few liquids that would be compatible is mineral oil and that's too viscous for anything other than a lubricant.
I'm also planing on using the patented two valve gravity system instead of a recovery/makeup pump.

Users browsing this topic
Anonymous
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.





Subscribe Today - Pay Now & Save 66% Off the Cover Price

First Name: *
Last Name: *
Address: *
City: *
State/Province: *
Zip/Postal Code:*
Country:
Email:*
(* indicates a required item)
Canadian subs: 1 year, (includes postage & GST). Foreign subs: 1 year, . U.S. funds.
Canadian Subscribers - Click Here
Non US and Canadian Subscribers - Click Here

Lighten the Strain on the Earth and Your Budget

MOTHER EARTH NEWS is the guide to living — as one reader stated — “with little money and abundant happiness.” Every issue is an invaluable guide to leading a more sustainable life, covering ideas from fighting rising energy costs and protecting the environment to avoiding unnecessary spending on processed food. You’ll find tips for slashing heating bills; growing fresh, natural produce at home; and more. MOTHER EARTH NEWS helps you cut costs without sacrificing modern luxuries.

At MOTHER EARTH NEWS, we are dedicated to conserving our planet’s natural resources while helping you conserve your financial resources. That’s why we want you to save money and trees by subscribing through our earth-friendly automatic renewal savings plan. By paying with a credit card, you save an additional $5 and get 6 issues of MOTHER EARTH NEWS for only $12.00 (USA only).

You may also use the Bill Me option and pay $17.00 for 6 issues.