This seminar report summarizes a presentation on a pistonless pump developed by NASA as an alternative to turbo pumps for rocket fuel. Pistonless pumps have no moving parts besides chamber valves, providing increased flexibility and reliability compared to turbo pumps. Turbo pumps are heavy, complex, inefficient, and failure-prone. In contrast, pistonless pumps have fewer parts, higher efficiency, are simpler to design and manufacture, and have built-in redundancy. The report describes the working of the dual pistonless pump, which alternately pressurizes and refills two chambers to provide steady fuel flow and pressure. Data is presented showing its potential to significantly reduce the cost and improve reliability of rocket fuel pumps.

1. Seminar Report
Presentation
on
PISTON LESSPUMP
Submitted by – Simranjeet Singh
B.Tech ME-57
1612240198

2. INTRODUCTION
Pump is a device which converts mechanical energy into hydraulic
energy.
Principle: A partial vacuum created when internal parts of pump
receives mechanical energy .
 NASA have developed a Low cost rocket fuel pump which has
Comparable performance to turbo pump at 80-90% lower cost.
 A turbo pump design requires a large engineering effort and is expensive
to mfg. and test.
This pump saves up to 90% of the mass of the tanks as compared to a
pressure fed system.
. By this pump the rocket does not have to carry heavy load and can travel
with very high speed.

3. Continued-
• APiston lesspump is atype of pump designed to move fluids without
any moving parts other than three chamber valves.
• Thispump provides increased design flexibility & increase
damageand fault tolerance.
• Absenceof piston leads to lessfriction losses & hence
improves efficiency of engineconsiderably.

4. WHYPISTONLESSPUMP??
• Turbo pumps have a reputation for
being extremely hard to design to
get optimum performance
• Lowefficiency –ONLY55%
• Weight of pump is high hence
Undesirable to use.
TURBO PUMP SETUP

5. NECESSITY
• The turbo pumps used in rocket are very heavy, containing many rotating parts by
which there are more frictional losses which more consumption of fuel there by
decreasingthe efficiency of the engine .
• Since the rocket has to remain stable in the space, is difficult and require complex
methods for it. If this pump gets any fault then its reappearance requires long time.
So, there must be such a device which overcomes all the drawbacks of the turbo
pump.
• ThePistonless pump isthe solution for the problems faced by usingturbo pumps.

6. DIFFERENCE BETWEEN TURBO & PISTONLESS PUMP
TURB
O
PUMP
Piston
Less
PUMP

7. WORKING OF PISTONLESS
PUMP (Rocket engine)
It consists of main tank and Two pumping
chambers . The pump starts with both
chambers filled.
Each one being alternately refilled and
pressurized .
One chamber is pressurized, and fluid is
delivered to the rocket engine fromthat
chamber(Step 1).

8.  Once the level gets low in one
chamber, the other chamber is
pressurized;

9.  Flow is thereby established from
both
period
sides
until
during a short
full flow is
established
chamber.
from
Then
the other
the nearly
empty chamber is vented and
refilled.

10.  Finally the cycle repeats.
This results in steady flow
and pressure. The pump is
powered by pressurized
gas which directly acts on
the fluid

11. Working model video of piston less pump

12. FLOW AND PRESSURE DATA FORROCKETFUEL
PUMP

13. DUAL PISTONLESS PUMP
 NASAhas designed, built and tested a
simple, light weight pump (dual piston
less pump) for use in liquid propelled
rocket where a reliable pump with
minimal moving parts is needed.
 This pump has the potential to
reduce the cost and increase the
reliability of rocket fuel pumps by a
factor of 20 to 100.

14. Safety and Reliability
This type of pump is not new in fact it has been used to pump groundwater out
of basements for over 100 years, where reliability is critical.The present design
operates much more quickly and works in space and in a zero gee environment,
but the key to reliability is the slow moving parts and wide operational
tolerances, which allow the pump to work regardless of contamination, leakage
or sensor failures. A complete analysis has shown that many of the failure modes
of the pump involve reduction in performance and no single point failure can
cause explosion or fire. If the valves on one of the chambers fail, there will be a
few seconds in which to execute a safe shutdown of the affected
engine

15. APPLICATIONS
• Deep space propulsion
• X Price vehicle fuel pump

16. ADVANTAGES
• All the hardware in the pump consists of pressure vesselsothe weight is
low.
• The pump can be scaled up or down with similar performance
and minimal redesign issues.
• Low risk development; pump technology has been demonstrated and
prototypes have been built andtested.
• Themanufacturing tolerances need not be tight.
• Less movingparts ,hence lubrication required is quite low.
• Designis simple compared to turbo pumps.

17. DISADVANTAGES
•They cannot pump to higher pressure than drive gas (area ratio is 1:1)
•They cannot use either a staged combustion or expander cycle.
•A gas generator cycle is also difficult to integrate with the piston less
pump.
•The generated gas must be chemically compatible with both the
propellants.
•This gas generator lowers the Ignition start period of the engine

18. FUTURE APPLICATION
Along with latest low
cost engine designs,
pump will make lunch
systemsmore safe,
reliable andaffordable

19. CONCLUSION
• Themost significance of property of Piston lesspump that makes
them different from that of turbo pump ,is the absenceof piston.
• Thisis the most unique technique. In this ,no. of rotatingparts is very
less ascompared to that of turbo pump. Also, it’s installation is very
easy.and moreover, it is light weight than turbo pump. So,it hasless
lossesand improves, rather increases efficiency of engine.Also, it is
much economical than turbo pump.

20. ANY QUERIES
20

21. THANK YOU