LPA® Refrigeration The Thermodynamic Principles Liquid Pressure Amplification Energy Efficient Refrigeration Tomorrows Refrigeration Technology Today

LPA® Refrigeration

The Thermodynamic PrinciplesLiquid Pressure Amplification

Energy Efficient Refrigeration

Tomorrow’s Refrigeration Technology Today

LPA® Refrigeration

How it Works

The LPA® works by boosting liquid refrigerant through the refrigeration system. By increasing the liquid’s pressure, the associated saturation temperature is raised, while the liquid temperature remains the same. The liquid becomes subcooled – reducing the potential for flashing prior to the expansion valve. With LPA®, your business will enjoy higher efficiencies, lower power draws and substantial cost savings.

Tomorrow’s Refrigeration Technology Today Est.1984

Standard System

If you were given the choice of paying 1.14 kwh per ton of cooling or paying for only .57 kwh per ton, which would you choose?

Now you have that option. For years, the refrigeration industry has been taught the necessity of operating systems with high head pressures. Indeed, in the past, if the head pressure was lowered on a system, the cooling effect of the evaporator did diminish.


LPA® Refrigeration

Standard System

However, high head pressure increases the amount of work the compressor has to do. And increased work, results in higher power bills and more frequent repairs. Removing the head pressure controls sounds like a wonderful idea, if you can maintain cooling efficiency. The problem is, as head pressure decreases, flash gas in the system increases.


LPA® Refrigeration

Flash Gas

With the increase in flash gas, the evaporator loses capacity, and oil return to the system is no longer reliable. The life of the equipment may be greatly shortened.Consider a R404a system, with an eight psi drop in the liquid line. At 32°C condensing, flash gas is only 2% by weight. At these higher pressures the bubbles are compressed and present little problem. But if we lower the condensing temperature to 15°C, the flash gas will occupy 34% of the liquid line volume.


LPA® Refrigeration

Flash Gas

What do we do with this excess flash gas? We could use a large expansion valve and let it pass through. If we do this, then a portion of the evaporator is filled with vapour that has no refrigeration effect. The compressor then has to compress this gas that it has already compressed once. In short, we have to de-rate the compressor and the evaporator. The ideal solution would be to prevent the formation of flash gas.


LPA® Refrigeration

LPA® System

The LPA system does just that.The simplicity of the system is what makes it unique.

A small, magnetically-driven refrigerant pump is inserted in the liquid line. The pressure of the liquid is increased 8 to 25 psi, above the flash point. The refrigerant cannot vaporise until it passes through the expansion valve.

This is now the ideal system.


LPA® Refrigeration

Energy Savings

A one-ton, R-404a system at -9°C will consume 1.14 kwh at 37°C condensing. At 15°C condensing, it will consume only .57 kwh. This system may be applied to any refrigeration, air conditioning or thermal storage system using an expansion valve. The equipment can be installed at the factory by manufacturers or it may be installed as a retrofit.


LPA® Refrigeration

In a Nut Shell…

“It is well documented that reduced discharge pressures and the corresponding reduction in compression ratios are beneficial both in terms of system longevity as well as reduced operating costs. The addition of the LPA® system will help to accomplish both these goals”

Typical energy savings 20 to 45% (based on 10°C 50F average mean ambient temperatures) Manufactured in accordance with the PED DIR/97/23/EC “CE” CAT A1 – Gas Groups 1 & 2UL Listed and Certified

Mechanical Life Wet-End +20 YearsMechanical Life Impeller +100,000 HoursMechanical Endurance +300,000 CyclesMechanical Life Motor 12 to 15 Years

Warranty – 7 YearsThe End- please continue on to references… (many more on request)


LPA® Refrigeration

References


“I am writing to express my experience and confidence in the LPA® Liquid Pressure Amplifier technology you provide.”“We demand that any technology we install on a performance contract be proven and reliable. The LPA®, when properly applied and installed, meets those criteria.

Honeywell has installed LPA® projects all over the country. It has our confidence. ““You frequently identify problems with the air conditioning equipment beyond yourscope of work. These suggestions have greatly benefited both Honeywell and our customers.”

“As a result of your product and knowledge, Honeywell recommends LPA®technology as a good effective energy saving project.”

Kevin K. McKenzie, P.E.Professional EngineerPerformance Contract Engineer

LPA® Refrigeration

References


"With respect to floating head pressure, there is no adverse effect on reliability when pressure is reduced below 32°C. In fact, reducing the condensing pressure reduces the compression ratio and generally has a positive effect on both energy consumption and life expectancy. The LPA® will not conflict with Copeland Warranty.”

Richard E. TurnerCopeland CorporationRefrigeration Technical Support

LPA® Refrigeration

References


“This is to advise that Liebert's standard warranty would not be violated when the system is equipped with the LPA® Liquid Pressure Amplifier, provided the pump is installed in accordance withinstallation recommendations provided by the manufacturer.”

David F. PlanitzerLiebert CorporationHeat Transfer Products

LPA® Refrigeration

References


“The addition of the LPA® pump to the systems that we are building for you will have no impact whatsoever on our standard product warranty.” “It is well documented that reduced discharge pressures and the corresponding reduction of compression ratios are beneficial both in terms of system longevity as well as reduced operating costs. The addition of the LPA® to our systems should help to accomplish both of these goals”

Bob McDonoughLarkin CoilsApplied Products Division

LPA® Refrigeration

In ending… Thank you for viewing hysave.com


LPA® is a simple, reliable means of converting a refrigeration system to floating headoperation, which is the efficient operation obtained by allowing the condenser tooperate at lower pressure and temperature when ambient conditions permit.

"To endorse LPA® (by some equipment manufacturers.) is to acknowledge that one'sequipment is not as efficient as it could be. Approval of LPA® by componentmanufacturers is well documented. Since large package equipment manufacturersexercise considerable control over the flow of information, the user acceptance andapplication concerns we have encountered are not surprising.“

“Annual energy savings typically range from 10 to 30% and paybacks of under two years are usually realized.“

Federal Technology AlertFederal Energy Management ProgramDOD, EPA, DOE # RVI 1295

LPA® Refrigeration

Documents

LPA® Refrigeration The Thermodynamic Principles Liquid Pressure Amplification Energy Efficient Refrigeration Tomorrows Refrigeration Technology Today