EcoRenovator - View Single Post - Propane (R-290) for heat pumps?

buffalobillpatrick · 11-13-14, 09:48 AM

More Info:

Critical temps: R290 = 96.8C, R22 = 96C, R410a = 72.5C

One test that I read:
R290 Vs R22
Suction Pressure -6%
Discharge Pressure -12%
Pressure Difference -15%
Pressure Ratio -7%
Discharge Temperature -16K
Volumetric Capacity -14%
COP +0.5%

HD-5 Propane

HD5 grade propane is "consumer grade" propane and is the most widely sold and distributed grade of propane in the U.S. market. HD5 is the highest grade propane available to consumers in the United States and is what propane companies ordinarily sell to their customers. What does HD5 propane mean in terms of specification to an ordinary consumer? It means that the propane is suitable and recommended for engine fuel use, which was the original purpose of the HD5 grade propane specification. HD5 spec propane consists of:

Minimum of 90% propane
Maximum of 5% propylene - propylene is used in the manufacture of plastics
Other gases constitute the remainder (iso-butane, butane, methane, etc.)

The HD5 specification is based on "allowable" contents. For instance, 99% propane and 1% propylene is HD5 grade propane the same as 95% propane and 5% propylene is HD5 propane. Although the product consistency and purity is different, both mixtures are considered HD5 propane because they fall within the allowable limits for the product to be named and labeled as such.

Note: propylene in with the propane is not necessarily a bad thing for refrigerant, it causes some "glide" which is a small range of temperature at which the mixture Evaporates or Condenses.

Same deal with BBQ propane, it has a small amount of Butane and/or Isobutane, which will give some "glide"

11-13-14, 09:48 AM	#252
buffalobillpatrick Master EcoRenovator Join Date: Mar 2014 Location: Florissant, Colorado Posts: 599 Thanks: 814 Thanked 59 Times in 55 Posts	More Info: Critical temps: R290 = 96.8C, R22 = 96C, R410a = 72.5C One test that I read: R290 Vs R22 Suction Pressure -6% Discharge Pressure -12% Pressure Difference -15% Pressure Ratio -7% Discharge Temperature -16K Volumetric Capacity -14% COP +0.5% HD-5 Propane HD5 grade propane is "consumer grade" propane and is the most widely sold and distributed grade of propane in the U.S. market. HD5 is the highest grade propane available to consumers in the United States and is what propane companies ordinarily sell to their customers. What does HD5 propane mean in terms of specification to an ordinary consumer? It means that the propane is suitable and recommended for engine fuel use, which was the original purpose of the HD5 grade propane specification. HD5 spec propane consists of: Minimum of 90% propane Maximum of 5% propylene - propylene is used in the manufacture of plastics Other gases constitute the remainder (iso-butane, butane, methane, etc.) The HD5 specification is based on "allowable" contents. For instance, 99% propane and 1% propylene is HD5 grade propane the same as 95% propane and 5% propylene is HD5 propane. Although the product consistency and purity is different, both mixtures are considered HD5 propane because they fall within the allowable limits for the product to be named and labeled as such. Note: propylene in with the propane is not necessarily a bad thing for refrigerant, it causes some "glide" which is a small range of temperature at which the mixture Evaporates or Condenses. Same deal with BBQ propane, it has a small amount of Butane and/or Isobutane, which will give some "glide" Last edited by buffalobillpatrick; 11-13-14 at 09:59 AM..