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quinn148
05-04-2010, 01:34 AM
We are currently designing a heat pump to recover waste heat from a 55 C bath and pump it to a 95 C bath. We are looking at using a mixture of R152a and R245a. Which in studies has provided a good response in the 90-100C heating range. In the particular study the experiment was run using R 134a compressor. Im wondering if anybody has any recommendations for 5-6 kW compressors that can handle discharge temps in the 100 C range.

hammurabi
18-05-2010, 06:17 AM
Hitachi products may have this type.

mad fridgie
18-05-2010, 07:07 AM
We are currently designing a heat pump to recover waste heat from a 55 C bath and pump it to a 95 C bath. We are looking at using a mixture of R152a and R245a. Which in studies has provided a good response in the 90-100C heating range. In the particular study the experiment was run using R 134a compressor. Im wondering if anybody has any recommendations for 5-6 kW compressors that can handle discharge temps in the 100 C range.
All compressors can handle discharge temps of 100C, not a problem. looks like a commercial dishwasher to me?

fpierson
04-09-2010, 03:32 AM
I have a Bristol 12 ton r22 unit in a similar application running r 416. Was originally R12. The Manufacturer used a smaller displacement compressor due to the high head pressures and temp's. The Kiln manufacturer also used copemetics and Carlile compressors. I have recorded discharge temps of 127C with condenser ambient of 74C. Only one Compressor replacement since 1990. One evaporator, 4 expansion valves and one distributor.

jafet ferdhy
28-09-2010, 06:54 AM
i suggest you to use 2 stage compressor. its usually design as rotary type compressor (2 cylinder type)...

NoNickName
28-09-2010, 08:06 AM
R744 transcritical compressors can handle discharge temperatures in excess of 150C

ryanzhao
01-12-2010, 02:32 PM
R744 transcritical compressors can handle discharge temperatures in excess of 150C

who can supply this kinds compressor ?

thanks

NoNickName
01-12-2010, 04:39 PM
who can supply this kinds compressor ?

thanks

Dorin, Frascold, Bitzer just to name a few.

leursky
17-01-2011, 04:09 PM
helloooo guys,
suction pipeline is freezing most of the time & i notice thata the pressure @ low side is to low, how it is happen & whay? anyone can share the idea...

Gary
17-01-2011, 04:18 PM
We are currently designing a heat pump to recover waste heat from a 55 C bath and pump it to a 95 C bath. We are looking at using a mixture of R152a and R245a. Which in studies has provided a good response in the 90-100C heating range. In the particular study the experiment was run using R 134a compressor. Im wondering if anybody has any recommendations for 5-6 kW compressors that can handle discharge temps in the 100 C range.

It's not about the compressor handling the discharge temp, it's about the oil handling the discharge temp.

NoNickName
17-01-2011, 04:20 PM
helloooo guys,
suction pipeline is freezing most of the time & i notice thata the pressure @ low side is to low, how it is happen & whay? anyone can share the idea...

What is it? Describe the system and components.
Also report expected temperatures and readings.

Limelite
19-01-2011, 08:08 PM
sounds like restricted evap air flow, maybe plugged filter, dirty coil anything causing low air flow.