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I recall talking about ceiling mounted radiators? Easier to retrofit and don't get covered up by furniture.
Yes, likely easier to install. Another option is to install thin heating tubes in the walls embedded within the plaster.
"Plan and prepare for every possibility, and you will never act. It is nobler to have courage as we stumble into half the things we fear than to analyse every possible obstacle and begin nothing. Great things are achieved by embracing great dangers."
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Going back to the older way of having walls radiating heat into the house.
You'd want to do this work at the same time as the other walls are being stripped for insulation I expect. I wonder if you could repurpose the underfloor heating kits to do it?
Use what is abundant and build to last
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The video at the link below is about an innovative drilling technique that might be of interest to someone thinking about ground level heat pumps. The invention is to use an "inchworm" technique to bore through the regolith.
https://www.youtube.com/watch?v=KlbfBrVAEH8
Costs ** should ** be less than if traditional long pipe drilling is used.
This method might even work on Mars, with a bit of adaptation.
Pretty clever. Swiss, of course.
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The link below points to an article on heat pumps published in 2023.
It features an innovation to improve efficiency.
https://getpocket.com/explore/item/how- … wtab-en-us
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It is a misconception that a heat pump is gaining enrgy from the earth as heat rather its using the loop to when producing heat the ground loop is sinking cold. when the air condition is on a blowing cold into the home it is sinking heat to the colder earth.
In the winter, a ground loop heat pump cycle draws low-grade heat from the earth. A fluid circulates through underground pipes, absorbing the ground's natural heat. This warm fluid transfers its heat to a refrigerant in the heat pump, which then becomes a very hot gas after being pressurized. A reversing valve sends this hot gas to an indoor heat exchanger, where the heat is released into the home's air distribution system.
Step-by-step cycle
Heat absorption:
In winter, an antifreeze fluid is pumped through the underground loop, absorbing the low-grade heat from the earth, which is warmer than the outside air.Heat transfer:
The warm fluid returns to the heat pump and transfers its heat to a refrigerant through a heat exchanger.
Compression: The refrigerant is then compressed, which significantly increases its temperature.Heat distribution:
A reversing valve directs the superheated refrigerant to an indoor heat exchanger coil. Here, the heat is transferred to the air, which is then circulated throughout the home via ductwork.Refrigerant expansion:
The refrigerant, now cooler, passes through an expansion device, drastically lowering its temperature and pressure.Cycle repeat:
The now cold refrigerant returns to the ground loop heat exchanger, ready to absorb more heat from the ground and repeat the cycle.
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AI Overview
An all-purpose heat pump refrigerant pressure and temperature (PT) chart is not available because the pressure-temperature relationship varies dramatically by refrigerant type. Instead, specific PT charts must be used for common refrigerants like R-410A, R-22, and R-134a.
The purpose of a PT chart
HVAC technicians use a PT chart to diagnose and troubleshoot a system by comparing the measured pressure to the saturation temperature of the refrigerant.
The chart applies to the saturated state, where both liquid and vapor refrigerant coexist.
By reading a pressure gauge and cross-referencing it with the chart for the correct refrigerant, a technician can confirm the system's boiling (evaporator) and condensing (condenser) temperatures.
During a system check, the chart is used to determine the correct superheat and subcooling levels, which helps confirm proper system function.
Pressure and temperature charts for common heat pump refrigerants
R-410A (Most modern heat pumps)
R-410A, sold under trade names like Puron, is a modern, high-pressure refrigerant used in most new heat pumps.[center]R-410A Refrigerant: Pressure-Temperature Chart[/center]
[table]
[tr]
[td]Temperature (°F)[/td]
[td]Pressure (PSIG)[/td]
[td]Temperature (°F)[/td]
[td]Pressure (PSIG)[/td]
[td]Temperature (°F)[/td]
[td]Pressure (PSIG)[/td]
[/tr]
[tr]
[td]-40[/td]
[td]11.6[/td]
[td]30[/td]
[td]96.8[/td]
[td]100[/td]
[td]317.0[/td]
[/tr]
[tr]
[td]-30[/td]
[td]22.5[/td]
[td]35[/td]
[td]107.0[/td]
[td]105[/td]
[td]340.0[/td]
[/tr]
[tr]
[td]-20[/td]
[td]36.8[/td]
[td]40[/td]
[td]118.0[/td]
[td]110[/td]
[td]365.0[/td]
[/tr]
[tr]
[td]-10[/td]
[td]55.2[/td]
[td]45[/td]
[td]130.0[/td]
[td]115[/td]
[td]391.0[/td]
[/tr]
[tr]
[td]0[/td]
[td]70.0[/td]
[td]50[/td]
[td]142.0[/td]
[td]120[/td]
[td]418.0[/td]
[/tr]
[tr]
[td]5[/td]
[td]78.3[/td]
[td]60[/td]
[td]170.0[/td]
[td]125[/td]
[td]446.0[/td]
[/tr]
[tr]
[td]10[/td]
[td]96.8[/td]
[td]70[/td]
[td]201.0[/td]
[td]130[/td]
[td]476.0[/td]
[/tr]
[tr]
[td]15[/td]
[td]96.8[/td]
[td]75[/td]
[td]217.0[/td]
[td]135[/td]
[td]507.0[/td]
[/tr]
[tr]
[td]20[/td]
[td]70.0[/td]
[td]80[/td]
[td]235.0[/td]
[td]140[/td]
[td]539.0[/td]
[/tr]
[tr]
[td]25[/td]
[td]87.3[/td]
[td]90[/td]
[td]274.0[/td]
[td]145[/td]
[td]573.0[/td]
[/tr]
[/table]How to use a P-T chart
Gather readings: With the heat pump running, use a manifold gauge set to measure the suction (low-side) and liquid (high-side) pressures.
Match pressure to temperature: Find the measured pressure on the chart and locate its corresponding temperature. This tells you the saturation temperature of the refrigerant in that part of the system.
Perform calculations: For instance, you can check the evaporator coil's saturation temperature against the air temperature entering it. The difference between these values indicates the superheat, which helps a technician assess the system's charge and cooling performance.
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