Questions tagged [heating-systems]

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What is the most common control method in Underfloor heating?

I am trying to research the common methods on an underfloor heating system that are available in the market. I know there are usually, On/Off control to control the flow of water into the pipe ...
Tanay Rastogi's user avatar
3 votes
0 answers
50 views

Yellow/Purple Flue gas in the stack

I was informed today by one of the on-site operators that they saw the colour of the stack flue gas change from colourless to a yellow/purple gas for a short period (~5mins) before returning back to ...
SimpleJack's user avatar
3 votes
0 answers
276 views

What is the minimum height of a chimney needed in a camper?

Like a lot of people nowadays, I'm fitting a log fire into the back of a camper van but can't find the minimum height above the roof for the chimney. Ideally, it should be as low as possible for ...
Mike's user avatar
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3 votes
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117 views

Why does a radiator valve require more torque after a few turns?

I'm automating a non-thermostatic household radiator valve, by replacing the knob with a DC motor and adding some support structure. You can see the system at work here: https://www.instagram.com/p/...
ris8_allo_zen0's user avatar
2 votes
0 answers
42 views

Comparing EPA emission limits between wood stoves and wood furnaces

Emission limits set by the EPA were updated in 2020. Currently, "Wood-burning stoves" are allowed 2.5 grams/hour of smoke emission [1]. On the other hand, "Wood-burning forced-air ...
bitsmack's user avatar
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2 votes
0 answers
58 views

Heat loss calculation and Energy Balance

The image shows the CAD model of the annealing zone in a galvanization simulator. The zone is electrically heated with a AC current of 5597A at 2.09V. This whole zone is surrounded by insulating ...
Selvaprakash Vijay's user avatar
2 votes
2 answers
343 views

Best way to create separate heating zone for basement

I have 2 heating zone in the house: one for the upper floor and one for main and basement. Both zones split from the main duct into their own ducts and use a damper to close/open. Now I want to ...
ConstantinM's user avatar
2 votes
0 answers
49 views

Increase in target emission rate (TER) when using a air source heat pump (ASHP) in standard assessment procedure (SAP) calculation

I am running a SAP calculation on a proposed building which will be utilising a 8.5 kW ASHP for space and water heating. I am also running a comparative analysis against a mains gas boiler to show the ...
H.B. Finn's user avatar
2 votes
0 answers
23 views

Alternative to heater cartridge for 10mm deep hole?

In a design for a heated block I am working on I only have the space for a 6mm X 10mm hole for my heating element to be inserted into. Originally I had planned to use a 40W heater cartridge but the ...
FEA42's user avatar
  • 245
1 vote
1 answer
422 views

Kiln design, heating element holders

I intend to build a kiln in my free time over the next few months and am trying to avoid my past mistakes (heated too quickly, the kiln started cracking, the kanthal element melted and it was just ...
Semptum Valoris's user avatar
1 vote
0 answers
256 views

best refractory cement for embedded heating element furnace

first post I designed a 2000 watts 1000 degrees Celsius furnace with following chamber size: 11 cm length, 12 cm width and 15 cm depth. The refractory that I use is 1880 C high temp tabular alumina ...
milad Chalipa's user avatar
1 vote
0 answers
50 views

Search for comprehensive term for plants with heat generation with heat storage and operating states

My master thesis deals with systems with several operating states that generate heat and store it in a heat storage. Thereby I analyze combined heat and power plants with combustion engines, but also ...
Anne Bierhoff's user avatar
1 vote
0 answers
25 views

How to build multiple large scale fish tanks with water at different temperatures

I am wondering at a high level what are the material components that might be used in building several large scale fish tanks that are temperature regulated like on a fishing farm. For example, what ...
Lokasa Mawati's user avatar
1 vote
0 answers
61 views

Where to put the booster pump at customer substation in a district heating system?

In a district heating system, one of the houses in the distribution net is not getting the desired heat into their house. This is because the pipes of this customer which connects them to the ...
ptqm's user avatar
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1 vote
0 answers
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Safely evaporate electrolyte from fragile porous substrate

We have porous ceramic platelets of ~50x5x1 mm³ thickness infiltrated with ammonium nitrate solution (NH4NO3). We want to decompose and evaporate it w/o damaging the fragile substrate (decomposition ...
ascripter's user avatar
  • 111
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4k views

What is the gray-body emissivity value of air

Wonder if anyone would know what is the average thermal emissivity value of air relative to blackbody at near room temperatures? I am looking for that magical number between 0 and 1. Looked everywhere ...
user2820052's user avatar
1 vote
0 answers
228 views

equivalent full hours of heating equipment

I would like to know if there is a standard way of calculating the equivalent to a capacity factor but for heating equipment. That is the ratio between the amount of heat delivered during one year ...
Nabla's user avatar
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0 answers
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How to solve power surge caused by curing oven PWM cycle?

I have a Despatch LBB 1-69 lab oven in my shop. It is a single-phase, 110-volt, 30-amp unit. It is wired to a 220 volt, 2-phase, 40-amp panel (on a single 110 volt phase), which is fed by the 100-amp ...
Andrew M's user avatar
1 vote
2 answers
70 views

Running heat pump extra mid-day worth it?

I have a home with a heat pump on the south-facing side of my home, so it gets sun all day. I let my home cool off to 62℉ at night, and at 6 am, when it is usually the coldest outside, I warm my home ...
cjbarth's user avatar
  • 129
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0 answers
15 views

Kanthal winding protection tube?

I have a kanthal wire wound around a D=4mm and L=15mm standard pneumatic tube to solve the problem of freezing one of the tube ports that is exposed to the outer environment (and hence can be clogged ...
dizcza's user avatar
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How to a convert a domestic gas C.H. Boiler to use Hydrogen?

What engineering changes are needed to convert a domestic gas boiler from running on natural gas (i.e. north sea gas) to hydrogen? The UK government is currently planning on switching to using ...
ConanTheGerbil's user avatar
0 votes
1 answer
89 views

What is this thermal insulating material?

I need to thermally insulate measurement chamber heated to 70°C. Material used for this task needs to be also electrically insulating. I tried various materials, but result was always clumsy and ...
Sour Gorilla's user avatar
0 votes
1 answer
37 views

Need advice on building small incubator

I need to build an incubator that can vary temperature between 32 degrees and 36 degrees Celsius with discreet or continuous control. It needs to be made with perspex. It needs to be a two chamber ...
Iskander's user avatar
0 votes
0 answers
29 views

Which heating and cooking techniques can be developed and taught massively and quickly?

HYPOTHESES: As an exercise in thought, let's take for granted some hypothesis: Let's leave aside the "need for electricity" to focus on the need for warming up a house and cooking some food....
Jeremy's user avatar
  • 111
0 votes
0 answers
72 views

Water through a Copper-Coil Heat-Exchanger: How much tubing will be enough?

I am making a hot-water tank for a boat. Within it will be a copper-coil heat-exchanger. Because copper tubing can be rather expensive, I am trying to better understand the design beforehand, and ...
GhostsonAcid's user avatar
0 votes
0 answers
37 views

What is the most appropriate set-up to pressurize air in a closed, confined space?

Assume that we have hot air in a confined closed space of 36 m^3. This hot air will be distributed trough a piping network of 500 m to be blown on trees. What is the most appropriate set-up to ...
user41064's user avatar
0 votes
0 answers
92 views

How to Calculate Change in Temperature Relative to Distance from a Heat Source

Just as the title suggests. I have recently conducted model human ear canal using a heated reservoir (water at consistent temperature) with silicone rubber tubing of all known geometric features. Many ...
Andy Eddy's user avatar
0 votes
0 answers
67 views

How to vary, according to a given sinusoidal profile, the water temperature in a tank, independently of the temperature of the environment?

The water tank in Fig. 1, that is placed in a closed space, has a heat source inside (an experimental device) that liberates 20 to 50 kW of heat. However, the water temperature in the tank has to be ...
Robert Werner's user avatar
0 votes
0 answers
16 views

For a given a molten metal (say copper), how do you determine the best material for a 3D printer flatbed? What about circuit board?

Suppose we had a 3D printer that can spew molten metal out of a 0.1mm hot nozzle and that we can control the heat at the last 5mm of the Tungsten hot nozzle's tip. I'm wondering then how would you get ...
Daniel Donnelly's user avatar
0 votes
0 answers
30 views

Determine Heating costs in $/kWh for a specific location

Suppose I wanted to find the average heating price for a specific location in the US, where: heating_price: The price of equivalent unit energy intensity of heating energy source (e.g. natural gas), ...
Jebathon's user avatar
  • 113
0 votes
0 answers
44 views

What should length of copper coil be to heat fluid from Temp A to Temp B?

I'm building a milk pasteuriser. The milk in the cooling tank has a starting temperature of 4°C. It should then be heated to 72°C for 30 sec, then cooled back down again to 4°C as ...
ljc's user avatar
  • 109
0 votes
0 answers
13 views

How to connect to heating networks both with sources and consumers into one network?

We need to connect two distinct heating networks on a wastewater treatment plant into one. So far I've only seen heating networks with one central heat source or one central manifold that all heat ...
mart's user avatar
  • 4,781
0 votes
0 answers
44 views

Are there any books which show how to design electrical coil heat exchangers?

I need to design an electrically powered gas heater, but i need to do so in detail. I'm looking for a guide similar to the shell and tube heat exchanger design guide in coulson and richardson's ...
user20934's user avatar
0 votes
0 answers
45 views

Can radiant induction heat thermally decompose wood

Is it possible to thermally decompose an indicator like wood in a induction heating container made of stainless steel if the induction frequency is low enough to heat the container about 1000°c. ...
Theboyboy's user avatar
-1 votes
1 answer
55 views

heat accumulation tank: hot water IN from top or bottom?

should heated water from a wood boiler enter a vertical cylindrical heat accumulation tank from the top or the bottom? mine goes in from the top and can barely achieve more than 60C, whilst the boiler ...
allanlaal's user avatar
  • 213