Main Page - Revision history

E.dada: Marked this version for translation

2026-10-13T09:40:06Z

Marked this version for translation

← Older revision		Revision as of 10:40, 13 October 2026
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	{{Webp\|Crankcooler\|1200}}		{{Webp\|Crankcooler\|1200}}

			<!--T:98-->
	It can be regarded as a variant of the closed-cycle [https://en.wikipedia.org/wiki/Ericsson_cycle Ericsson engine] without a regenerator. Its distinctions lies in the specifically arranged kinematics, and hydraulic architecture. Each cylinder has a dominant role during the cycle, but the other piston may assist during compression or expansion, allowing both swept volumes to contribute to the pressure-changing phases. Passive valves do not separate heat exchangers from the cylinders, compressions and expansions act on the whole system.		It can be regarded as a variant of the closed-cycle [https://en.wikipedia.org/wiki/Ericsson_cycle Ericsson engine] without a regenerator. Its distinctions lies in the specifically arranged kinematics, and hydraulic architecture. Each cylinder has a dominant role during the cycle, but the other piston may assist during compression or expansion, allowing both swept volumes to contribute to the pressure-changing phases. Passive valves do not separate heat exchangers from the cylinders, compressions and expansions act on the whole system.

			<!--T:99-->
	During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.		During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.

Line 20:		Line 22:
	Heat exchangers are a key component of this machine, they must provide maximum heat transfer surface area relative to internal volume, while minimising pressure drops. Although only microtubes have been studied so far, microchannel heat exchangers are a promising avenue to explore, particularly if they can act as a valve by adopting a Tesla valve profile.		Heat exchangers are a key component of this machine, they must provide maximum heat transfer surface area relative to internal volume, while minimising pressure drops. Although only microtubes have been studied so far, microchannel heat exchangers are a promising avenue to explore, particularly if they can act as a valve by adopting a Tesla valve profile.

			<!--T:100-->
	The cylinders and pistons are made from a material with low thermal conductivity. The piston kinematics can be done using various methods, achieving maximum efficiency requires a complex motion which can be accurately approximated using a 6-bar linkage, while a simple crank-connecting rod system will allow operation at reduced efficiency. For refrigeration applications, numerous mechanisms are possible, such as cams, actuators, solenoids, liquid pistons, etc.		The cylinders and pistons are made from a material with low thermal conductivity. The piston kinematics can be done using various methods, achieving maximum efficiency requires a complex motion which can be accurately approximated using a 6-bar linkage, while a simple crank-connecting rod system will allow operation at reduced efficiency. For refrigeration applications, numerous mechanisms are possible, such as cams, actuators, solenoids, liquid pistons, etc.

E.dada at 09:38, 13 October 2026

2026-10-13T09:38:42Z

← Older revision		Revision as of 10:38, 13 October 2026
Line 10:		Line 10:
	{{Webp\|Crankcooler\|1200}}		{{Webp\|Crankcooler\|1200}}

	It can be regarded as a variant of the closed-cycle [https://en.wikipedia.org/wiki/Ericsson_cycle Ericsson engine] without a regenerator. Its distinctions lies in the specifically arranged kinematics, and hydraulic architecture. Each cylinder has a dominant role during the cycle, but the other piston may assist during compression or expansion, allowing both swept volumes to contribute to the pressure-changing phases. Passive valves do not separate heat exchangers from the cylinders, compressions and expansions act on ~~entier~~ system.		It can be regarded as a variant of the closed-cycle [https://en.wikipedia.org/wiki/Ericsson_cycle Ericsson engine] without a regenerator. Its distinctions lies in the specifically arranged kinematics, and hydraulic architecture. Each cylinder has a dominant role during the cycle, but the other piston may assist during compression or expansion, allowing both swept volumes to contribute to the pressure-changing phases. Passive valves do not separate heat exchangers from the cylinders, compressions and expansions act on the whole system.

	During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.		During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.
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	<!--T:79-->		<!--T:79-->
	Heat exchangers are a key component of this machine, they must provide maximum heat transfer surface area relative to internal volume, while minimising pressure drops. Although only microtubes have been studied so far, microchannel heat exchangers are a promising avenue to explore, particularly if they can act as a valve by adopting a Tesla valve profile. The cylinders and pistons are made from a material with low thermal conductivity. The piston kinematics can be ~~achieved~~ using various methods, achieving maximum efficiency requires a complex motion which can be accurately approximated using a 6-bar linkage, while a simple crank-connecting rod system will allow operation at reduced efficiency. For refrigeration applications, numerous mechanisms are possible, such as cams, actuators, solenoids, liquid pistons, etc.		Heat exchangers are a key component of this machine, they must provide maximum heat transfer surface area relative to internal volume, while minimising pressure drops. Although only microtubes have been studied so far, microchannel heat exchangers are a promising avenue to explore, particularly if they can act as a valve by adopting a Tesla valve profile.

			The cylinders and pistons are made from a material with low thermal conductivity. The piston kinematics can be done using various methods, achieving maximum efficiency requires a complex motion which can be accurately approximated using a 6-bar linkage, while a simple crank-connecting rod system will allow operation at reduced efficiency. For refrigeration applications, numerous mechanisms are possible, such as cams, actuators, solenoids, liquid pistons, etc.

	<!--T:80-->		<!--T:80-->
	There still exist no prototype of the Dada engine. A comprehensive [[Thermodynamic_and_Mechanical_Study\|thermodynamic and mechanical study]] has been carried out, which served as the basis for the design of a [[Dada_Engine_Solver\|0D simulator]]. This is an open-source project, any help is welcome.		There still exist no prototype of the Dada engine. A comprehensive [[Thermodynamic_and_Mechanical_Study\|thermodynamic and mechanical study]] has been carried out, which served as the basis for the design of a [[Dada_Engine_Solver\|0D simulator]]. This is a free open-source project, any help is welcome.

	==Motor cycle== <!--T:81-->		==Motor cycle== <!--T:81-->

E.dada at 09:30, 13 October 2026

2026-10-13T09:30:34Z

← Older revision		Revision as of 10:30, 13 October 2026
Line 10:		Line 10:
	{{Webp\|Crankcooler\|1200}}		{{Webp\|Crankcooler\|1200}}

	It can be regarded as a variant of the closed-cycle [https://en.wikipedia.org/wiki/Ericsson_cycle\|Ericsson engine] without a regenerator. Its distinctions lies in the specifically arranged kinematics, and hydraulic architecture. Each cylinder has a dominant role during the cycle, but the other piston may assist during compression or expansion, allowing both swept volumes to contribute to the pressure-changing phases. Passive valves do not separate heat exchangers from the cylinders, compressions and expansions act on entier system.		It can be regarded as a variant of the closed-cycle [https://en.wikipedia.org/wiki/Ericsson_cycle Ericsson engine] without a regenerator. Its distinctions lies in the specifically arranged kinematics, and hydraulic architecture. Each cylinder has a dominant role during the cycle, but the other piston may assist during compression or expansion, allowing both swept volumes to contribute to the pressure-changing phases. Passive valves do not separate heat exchangers from the cylinders, compressions and expansions act on entier system.

	During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.		During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.

	<!--T:78-->		<!--T:78-->

E.dada at 09:29, 13 October 2026

2026-10-13T09:29:28Z

← Older revision		Revision as of 10:29, 13 October 2026
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	<!--T:77-->		<!--T:77-->
	{{Webp\|Crankcooler\|1200}}		{{Webp\|Crankcooler\|1200}}

			It can be regarded as a variant of the closed-cycle [https://en.wikipedia.org/wiki/Ericsson_cycle\|Ericsson engine] without a regenerator. Its distinctions lies in the specifically arranged kinematics, and hydraulic architecture. Each cylinder has a dominant role during the cycle, but the other piston may assist during compression or expansion, allowing both swept volumes to contribute to the pressure-changing phases. Passive valves do not separate heat exchangers from the cylinders, compressions and expansions act on entier system.

			During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.

	<!--T:78-->		<!--T:78-->
	On a similar principle, the [https://en.wikipedia.org/wiki/Stirling_engine Stirling engine], which has been in existence for two centuries, carries out heat transfer within the cylinders; the idea here is to transfer heat as the gas passes from one cylinder to another. During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.		On a slightly similar principle, the [https://en.wikipedia.org/wiki/Stirling_engine Stirling engine], which has been in existence for two centuries, carries out heat transfer within the cylinders; the idea here is to transfer heat as the gas passes from one cylinder to another.

	<!--T:79-->		<!--T:79-->
	Heat exchangers are a key component of this machine, they must provide maximum heat transfer surface area relative to internal volume, while minimising pressure drops. So far, ~~only microtube~~ heat exchangers ~~have been considered~~. The cylinders and pistons are made from a material with low thermal conductivity. The piston kinematics can be achieved using various methods, achieving maximum efficiency requires a complex motion which can be accurately approximated using a 6-bar linkage, while a simple crank-connecting rod system will allow operation at reduced efficiency. For refrigeration applications, numerous mechanisms are possible, such as cams, actuators, solenoids, etc.		Heat exchangers are a key component of this machine, they must provide maximum heat transfer surface area relative to internal volume, while minimising pressure drops. Although only microtubes have been studied so far, microchannel heat exchangers are a promising avenue to explore, particularly if they can act as a valve by adopting a Tesla valve profile. The cylinders and pistons are made from a material with low thermal conductivity. The piston kinematics can be achieved using various methods, achieving maximum efficiency requires a complex motion which can be accurately approximated using a 6-bar linkage, while a simple crank-connecting rod system will allow operation at reduced efficiency. For refrigeration applications, numerous mechanisms are possible, such as cams, actuators, solenoids, liquid pistons, etc.

	<!--T:80-->		<!--T:80-->

E.dada at 01:42, 11 October 2026

2026-10-11T01:42:08Z

← Older revision		Revision as of 02:42, 11 October 2026
Line 73:		Line 73:

	<!--T:97-->		<!--T:97-->
	Based on the equations established in this study, a 0D simulator was developed in Python (entirely by AI, including documentation) in order to determine the optimal dimensions and parameters of this machine in various configurations: [[Dada_Engine_Solver]]. I used it to size a cooling cell using air as working gas, powered by a pedal mechanism. I hope to size an air small demonstrator engine in the coming weeks, followed by a heat pump and a motor using helium as working gas.		Based on the equations established in this study, a 0D simulator was developed in Python (entirely by AI, including documentation) in order to determine the optimal dimensions and parameters of this machine in various configurations: [[Dada_Engine_Solver]]. I used it to size a [[Pedal_Cooling_Cell\|cooling cell]] using air as working gas, powered by a pedal mechanism. I hope to size an air small demonstrator engine in the coming weeks, followed by a heat pump and a motor using helium as working gas.

	== Is it free? == <!--T:66-->		== Is it free? == <!--T:66-->

E.dada at 17:27, 10 October 2026

2026-10-10T17:27:37Z

← Older revision		Revision as of 18:27, 10 October 2026
Line 5:		Line 5:

	<!--T:76-->		<!--T:76-->
	The Dada engine is a dual-mode operation heat engine which moves a working gas in a closed circuit between two cylinders of different volumes, via two heat exchangers selected by passive valves, so as to approach a [[https://en.wikipedia.org/wiki/Brayton_cycle Brayton/Joule cycle]]. It can function either as an external heat engine or as a heat pump, refrigerator. The working gas may be inert: helium, nitrogen or air.		The Dada engine is a dual-mode operation heat engine which moves a working gas in a closed circuit between two cylinders of different volumes, via two heat exchangers selected by passive valves, so as to approach a [https://en.wikipedia.org/wiki/Brayton_cycle Brayton/Joule cycle]. It can function either as an external heat engine or as a heat pump, refrigerator. The working gas may be inert: helium, nitrogen or air.

	<!--T:77-->		<!--T:77-->

E.dada at 17:24, 10 October 2026

2026-10-10T17:24:56Z

← Older revision		Revision as of 18:24, 10 October 2026
Line 5:		Line 5:

	<!--T:76-->		<!--T:76-->
	The Dada engine is a dual-mode operation heat engine which moves a working gas in a closed circuit between two cylinders of different volumes, via two heat exchangers selected by passive valves, so as to approach a Brayton/Joule cycle. It can function either as an external heat engine or as a heat pump, refrigerator. The working gas may be inert: helium, nitrogen or air.		The Dada engine is a dual-mode operation heat engine which moves a working gas in a closed circuit between two cylinders of different volumes, via two heat exchangers selected by passive valves, so as to approach a [[https://en.wikipedia.org/wiki/Brayton_cycle Brayton/Joule cycle]]. It can function either as an external heat engine or as a heat pump, refrigerator. The working gas may be inert: helium, nitrogen or air.

	<!--T:77-->		<!--T:77-->
Line 17:		Line 17:

	<!--T:80-->		<!--T:80-->
	There still exist no prototype of the Dada engine. A comprehensive [[Thermodynamic_and_Mechanical_Study\|thermodynamic and mechanical study]] has been carried out, which served as the basis for the design of a [[0D simulator]]. This is an open-source project, any help is welcome.		There still exist no prototype of the Dada engine. A comprehensive [[Thermodynamic_and_Mechanical_Study\|thermodynamic and mechanical study]] has been carried out, which served as the basis for the design of a [[Dada_Engine_Solver\|0D simulator]]. This is an open-source project, any help is welcome.

	==Motor cycle== <!--T:81-->		==Motor cycle== <!--T:81-->

E.dada: Marked this version for translation

2026-10-10T16:57:52Z

Marked this version for translation

← Older revision		Revision as of 17:57, 10 October 2026
Line 2:		Line 2:
	__NOTOC__		__NOTOC__
	<translate>		<translate>
	==Presentation==		==Presentation== <!--T:75-->

			<!--T:76-->
	The Dada engine is a dual-mode operation heat engine which moves a working gas in a closed circuit between two cylinders of different volumes, via two heat exchangers selected by passive valves, so as to approach a Brayton/Joule cycle. It can function either as an external heat engine or as a heat pump, refrigerator. The working gas may be inert: helium, nitrogen or air.		The Dada engine is a dual-mode operation heat engine which moves a working gas in a closed circuit between two cylinders of different volumes, via two heat exchangers selected by passive valves, so as to approach a Brayton/Joule cycle. It can function either as an external heat engine or as a heat pump, refrigerator. The working gas may be inert: helium, nitrogen or air.

			<!--T:77-->
	{{Webp\|Crankcooler\|1200}}		{{Webp\|Crankcooler\|1200}}

			<!--T:78-->
	On a similar principle, the [https://en.wikipedia.org/wiki/Stirling_engine Stirling engine], which has been in existence for two centuries, carries out heat transfer within the cylinders; the idea here is to transfer heat as the gas passes from one cylinder to another. During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.		On a similar principle, the [https://en.wikipedia.org/wiki/Stirling_engine Stirling engine], which has been in existence for two centuries, carries out heat transfer within the cylinders; the idea here is to transfer heat as the gas passes from one cylinder to another. During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.

			<!--T:79-->
	Heat exchangers are a key component of this machine, they must provide maximum heat transfer surface area relative to internal volume, while minimising pressure drops. So far, only microtube heat exchangers have been considered. The cylinders and pistons are made from a material with low thermal conductivity. The piston kinematics can be achieved using various methods, achieving maximum efficiency requires a complex motion which can be accurately approximated using a 6-bar linkage, while a simple crank-connecting rod system will allow operation at reduced efficiency. For refrigeration applications, numerous mechanisms are possible, such as cams, actuators, solenoids, etc.		Heat exchangers are a key component of this machine, they must provide maximum heat transfer surface area relative to internal volume, while minimising pressure drops. So far, only microtube heat exchangers have been considered. The cylinders and pistons are made from a material with low thermal conductivity. The piston kinematics can be achieved using various methods, achieving maximum efficiency requires a complex motion which can be accurately approximated using a 6-bar linkage, while a simple crank-connecting rod system will allow operation at reduced efficiency. For refrigeration applications, numerous mechanisms are possible, such as cams, actuators, solenoids, etc.

			<!--T:80-->
	There still exist no prototype of the Dada engine. A comprehensive [[Thermodynamic_and_Mechanical_Study\|thermodynamic and mechanical study]] has been carried out, which served as the basis for the design of a [[0D simulator]]. This is an open-source project, any help is welcome.		There still exist no prototype of the Dada engine. A comprehensive [[Thermodynamic_and_Mechanical_Study\|thermodynamic and mechanical study]] has been carried out, which served as the basis for the design of a [[0D simulator]]. This is an open-source project, any help is welcome.

	==Motor cycle==		==Motor cycle== <!--T:81-->

			<!--T:82-->
	{{Webp\|Motor cycle\|640}}		{{Webp\|Motor cycle\|640}}

			<!--T:83-->
	===Phase I — low-pressure heat exchange, ideally isobaric===		===Phase I — low-pressure heat exchange, ideally isobaric===
	Almost all of the gas is transferred from the large cylinder to the small cylinder via the cold heat exchanger, heat is extracted from gas, causing its volume and temperature to decrease.		Almost all of the gas is transferred from the large cylinder to the small cylinder via the cold heat exchanger, heat is extracted from gas, causing its volume and temperature to decrease.

			<!--T:84-->
	===Phase II — Compression, ideally adiabatic===		===Phase II — Compression, ideally adiabatic===
	The large cylinder closes completely, the small cylinder compresses the gas, causing its volume to decrease while its pressure and temperature increase.		The large cylinder closes completely, the small cylinder compresses the gas, causing its volume to decrease while its pressure and temperature increase.

			<!--T:85-->
	===Phase III — High-pressure heat exchange, ideally isobaric===		===Phase III — High-pressure heat exchange, ideally isobaric===
	All of the gas is transferred from the small cylinder to the large cylinder via the hot heat exchanger, it absorbs heat, causing its volume and temperature to increase.		All of the gas is transferred from the small cylinder to the large cylinder via the hot heat exchanger, it absorbs heat, causing its volume and temperature to increase.

			<!--T:86-->
	===Phase IV — Expansion, ideally adiabatic===		===Phase IV — Expansion, ideally adiabatic===
	The large cylinder opens fully, the small cylinder participates in the expansion and opens slightly, the volume of the gas increases, while the pressure and temperature decrease.		The large cylinder opens fully, the small cylinder participates in the expansion and opens slightly, the volume of the gas increases, while the pressure and temperature decrease.

	==Receiver cycle (heat pump, refrigerator)==		==Receiver cycle (heat pump, refrigerator)== <!--T:87-->

			<!--T:88-->
	{{Webp\|Receiver cycle\|640}}		{{Webp\|Receiver cycle\|640}}

			<!--T:89-->
	===Phase I — Compression, ideally adiabatic===		===Phase I — Compression, ideally adiabatic===
	The small cylinder closes completely, the large cylinder closes partially, the volume decreases, while the pressure and temperature increase.		The small cylinder closes completely, the large cylinder closes partially, the volume decreases, while the pressure and temperature increase.

			<!--T:90-->
	===Phase II — High-pressure heat exchange, ideally isobaric===		===Phase II — High-pressure heat exchange, ideally isobaric===
	All the gas is transferred from the large cylinder to the small cylinder via the hot heat exchanger, the gas releases heat there, its volume and temperature decrease.		All the gas is transferred from the large cylinder to the small cylinder via the hot heat exchanger, the gas releases heat there, its volume and temperature decrease.

			<!--T:91-->
	===Phase III — Expansion, ideally adiabatic===		===Phase III — Expansion, ideally adiabatic===
	The small cylinder opens fully, the large cylinder participates in the expansion and opens slightly, the volume of the gas increases, while pressure and temperature decrease.		The small cylinder opens fully, the large cylinder participates in the expansion and opens slightly, the volume of the gas increases, while pressure and temperature decrease.

			<!--T:92-->
	===Phase IV — low-pressure heat exchange, ideally isobaric===		===Phase IV — low-pressure heat exchange, ideally isobaric===
	Almost all of the gas is transferred from the small cylinder to the large cylinder via the cold heat exchanger, the gas absorbs heat there, and its volume and temperature increase.		Almost all of the gas is transferred from the small cylinder to the large cylinder via the cold heat exchanger, the gas absorbs heat there, and its volume and temperature increase.

	==Way to a real machine==		==Way to a real machine== <!--T:93-->

			<!--T:94-->
	In Dada engine, the heat exchangers remain active throughout the cycle, compression and expansion cannot be perfectly adiabatic. In order to minimise irreversibilities, these phases must be brief in relation to the thermal time constants, dead volumes and internal volumes of the heat exchangers will be kept to a minimum.		In Dada engine, the heat exchangers remain active throughout the cycle, compression and expansion cannot be perfectly adiabatic. In order to minimise irreversibilities, these phases must be brief in relation to the thermal time constants, dead volumes and internal volumes of the heat exchangers will be kept to a minimum.

			<!--T:95-->
	Heat transfer through the heat exchangers results in pressure drops, a perfect isobaric process is unachievable. To minimise these losses, the duration of the heat transfer is extended to limit the flow rate, and the heat exchangers must offer as little resistance as possible to the passage of the gas.		Heat transfer through the heat exchangers results in pressure drops, a perfect isobaric process is unachievable. To minimise these losses, the duration of the heat transfer is extended to limit the flow rate, and the heat exchangers must offer as little resistance as possible to the passage of the gas.

			<!--T:96-->
	A comprehensive thermodynamic analysis of the cycle was carried out using extensive AI. I learnt a great deal while writing this, and although I believe this work to be rigorous, it requires an expert review: [[Thermodynamic_and_Mechanical_Study]].		A comprehensive thermodynamic analysis of the cycle was carried out using extensive AI. I learnt a great deal while writing this, and although I believe this work to be rigorous, it requires an expert review: [[Thermodynamic_and_Mechanical_Study]].

			<!--T:97-->
	Based on the equations established in this study, a 0D simulator was developed in Python (entirely by AI, including documentation) in order to determine the optimal dimensions and parameters of this machine in various configurations: [[Dada_Engine_Solver]]. I used it to size a cooling cell using air as working gas, powered by a pedal mechanism. I hope to size an air small demonstrator engine in the coming weeks, followed by a heat pump and a motor using helium as working gas.		Based on the equations established in this study, a 0D simulator was developed in Python (entirely by AI, including documentation) in order to determine the optimal dimensions and parameters of this machine in various configurations: [[Dada_Engine_Solver]]. I used it to size a cooling cell using air as working gas, powered by a pedal mechanism. I hope to size an air small demonstrator engine in the coming weeks, followed by a heat pump and a motor using helium as working gas.

E.dada at 16:56, 10 October 2026

2026-10-10T16:56:58Z

← Older revision		Revision as of 17:56, 10 October 2026
Line 1:		Line 1:
	<languages/>		<languages/>
	__NOTOC__		__NOTOC__
			<translate>
	==Presentation==		==Presentation==

Line 55:		Line 56:
	Based on the equations established in this study, a 0D simulator was developed in Python (entirely by AI, including documentation) in order to determine the optimal dimensions and parameters of this machine in various configurations: [[Dada_Engine_Solver]]. I used it to size a cooling cell using air as working gas, powered by a pedal mechanism. I hope to size an air small demonstrator engine in the coming weeks, followed by a heat pump and a motor using helium as working gas.		Based on the equations established in this study, a 0D simulator was developed in Python (entirely by AI, including documentation) in order to determine the optimal dimensions and parameters of this machine in various configurations: [[Dada_Engine_Solver]]. I used it to size a cooling cell using air as working gas, powered by a pedal mechanism. I hope to size an air small demonstrator engine in the coming weeks, followed by a heat pump and a motor using helium as working gas.

	~~<translate>~~
	== Is it free? == <!--T:66-->		== Is it free? == <!--T:66-->

E.dada at 16:26, 10 October 2026

2026-10-10T16:26:12Z

← Older revision		Revision as of 17:26, 10 October 2026
Line 5:		Line 5:
	The Dada engine is a dual-mode operation heat engine which moves a working gas in a closed circuit between two cylinders of different volumes, via two heat exchangers selected by passive valves, so as to approach a Brayton/Joule cycle. It can function either as an external heat engine or as a heat pump, refrigerator. The working gas may be inert: helium, nitrogen or air.		The Dada engine is a dual-mode operation heat engine which moves a working gas in a closed circuit between two cylinders of different volumes, via two heat exchangers selected by passive valves, so as to approach a Brayton/Joule cycle. It can function either as an external heat engine or as a heat pump, refrigerator. The working gas may be inert: helium, nitrogen or air.

	{{Webp\|Crankcooler~~.webp~~\|1200}}		{{Webp\|Crankcooler\|1200}}

	On a similar principle, the [https://en.wikipedia.org/wiki/Stirling_engine Stirling engine], which has been in existence for two centuries, carries out heat transfer within the cylinders; the idea here is to transfer heat as the gas passes from one cylinder to another. During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.		On a similar principle, the [https://en.wikipedia.org/wiki/Stirling_engine Stirling engine], which has been in existence for two centuries, carries out heat transfer within the cylinders; the idea here is to transfer heat as the gas passes from one cylinder to another. During its cycle, the engine undergoes a compression and an expansion, interspersed with phases of heat exchange that are ideally isobaric. The valves determine the direction of flow through the heat exchangers. Between the end of compression and the start of expansion, all of the gas passes through the hot heat exchanger. During expansion and until the start of compression, all of the gas passes through the cold heat exchanger.
Line 15:		Line 15:
	==Motor cycle==		==Motor cycle==

	{{Webp\|~~File:~~Motor cycle~~.webp\|~~\|640}}		{{Webp\|Motor cycle\|640}}

	===Phase I — low-pressure heat exchange, ideally isobaric===		===Phase I — low-pressure heat exchange, ideally isobaric===
Line 31:		Line 31:
	==Receiver cycle (heat pump, refrigerator)==		==Receiver cycle (heat pump, refrigerator)==

	{{Webp\|Receiver cycle~~.webp~~\|640}}		{{Webp\|Receiver cycle\|640}}

	===Phase I — Compression, ideally adiabatic===		===Phase I — Compression, ideally adiabatic===