Hybrid heat pump / refrigerator with magnetic cooling stage

Inactive Publication Date: 2007-08-16
BRUKER BIOSPIN
View PDF18 Cites 47 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0030]The regenerative cyclic process moreover includes the heat supply phase and the compression phase with a high magnetic field in the magnetocaloric material, the phase of heat release and expansion phase with a low magnetic field in the magnetocaloric material. In this fashion, the method permits both a regenerative and a magnetocaloric working cycle in one single device, which provides an associated machine having high power and efficiency.
[0031]The inventive method is essentially advantageous when the heat is transported within a superconducting magnet configuration, wherein the supercondu

Problems solved by technology

Since there are always two independent cooling mechanisms in the conventional devices of this type, the apparative expense is relatively large.
An external magnetic field is thereby undesired in thi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hybrid heat pump / refrigerator with magnetic cooling stage
  • Hybrid heat pump / refrigerator with magnetic cooling stage
  • Hybrid heat pump / refrigerator with magnetic cooling stage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046]FIG. 1a schematically shows the structure of a (one-stage) regenerative Stirling gas refrigerator (or heat pump) according to prior art. The Stirling machine represents the basic form of all machines which are based on a regenerative cycle. The other gas refrigerators, such as Gifford-McMahon coolers or pulse tube coolers, are derived from this basic form.

[0047]The machine consists of a heat storage medium, a so-called (passive) regenerator 1 which is limited at its warm end 2 by a warm heat exchanger 3 (for a refrigerator approximately at ambient temperature) and is limited at its cold end 2′ by a cold heat exchanger 3′ (for a refrigerator below ambient temperature). The regenerator 1 consists of a finely distributed solid, e.g. in the form of woven metal screens or bulk particles, and has a high heat capacity compared to the working fluid, e.g. helium gas. The regenerator 1 absorbs heat from the working fluid during passage, and releases it after flow reversal to the working...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A device for transporting heat from a cold reservoir to a warm reservoir, in which at least two cyclic processes are employed for transporting heat thereby absorbing work, of which at least one is a regenerative cyclic process, and at least one is a magnetocaloric cyclic process, wherein the regenerative cyclic process has a working fluid and a heat storage medium, is characterized in that the heat storage medium of the regenerative cyclic process comprises a magnetocaloric material for the magnetocaloric cyclic process, wherein the magnetocaloric material is in a regenerator area with a cold end and a warm end, the working fluid of the regenerative cyclic process additionally serving as a heat transfer fluid for the magnetocaloric cyclic process. This produces a compact device with low apparative expense, wherein the power density and also the efficiency of the device are increased. The device may advantageously be used for cooling a superconducting magnet configuration.

Description

[0001]This application claims Paris Convention priority of DE 10 2006 006 326.0 filed Feb. 11, 2006 the complete disclosure of which is hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]The invention concerns a device for transporting heat from a cold reservoir to a warm reservoir, in which at least two cyclic processes are employed for transporting heat, thereby absorbing work, of which at least one is a regenerative cyclic process, and at least one is a magnetocaloric cyclic process, wherein a working fluid and a heat storage medium are provided for the regenerative cyclic process.[0003]A device of this type has been disclosed in the document “A multi-stage continuous-duty adiabatic demagnetization refrigerator” (P. J. Shirron et al., Adv. Cry. Eng., Vol. 45B, page 1629). It combines a regenerative, cyclic gas refrigeration process with magnetic cooling by using a Gifford-McMahon gas refrigerator for precooling several, series-connected magnetic cold stages in orde...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F25B21/00F25B7/00
CPCF25B9/10F25B9/14F25B9/145F25B21/00Y02B30/52F25B2309/003F25B2321/0021Y02B30/66F25B25/00Y02B30/00
Inventor SCHAUWECKER, ROBERTBOESEL, JOHANNES
Owner BRUKER BIOSPIN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap