Heat pump system using waste heat and heat engine-driven vapor compression heat pump system

Patent metadata

Field	Value
Publication number	US-2016003504-A1
Application number	US-201414769066-A
Country	US
Kind code	A1
Filing date	Feb 5, 2014
Priority date	Feb 20, 2013
Publication date	Jan 7, 2016
Grant date	—

Abstract

A heat pump system using waste heat has a compression heat pump circuit that uses the shaft output of a power engine as a power source for a compressor for compressing refrigerant, and an absorption heat pump circuit using waste heat of the power engine as a heat source for a regenerator for heating absorbing liquid, refrigerant vaporized in the compression heat pump circuit is circulated to an absorber of the absorption heat pump circuit, the refrigerant is separated after regenerated by the regenerator, and the separated refrigerant is circulated in the compression heats pump circuit. The absorption heat pump circuit has a reverse pump R in a return pipe for absorbing liquid from the regenerator to the absorber, and the rotation energy of the reverse pump R can be withdrawn by a circulation pump P for the absorbing liquid.

First claim

1 - 19 . (canceled)

20 . A heat pump system using waste heat, comprising:
a compression heat pump circuit using a shaft output of a power engine as a power source for a compressor that compresses refrigerant; and an absorption heat pump circuit using waste heat of the power engine as a heat source for a regenerator that heats absorbing liquid, wherein refrigerant vaporized in the compression heat pump circuit is circulated to an absorber of the absorption heat pump circuit, the refrigerant is separated after regenerated by the regenerator, the separated refrigerant is circulated into the compression heat pump circuit, the absorption heat pump circuit has a reverse pump in a return pipe for the absorbing liquid from the regenerator to the absorber, rotational energy of the reverse pump is enabled to be withdrawn by a circulation pump for the absorbing liquid, the circulation pump and the reverse pump are equipped with a common rotating shaft, and a displacement volume V r of the reverse pump satisfies the following equation with respect to a displacement volume V p of the circulation pump:
V p ×n×ρ p ×x p =V r ×n×ρ r ×x r +m comp

wherein n represents the rotation number of the rotating shaft, ρ p represents the density of absorbing liquid passing through the circulation pump, x p represents the mass concentration of the refrigerant in the absorbing liquid passing through the circulation pump, ρ r represents the density of absorbing liquid passing through the reverse pump, x, represents the mass concentration of refrigerant in the absorbing liquid passing through the reverse pump, and m comp represents the circulation amount of refrigerant in the compression heat pump circuit.

21 . A heat pump system using waste heat, comprising:
a compression heat pump circuit using a shaft output of a power engine as a power source for a compressor that compresses refrigerant; and an absorption heat pump circuit using waste heat of the power engine as a heat source for a regenerator that heats absorbing liquid, wherein refrigerant vaporized in the compression heat pump circuit is circulated to an absorber of the absorption heat pump circuit, the refrigerant is separated after regenerated by the regenerator, the separated refrigerant is circulated into the compression heat pump circuit, the absorption heat pump circuit has a reverse pump in a return pipe for the absorbing liquid from the regenerator to the absorber, rotational energy of the reverse pump is enabled to be withdrawn by a circulation pump for the absorbing liquid, the circulation pump and the reverse pump are equipped with a common rotating shaft, and the circulation pump and/or the reverse pump has a varying mechanism for varying a displacement volume thereof, and the varying mechanism varies the displacement volume of the target pump so as to satisfy the following equation:
V p ×n×ρ p ×x p =V r ×n×ρ r ×x r +m comp

Wherein V p represents the displacement volume of the circulation pump, n represents the rotation number of the rotating shaft, ρ p represents the density of absorbing liquid passing through the circulation pump, x p represents the mass concentration of the refrigerant in the absorbing liquid passing through the circulation pump, V r represents the displacement volume of the reverse pump, ρ r represents the density of absorbing liquid passing through the reverse pump, x r represents the mass concentration of refrigerant in the absorbing liquid passing through the reverse pump, and m comp represents the circulation amount of refrigerant in the compression heat pump circuit.

22 . A heat pump system using waste heat, comprising:
a compression heat pump circuit using a shaft output of a power engine as a power source for a compressor that compresses refrigerant; and an absorption heat pump circuit using waste heat of the power engine as a heat source for a regenerator that heats absorbing liquid, wherein refrigerant vaporized in the compression heat pump circuit is circulated to an absorber of the absorption heat pump circuit, the refrigerant is separated after regenerated by the regenerator, the separated refrigerant is circulated into the compression heat pump circuit, the absorption heat pump circuit has a reverse pump in a return pipe for the absorbing liquid from the regenerator to the absorber, rotational energy of the reverse pump is enabled to be withdrawn by a circulation pump for the absorbing liquid, the circulation pump and the reverse pump are equipped with a common rotating shaft, and The reverse pump is connected to the circulation pump through a transmission that varies the ratio (n p /n r ) of rotation numbers of the circulation pump and the reverse pump so as to satisfy the following equation (2):
V p ×n×ρ p ×x p =V r ×n×ρ r ×x r +m comp

wherein V p represents the displacement volume of the circulation pump, n p represents the rotation number of the circulation pump, ρ p represents the density of absorbing liquid passing through the circulation pump, x p represents the mass concentration of the refrigerant in the absorbing liquid passing through the circulation pump, V r represents the displacement volume of the reverse pump, n r represents the rotation number of the reverse pump, ρ r represents the density of absorbing liquid passing through the reverse pump, x r represents the mass concentration of refrigerant in the absorbing liquid passing through the reverse pump, and m comp represents the circulation amount of refrigerant in the compression heat pump circuit.

23 . A heat pump system using waste heat, comprising:
a compression heat pump circuit using a shaft output of a power engine as a power source for a compressor that compresses refrigerant; and an absorption heat pump circuit using waste heat of the power engine as a heat source for a regenerator that heats absorbing liquid, wherein refrigerant vaporized in the compression heat pump circuit is circulated to an absorber of the absorption heat pump circuit, the refrigerant is separated after regenerated by the regenerator, the separated refrigerant is circulated into the compression heat pump circuit, and a suction-side refrigerant heat withdrawer for performing heat-exchange between refrigerant to be supplied to the compressor and absorbing liquid to be supplied to the regenerator.

24 . The heat pump system using waste heats according to claim 23 , wherein a branch pipe that is branched from an absorbing liquid feeding pipe from the absorber to the regenerator is provided, and the suction-side refrigerant heat withdrawer is provided to the branch pipe.

25 . The heat pump system using waste heat according to claim 23 , wherein a discharge-side refrigerant heat withdrawer for performing heat-exchange between refrigerant discharged from the compressor and absorbing liquid to be supplied to the regenerator is provided.

26 . A heat pump system using waste heat, comprising:
a compression heat pump circuit using a shaft output of a power engine as a power source for a compressor that compresses refrigerant; and an absorption heat pump circuit using waste heat of the power engine as a heat source for a regenerator that heats absorbing liquid, wherein refrigerant vaporized in the compression heat pump circuit is circulated to an absorber of the absorption heat pump circuit, a separator for separating lubrication oil for the compressor and the refrigerant from the absorbing liquid of the absorption heat pump circuit is provided at an exit of the regenerator, the lubrication oil for the compressor and the refrigerant which are separated by the separator are circulated in the compression heat pump cir

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Sakamoto Naoki
• Ishii Takeshi
• Mukaiyama Hiroshi

Classifications

• F25B29/006

  of the sorption type system · CPC title

• F25B27/02

  using waste heat, e.g. from internal-combustion engines · CPC title

• F25B30/06

  characterised by the source of low potential heat · CPC title

• F25B29/003

  of the compression type system · CPC title

• F25B25/02 Primary

  Compression-sorption machines, plants, or systems · CPC title