Screw type water source gas engine-driven heat pump water chiller/heater unit and operation method

Abstract

The invention discloses a screw type water source gas engine-driven heat pump water chiller / heater unit. The water chiller / heater unit comprises a power system, an engine waste heat recovery system, arefrigerant system and an oil return system, wherein the power system, the engine waste heat recovery system, the refrigerant system and the oil return system are connected through pipelines. According to the water chiller / heater unit, in the operation process of a heating mode, a refrigerant extracts heat from waste water through a dry type evaporator, and waste heat of a gas engine is combinedto supply hot water; and in the operation process of a chilling mode, chilled water and domestic hot water can be supplied simultaneously, high energy utilization efficiency is achieved in the chilling and heating modes, and the defect that a traditional water source heat pump unit is low in energy utilization rate in the chilling process can be overcome. The water chiller / heater unit has the beneficial effects that the applicability is high, the requirements of energy policies of the current low-carbon economy are met, and the social benefit is obvious.

Description

technical field [0001] The invention relates to the technical field of screw type heat pump unit for producing cold and hot water for air conditioning and domestic hot water, in particular to a screw type water source gas engine heat pump cold water unit with a gas engine as the driving force. Background technique [0002] At present, with the continuous maturity of gas engine heat pump technology, gas engine heat pump systems have been widely used in the field of refrigeration and heating. Compared with the traditional electric heat pump system, the gas engine heat pump system has the following advantages: (1) clean energy such as natural gas and petroleum gas is used as the energy source of the unit, which reduces the use of power resources and meets the technical requirements of energy saving and low carbon; (2) the unit During operation, a large amount of waste heat of the gas engine can be recycled again, and the utilization rate of primary energy is greatly improved; (...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing gas engine heat pump systems use a gas engine to drive the air source heat pump system, and its performance is greatly affected by the ambient temperature. At a certain value, it cannot even be started. In addition, the finned heat exchanger used in the air source heat pump can only exchange heat with the air, and cannot use low-level heat sources such as domestic wastewater and industrial wastewater.

[0004] The existing screw-type gas-fired chiller is used to supply chilled water to the air-conditioning system. Its structure is simple, and it has a certain peak-shaving capability during the period of heavy electricity load in summer. Recovery of gas engine waste heat, low energy utilization efficiency

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