System for warming methane tank by ground source/air source heat pump and control method

An air source heat pump and ground source heat pump technology, applied in the field of energy saving, can solve the problem of no relatively economical, reasonable, energy-saving and environmentally friendly heating method, and achieve the effects of simple structure, low energy consumption and simple operation

Inactive Publication Date: 2011-02-16
TONGJI UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above heating methods have their own advantages and disadvantages, but starting from the reality of medium-scale farm wastewater treatment projects, there is currently no more economical, reasonable, energy-saving and environmentally friendly heating method

Method used

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  • System for warming methane tank by ground source/air source heat pump and control method
  • System for warming methane tank by ground source/air source heat pump and control method
  • System for warming methane tank by ground source/air source heat pump and control method

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Embodiment 1

[0022] Embodiment 1: as Figure 1-Figure 2 As shown, the system is composed of an underground loop 10, air cooling equipment 9, ground source / air source heat pump common units and a control system. The control parameter collection part in the control system includes an ambient temperature sensor 11, an average soil temperature sensor The outlet water temperature sensor 13 of the source heat pump unit, the inlet water temperature sensor 14 of the ground source heat pump unit and the biogas tank temperature sensor 15 are all DS18B20 temperature sensors to collect temperature signals. The temperature control part of the biogas tank in the control system is composed of a signal generator, an actuator, a single-chip microcomputer 25 and a computer 26. The single-chip microcomputer 25 and the computer 26 are connected by an R232 interface signal line, and the rest are directly connected by signal lines to realize automatic control. The underground loop 10 is a buried pipe and some v...

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Abstract

The invention belongs to the field of energy conservation and in particular relates to a system for warming a methane tank by a ground source / air source heat pump and a control method. The system consists of an underground loop, air cooling equipment, a ground source / air source heat pump public unit and a control system. The control method comprises that: when the outdoor average temperature is below 20 DEG C for ten days successively, a ground source heat pump unit is started for heat exchange; when the outdoor temperature is higher than 20 DEG C for ten days successively, an air source heat pump unit is started for heat exchange; when the temperature in the methane tank is reduced to below 35 DEG C, the ground source / air source heat pump unit is automatically started and transfers the heat of the underground water into hot water in a heating coil in the methane tank by consuming electric energy; and when the water inlet and outlet temperature difference of the ground source / air source heat pump unit is 7.5 DEG C and the temperature of the methane tank is 35 DEG C, the ground source / air source heat pump unit automatically stops working. Medium-scale fermentation engineering is taken as an object, and a novel warming system for improving the utilization rate of the energy and reducing construction cost on the premise of ensuring methane yield, and a control method are explored; and the method has high energy-saving benefit and good environmental-protection effect.

Description

technical field [0001] The invention belongs to the field of energy saving and relates to ground source heat pump / air source heat pump technology, in particular to a system and control method for heating a methane pool by using a ground source / air source heat pump approach. Background technique [0002] Biogas is a renewable energy suitable for promotion and utilization in rural China. However, the low or no gas production of biogas digesters in cold seasons seriously restricts the use and promotion of biogas in rural areas. The main reason is that the ambient temperature is too low, which reduces the activity of biogas fermentation microorganisms. [0003] Within a certain temperature range, temperature has a positive effect on fermentation efficiency, so reasonable temperature control is very necessary in future biogas projects. Generally, biogas bacteria can ferment in the range of 8-60°C. 10-26°C is the room temperature fermentation zone. Under this temperature condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/38F25B49/02F25B30/06C12M1/107
CPCC12M41/20Y02E50/343C12M23/18C12M41/48C12M41/18C12M21/04Y02E50/30
Inventor 朱洪光石惠娴王韬裴晓梅
Owner TONGJI UNIV
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