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
CN101974420AInactive Publication Date: 2011-02-16TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2011-02-16
Estimated Expiration
Not applicable · inactive patent

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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.
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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

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
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