Domestic heating network active heat exchange system in central heating system

Abstract

The invention discloses a domestic heating network active heat exchange system in a central heating system. The domestic heat supply network active heat exchange system comprises three cycles, that is, a primary water cycle central heating pipe network, a secondary water cycle user heating network and a refrigerating cycle of an ejector heat pump; and hot water of the central heating pipe networkis subjected to stepped cooling utilization by the ejector heat pump, and heat is transferred to a radiator at an end user by an ejector through a refrigerating cycle system, a primary water cycle system and a secondary water cycle system. The domestic heating network active heat exchange system comprises the ejector refrigerating cycle including a heat exchanger. The ejector heat pump technologyis simple, low in cost and reliable, and the mechanism is easy to understand. The domestic heating network active heat exchange system is especially suitable for being applied to a domestic heating network and can achieve active heat transfer from low-temperature primary return water to secondary high-temperature supply water. By means of the technology, consumption of energy which is transmittedand distributed by a water system is remarkably reduced. The temperature is further lowered by 10-15 DEG C, and thus, energy consumption of a water pump can be reduced by 50-60% or so. We can expect to achieve a better energy saving effect based on smaller heat losses of the heating pipe network.

Description

technical field [0001] The invention relates to an active enhanced heat exchange system suitable for a household heat network, in particular to an active heat exchange system for a household heat network in a centralized heating system. Background technique [0002] According to the Ministry of Energy, 30-40% of total energy consumption is used for heating, ventilation and lighting of buildings. The largest proportion of these energy consumptions is the heating demand of buildings. Today, 60% of household heating comes from district heating and combined heat and power plants. Therefore, an efficient central heating system is of great significance in terms of energy saving and greenhouse gas emissions. At present, in today's central heating systems, the annual average supply and return water temperature fluctuations are mostly between 75-100°C and 40-50°C (Frederiksen and Werner, 2013). According to a survey study by Frederiksen and Werner (2013), about 7-10% of the annual...

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Problems solved by technology

[0003] In order to solve the deficiencies and existing problems in the prior art, the present invention provides an active heat exchange system for the household heating network in the central heating system, which solves the problem of low effective utilization of heat energy in the central heating system in the prior art, and improves The problem of high cost of heating performance

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