A cooling and heating system combining solar energy and natural gas

Abstract

The invention discloses a heat and cold system combining solar energy with natural gas. The system comprises a solar thermal collector, a heat accumulation fuel tank, an oil-steam heat exchanger, an oil-water heat exchanger, an absorption refrigerator, and a cooling tower. The system is characterized in that the solar thermal collector is used to heat conduction oil to make temperature rise, the conduction oil in high temperature can enter the oil-steam heat exchanger or the oil-water heat exchanger, generated steam or hot water enters the absorption refrigerator and is used as a driving heat source of the refrigerator, and natural gas is used as a supplemental heat source of the absorption refrigerator to share responsibility of user cool capacity and heat capacity. The system realizes comprehensive utilization of solar energy and natural gas, improves energy utilization efficiency of solar energy, and improves economical efficiency of a solar integrated system.

Description

technical field [0001] The invention relates to the technical field of heating, ventilating and air-conditioning, and is an energy utilization technology integrating a solar heat collection system and an absorption refrigerator system, and is a cooling and heating system in which solar energy and natural gas are complementary. Background technique [0002] Solar energy is a renewable energy source. Solar air-conditioning systems have the characteristics of no pollution, energy saving, environmental protection, and safety. Therefore, in the configuration and selection of building hot water and air-conditioning heating systems, using solar energy to replace conventional energy to drive refrigeration devices can make full use of natural energy. Conditions are of great significance to energy saving and environmental protection. However, solar resources are characterized by instability, discontinuity, and low energy flow density, so there are some problems in using solar energy a...

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Problems solved by technology

[0006] Through the retrieval of prior art documents, it is found that Chinese patent application publication number: 001093363, patent number: 012314692, patent number: 201410174343X, patent number: 2005100233869, patent number: 2008200560997, patent number: 2011101972859, and patent number: 2013101615598 are all proposed to adopt The solar heat collector is used as a heat collecting device to generate hot water to drive the absorption refrigerating machine, which is different from the present invention in that its solar heat collection produces hot water, and the efficiency of driving the absorption refrigerating machine is lower than that of the steam-driven absorption refrigerating machine

[0007] Chinese Patent Application Publication No. Patent No.: 2011201665803, Patent No.: 2012202771166, and Patent No.: 2014100071219 all propose to use trough-type solar concentrators to generate steam to drive absorption refrigerators. The difference from the present invention is the use of linear Fresnel The solar concentrating heat collector is limited by the collector site and has poor adaptability. The second difference from the present invention is that it only generates steam, and cannot generate steam and hot water at the same time, so as to realize simultaneous cooling and heating functions.

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