Solar energy and sewage source heat pump composite energy utilization system

Abstract

The invention relates to a solar energy and sewage source heat pump combined heating system. A solar water heating system and a sewage source are connected in series with the heated part of a heat pump unit through a low-temperature water tank; the heat pump unit is started at valley electrovalence at night, an evaporating end is heated from the low-temperature water tank, and heat is completely stored by the solar water heating system when working at daytime; when the sewage source heat pump unit works at the valley electrovalence, the sewage source heat pump unit obtains low-grade heat energy from the low-temperature water tank and then releases high-grade heat energy through the heating cycle of the unit; part of the high-grade heat energy is stored in a high-temperature water tank, and the other part of the high-grade heat energy is directly supplied to end equipment for heating. According to the solar energy and sewage source heat pump combined heating system, phase-change materials are added to the high-temperature water tank to enhance the heat storage capacity and heat lag capability of the high-temperature water tank; the end equipment is lower in air supply temperature by adopting a fan coil to enhance the heat supply EER (Energy Efficiency Ratio) of the heat pump unit, so that the initial investment and operating cost of the heat pump unit are reduced; and the heat of the fan coil working at daytime is from the phase-change materials inside the high-temperature water tank and the heat storage amount of water at night.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of primary renewable energy. To be precise, it is a composite energy utilization system of solar energy and sewage source heat pump. Background technique [0002] Energy, environment and sustainable development are the themes of the survival and development of human society in the 21st century. In the field of renewable energy utilization, heat pump technology has the advantages of flexible heating, high energy efficiency ratio, low operation and maintenance costs, short construction period of equipment, less difficulty, and flexible operation control. The construction of the heat exchange station and energy consumption, as well as the consumption of a large amount of primary non-renewable energy during the operation of the system; the solar hot water heating system makes full use of solar energy to heat the heat medium, and the equipment is easy to install and construct, and th...

AI Technical Summary

Problems solved by technology

Therefore, using the solar hot water heating system alone to bear all the heat loads of the building will lead to a large initial investment in system equipment;

[0005] If the sewage source heat pump is used alone to bear all the heat loads of the building for heating, it will increase the initial investment and later operation costs of the heat pump unit, and the SEER and IPLV of the heat pump unit will also change with the sewage water temperature and building heat load Change at any time, so it will virtually increase the power consumption of the heat pump unit

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