CN104089435A - Energy saving amount determination method for recycling waste heat of circulating cooling water by means of heat pump - Google Patents

Energy saving amount determination method for recycling waste heat of circulating cooling water by means of heat pump Download PDF

Info

Publication number
CN104089435A
CN104089435A CN201410310146.6A CN201410310146A CN104089435A CN 104089435 A CN104089435 A CN 104089435A CN 201410310146 A CN201410310146 A CN 201410310146A CN 104089435 A CN104089435 A CN 104089435A
Authority
CN
China
Prior art keywords
condenser
cooling water
unit
circulating cooling
heat pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201410310146.6A
Other languages
Chinese (zh)
Other versions
CN104089435B (en
Inventor
张利
周连升
张宇
甘智勇
王建
屈斌
王梓越
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Tianjin Electric Power Co Ltd
State Grid Corp of China SGCC
Original Assignee
State Grid Tianjin Electric Power Co Ltd
State Grid Corp of China SGCC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Tianjin Electric Power Co Ltd, State Grid Corp of China SGCC filed Critical State Grid Tianjin Electric Power Co Ltd
Priority to CN201410310146.6A priority Critical patent/CN104089435B/en
Publication of CN104089435A publication Critical patent/CN104089435A/en
Application granted granted Critical
Publication of CN104089435B publication Critical patent/CN104089435B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Landscapes

  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

本发明涉及一种利用热泵回收循环冷却水余热的节能量确定方法，包括步骤有：(1)热泵从凝汽器循环冷却水中吸收余热量的确定；(2)提升凝汽器压力后机组发电功率减少量的确定；(3)利用热泵回收凝汽器循环冷却水余热节能量的确定。本发明利用吸收式热泵回收凝汽器循环冷却水余热用于加热热网循环水，降低汽轮机的冷源损失，同时增加对外供热量，减少燃煤消耗量，达到节能的目的，本发明通过对系统分析，成功实现对利用热泵回收凝汽器循环冷却水余热节能量的计算，思路严谨、计算科学，对余热的回收效率及余热回收的工艺改进都具有重大意义。

The invention relates to a method for determining energy saving by using a heat pump to recover waste heat of circulating cooling water, comprising the following steps: (1) determining the heat pump absorbing waste heat from the circulating cooling water of a condenser; (2) generating electricity by a unit after increasing the pressure of the condenser Determination of power reduction; (3) Determination of energy saving by using the heat pump to recover the waste heat of the condenser circulating cooling water. The invention uses the absorption heat pump to recover the waste heat of the circulating cooling water of the condenser to heat the circulating water of the heating network, reduce the loss of the cold source of the steam turbine, increase the external heat supply, reduce the consumption of coal, and achieve the purpose of energy saving. For the system analysis, the calculation of the waste heat energy saving by using the heat pump to recover the circulating cooling water of the condenser is successfully realized. The thinking is rigorous and the calculation is scientific. It is of great significance to the recovery efficiency of waste heat and the process improvement of waste heat recovery.

Description

利用热泵回收循环冷却水余热的节能量确定方法Determination method of saving energy by using heat pump to recover waste heat of circulating cooling water

技术领域technical field

本发明属于火力发电节能技术领域，尤其是一种利用热泵回收循环冷却水余热的节能量确定方法。The invention belongs to the technical field of thermal power generation and energy saving, in particular to a method for determining energy saving by using a heat pump to recover waste heat of circulating cooling water.

背景技术Background technique

汽轮机冷源损失是当前火电厂热力系统中最主要的损失之一，占机组总吸热量的40％左右，很大一部分能量由于不能充分利用而白白损失掉。随着企业间竞争的加剧和日趋严格的节能减排及环保要求，进一步降低汽轮机冷源损失，节省燃料消耗，减少污染排放，利用吸收式热泵对汽轮机凝汽器循环冷却水进行余热回收，可以增大机组对外供热量，又能够达到节能减排的目的。但是对于利用吸收式热泵回收凝汽器循环冷却水余热的节能量具体数值尚无成套的计算方法。The loss of the cold source of the steam turbine is one of the most important losses in the thermal power system of the current thermal power plant, accounting for about 40% of the total heat absorbed by the unit, and a large part of the energy is lost in vain because it cannot be fully utilized. With the intensification of competition among enterprises and the increasingly stringent requirements for energy saving, emission reduction and environmental protection, the loss of steam turbine cooling source is further reduced, fuel consumption is saved, and pollution emissions are reduced. Absorption heat pumps are used to recover waste heat from the circulating cooling water of steam turbine condensers. Increasing the external heat supply of the unit can also achieve the purpose of energy saving and emission reduction. However, there is no complete set of calculation methods for the specific value of the energy saving of using the absorption heat pump to recover the waste heat of the circulating cooling water of the condenser.

发明内容Contents of the invention

本发明的目的是针对现有技术的不足，而提出一种利用热泵回收循环冷却水余热的节能量确定方法。The object of the present invention is to address the deficiencies of the prior art and propose a method for determining energy saving by using a heat pump to recover waste heat from circulating cooling water.

本发明解决其技术问题是采取以下技术方案实现的：The present invention solves its technical problem and realizes by taking the following technical solutions:

一种利用热泵回收循环冷却水余热的节能量确定方法，其特征在于包括步骤如下：A method for determining energy saving by using a heat pump to recover waste heat from circulating cooling water, characterized in that it includes the following steps:

(1)热泵从凝汽器循环冷却水中吸收余热量的确定；确定使用的公式为：(1) Determination of the residual heat absorbed by the heat pump from the circulating cooling water of the condenser; the formula used for determination is:

My＝Qin·(Hout-Hin)＝Qin·[f(Pout，Tout)-f(Pin，Tin)]M y =Q in ·(H out −H in )=Q in ·[f(P out , T out )−f(P in , T in )]

式中：My为热泵从凝汽器循环冷却水中吸收的余热量，kW；Qin为凝汽器循环冷却水供水流量，t/h，在系统中Qin＝Qout；Hout为凝汽器循环冷却水回水焓值，kJ/kg，可以通过其压力Pout和温度Tout查表得到；Hin为凝汽器循环冷却水供水焓值，kJ/kg，可以通过其压力Pin和温度Tin查表得到；In the formula: M y is the waste heat absorbed by the heat pump from the circulating cooling water of the condenser, kW; Q in is the supply flow rate of the circulating cooling water of the condenser, t/h, Q in = Q out in the system; H out is the The enthalpy value of the return water of the circulating cooling water of the condenser, kJ/kg, can be obtained through its pressure P out and temperature T out ; H in is the enthalpy value of the circulating cooling water of the condenser, kJ/kg, which can be obtained through its pressure P out in and temperature T in are obtained by looking up the table;

(2)提升凝汽器压力后机组发电功率减少量的确定；确定公式为：(2) Determination of the reduction in generating power of the unit after increasing the condenser pressure; the determination formula is:

ΔN＝N×(P1-P0)×ηΔN=N×(P 1 -P 0 )×η

式中：ΔN为提升凝汽器压力后机组发电功率减少量，kW；N为机组发电机功率，kW；P1为提升后的凝汽器压力，kPa；P0为正常运行时的凝汽器压力，kPa；η为凝汽器压力变化对机组发电机功率影响的修正系数，％/kPa；In the formula: ΔN is the reduction of generating power of the unit after increasing the condenser pressure, kW; N is the generator power of the unit, kW; P 1 is the increased condenser pressure, kPa; P 0 is the condensate during normal operation Condenser pressure, kPa; η is the correction coefficient for the influence of condenser pressure change on unit generator power, %/kPa;

(3)利用热泵回收凝汽器循环冷却水余热节能量的确定，确定公式为：(3) Determination of energy saving by using the heat pump to recover the waste heat of the condenser circulating cooling water, the determination formula is:

G＝(My×κ-ΔN×τ)×hG=(M y ×κ-ΔN×τ)×h

其中，利用热泵回收凝汽器循环冷却水余热节能量以标准煤的形式表示，Among them, the energy saved by using the heat pump to recover the waste heat of the condenser circulating cooling water is expressed in the form of standard coal,

式中：G为利用热泵回收凝汽器循环冷却水余热节能量，吨/年；κ为机组平均供热煤耗，g/MJ；τ为机组平均供电煤耗，g/(kW.h)；h为机组年运行小时数，小时。In the formula: G is the energy saved by using the heat pump to recover the waste heat of the circulating cooling water of the condenser, tons/year; κ is the average heating coal consumption of the unit, g/MJ; τ is the average power supply coal consumption of the unit, g/(kW.h); h It is the annual operating hours of the unit, in hours.

而且，所述步骤(1)公式中各数据量均来自于统计时间段内机组DCS系统数据。Moreover, each amount of data in the formula of step (1) comes from the data of the unit DCS system within the statistical time period.

而且，所述步骤(2)公式中各数据量的来源分别为：And, the sources of each data amount in the described step (2) formula are respectively:

①机组发电机功率N来自于统计时间段内机组DCS系统数据；① Generator power N of the unit comes from the data of the DCS system of the unit within the statistical period;

②提升后的凝汽器压力P1来自于统计时间段内机组DCS系统数据；②The increased condenser pressure P 1 comes from the unit DCS system data within the statistical period;

③正常运行时的凝汽器压力P0来自于机组历史运行数据；③Condenser pressure P 0 during normal operation comes from the historical operating data of the unit;

④凝汽器压力变化对机组发电机功率影响的修正系数η来自于机组设计说明书。④ The correction coefficient η of the influence of the condenser pressure change on the generator power of the unit comes from the design specification of the unit.

而且，所述步骤(3)公式中各数据量的来源分别为：And, the source of each amount of data in the described step (3) formula is respectively:

①机组平均供热煤耗κ为历史统计数据；① The unit average heating coal consumption κ is historical statistical data;

②机组平均供电煤耗τ为历史统计数据；② The average power supply coal consumption τ of the unit is historical statistical data;

③机组年运行小时数h为历史统计数据。③ The annual operating hours of the unit h are historical statistical data.

本发明的优点和积极效果是：Advantage and positive effect of the present invention are:

本发明利用吸收式热泵回收凝汽器循环冷却水余热用于加热热网循环水，降低汽轮机的冷源损失，同时增加对外供热量，减少燃煤消耗量，达到节能的目的。本发明通过对系统分析，成功实现对利用热泵回收凝汽器循环冷却水余热节能量的计算，思路严谨、计算科学，对余热的回收效率及余热回收的工艺改进都具有重大意义。The invention utilizes the absorption heat pump to recycle the waste heat of the circulating cooling water of the condenser to heat the circulating water of the heating network, reduce the loss of the cold source of the steam turbine, increase the external heat supply, reduce the coal consumption, and achieve the purpose of energy saving. Through the system analysis, the present invention successfully realizes the calculation of the waste heat energy-saving energy recovered by the heat pump to recover the circulating cooling water of the condenser. The thinking is rigorous and the calculation is scientific, and it is of great significance to the recovery efficiency of waste heat and the process improvement of waste heat recovery.

附图说明Description of drawings

图1是本发明利用热泵回收凝汽器循环冷却水余热系统结构示意图。Fig. 1 is a schematic diagram of the structure of the system for recovering the waste heat of the circulating cooling water of the condenser by using the heat pump according to the present invention.

具体实施方式Detailed ways

以下结合附图对本发明实施做进一步详述，以下实施例只是描述性的，不是限定性的，不能以此限定本发明的保护范围。The implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

一种利用热泵回收循环冷却水余热的节能量确定方法，如图1所示，利用热泵回收凝汽器循环冷却水余热系统包括凝汽器及热泵，该确定方法的步骤如下：A method for determining energy saving by using a heat pump to recover the waste heat of circulating cooling water, as shown in Figure 1, using a heat pump to recover the waste heat of circulating cooling water in a condenser includes a condenser and a heat pump. The steps of the determining method are as follows:

(1)热泵从凝汽器循环冷却水中吸收余热量的确定；确定使用的公式为：(1) Determination of the residual heat absorbed by the heat pump from the circulating cooling water of the condenser; the formula used for determination is:

My＝Qin·(Hout-Hin)＝Qin·[f(Pout，Tout)-f(Pin，Tin)]M y =Q in ·(H out −H in )=Q in ·[f(P out , T out )−f(P in , T in )]

式中：My为热泵从凝汽器循环冷却水中吸收的余热量，kW；Qin为凝汽器循环冷却水供水流量，t/h，如图1所示，在系统中Qin＝Qout(Qout为凝汽器循环冷却水回水流量)；Hout为凝汽器循环冷却水回水焓值，kJ/kg，可以通过其压力Pout和温度Tout查表得到(用函数f(Pout，Tout)表示)；Hin为凝汽器循环冷却水供水焓值，kJ/kg，可以通过其压力Pin和温度Tin查表得到(用函数f(Pin，Tin)表示)，In the formula: M y is the residual heat absorbed by the heat pump from the circulating cooling water of the condenser, kW; Q in is the supply flow rate of the circulating cooling water of the condenser, t/h, as shown in Figure 1, in the system Q in = Q out (Q out is the return water flow rate of the condenser circulating cooling water); H out is the enthalpy value of the condenser circulating cooling water return water, kJ/kg, which can be obtained by looking up the table through its pressure P out and temperature T out (using the function f(P out , T out )); H in is the enthalpy value of the condenser circulating cooling water supply, kJ/kg, which can be obtained by looking up the table through its pressure P in and temperature T in (use the function f(P in , T in ) means),

公式中各数据量的来源分别为：The sources of each data volume in the formula are:

①凝汽器循环冷却水供水流量Qin来自于统计时间段内机组DCS系统数据；① Condenser circulating cooling water supply flow Q in comes from the unit DCS system data within the statistical period;

②凝汽器循环冷却水回水压力Pout来自于统计时间段内机组DCS系统数据；②The return pressure P out of the circulating cooling water of the condenser comes from the data of the DCS system of the unit within the statistical period;

③凝汽器循环冷却水回水温度Tout来自于统计时间段内机组DCS系统数据；③The return temperature T out of the circulating cooling water of the condenser comes from the data of the DCS system of the unit within the statistical period;

④凝汽器循环冷却水供水压力Pin来自于统计时间段内机组DCS系统数据；④ The water supply pressure P in of the circulating cooling water of the condenser comes from the data of the DCS system of the unit within the statistical period;

⑤凝汽器循环冷却水供水温度Tin来自于统计时间段内机组DCS系统数据；⑤ Condenser circulating cooling water supply temperature T in comes from the unit DCS system data within the statistical period;

(2)提升凝汽器压力后机组发电功率减少量的确定；确定公式为：(2) Determination of the reduction in generating power of the unit after increasing the condenser pressure; the determination formula is:

为提高热泵回收凝汽器循环冷却水余热的效益，一般需要采取提高凝汽器压力(机组真空)的方法提高凝汽器循环冷却水回水温度，该措施会在相同工况下降低机组发电机功率，提升凝汽器压力后机组发电功率减少量计算公式如下：In order to improve the efficiency of the heat pump in recovering the waste heat of the circulating cooling water of the condenser, it is generally necessary to increase the pressure of the condenser (unit vacuum) to increase the return temperature of the circulating cooling water of the condenser. This measure will reduce the power generation of the unit under the same working conditions. The calculation formula for the reduction of generating power of the unit after increasing the condenser pressure is as follows:

ΔN＝N×(P1-P0)×ηΔN=N×(P 1 -P 0 )×η

式中：ΔN为提升凝汽器压力后机组发电功率减少量，kW；N为机组发电机功率，kW；P1为提升后的凝汽器压力，kPa；P0为正常运行时的凝汽器压力，kPa；η为凝汽器压力变化对机组发电机功率影响的修正系数，％/kPa。In the formula: ΔN is the reduction of generating power of the unit after increasing the condenser pressure, kW; N is the generator power of the unit, kW; P 1 is the increased condenser pressure, kPa; P 0 is the condensate during normal operation Condenser pressure, kPa; η is the correction coefficient for the influence of condenser pressure change on unit generator power, %/kPa.

公式中各数据量的来源分别为：The sources of each data volume in the formula are:

①机组发电机功率N来自于统计时间段内机组DCS系统数据；① Generator power N of the unit comes from the data of the DCS system of the unit within the statistical period;

②提升后的凝汽器压力P1来自于统计时间段内机组DCS系统数据；②The increased condenser pressure P 1 comes from the unit DCS system data during the statistical period;

③正常运行时的凝汽器压力P0来自于机组历史运行数据；③Condenser pressure P 0 during normal operation comes from the historical operating data of the unit;

④凝汽器压力变化对机组发电机功率影响的修正系数η来自于机组设计说明书。④ The correction coefficient η of the influence of the condenser pressure change on the generator power of the unit comes from the design specification of the unit.

(3)利用热泵回收凝汽器循环冷却水余热节能量的确定，确定公式为：(3) Determination of energy saving by using the heat pump to recover the waste heat of the condenser circulating cooling water, the determination formula is:

本发明中的利用热泵回收凝汽器循环冷却水余热节能量以标准煤的形式表示，In the present invention, the utilization of heat pump to recycle the waste heat and energy saving of condenser circulating cooling water is expressed in the form of standard coal,

G＝(My×κ-ΔN×τ)×hG=(M y ×κ-ΔN×τ)×h

式中：G为利用热泵回收凝汽器循环冷却水余热节能量，吨/年；κ为机组平均供热煤耗，g/MJ；τ为机组平均供电煤耗，g/(kW.h)；h为机组年运行小时数，小时。In the formula: G is the energy saved by using the heat pump to recover the waste heat of the circulating cooling water of the condenser, tons/year; κ is the average heating coal consumption of the unit, g/MJ; τ is the average power supply coal consumption of the unit, g/(kW.h); h It is the annual operating hours of the unit, in hours.

计算公式中各数据量的来源分别为：The sources of each data volume in the calculation formula are:

①机组平均供热煤耗κ为历史统计数据；① The unit average heating coal consumption κ is historical statistical data;

②机组平均供电煤耗τ为历史统计数据；② The average power supply coal consumption τ of the unit is historical statistical data;

③机组年运行小时数h为历史统计数据。③ The annual operating hours of the unit h are historical statistical data.

实例example

对于一个具体的凝汽器循环冷却水供水流量Qin＝7800t/h；凝汽器循环冷却水回水压力Pout＝0.12MPa，回水温度Tout＝42.8℃，凝汽器循环冷却水回水Hout＝179.3kJ/kg；凝汽器循环冷却水供水压力Pout＝0.28MPa，供水温度Tout＝16.7℃，凝汽器循环冷却水供水Hout＝70.3kJ/kg，的系统，利用步骤(1)的公式计算，For a specific condenser circulating cooling water supply flow Q in = 7800t/h; condenser circulating cooling water return pressure P out = 0.12MPa, return water temperature T out = 42.8°C, condenser circulating cooling water return Water H out = 179.3kJ/kg; condenser circulating cooling water supply pressure P out = 0.28MPa, supply water temperature T out = 16.7°C, condenser circulating cooling water supply water H out = 70.3kJ/kg, the system uses The formula calculation of step (1),

(1)热泵从凝汽器循环冷却水中吸收余热量的确定；(1) Determination of the residual heat absorbed by the heat pump from the circulating cooling water of the condenser;

My＝Qin·(Hout-Hin)＝Qin·[f(Pout，Tout)-f(Pin，Tin)]M y =Q in ·(H out −H in )=Q in ·[f(P out , T out )−f(P in , T in )]

经计算，热泵从凝汽器循环冷却水中吸收的余热量为236166kW；After calculation, the waste heat absorbed by the heat pump from the circulating cooling water of the condenser is 236166kW;

(2)提升凝汽器压力后机组发电功率减少量的确定；通过如下公式计算：(2) Determination of the reduction in generating power of the unit after the pressure of the condenser is increased; it is calculated by the following formula:

ΔN＝N×(P1-P0)×ηΔN=N×(P 1 -P 0 )×η

式中：机组发电机功率平均值N＝250000kW；提升后的凝汽器压力P1＝9.5kPa；正常运行时的凝汽器压力P0＝4.1kPa；凝汽器压力变化对机组发电机功率影响的修正系数η＝0.35％/kPa。In the formula: the average value of unit generator power N = 250000kW; the increased condenser pressure P 1 = 9.5kPa; the condenser pressure P 0 in normal operation = 4.1kPa; the influence of the condenser pressure change on the unit generator power The correction factor of influence η=0.35%/kPa.

经计算，提升凝汽器压力后机组发电功率减少量为4725kW；After calculation, the generating power reduction of the unit after increasing the condenser pressure is 4725kW;

(3)利用热泵回收凝汽器循环冷却水余热节能量的确定；通过如下公式计算：(3) Determination of energy saving by using the heat pump to recover the waste heat of the circulating cooling water of the condenser; it is calculated by the following formula:

G＝(My×κ-ΔN×τ)×hG=(M y ×κ-ΔN×τ)×h

式中：机组平均供热煤耗κ＝40g/MJ；机组平均供电煤耗τ＝340g/(kW.h)；机组年运行小时数h＝2800小时。In the formula: unit average heating coal consumption κ = 40g/MJ; unit average power supply coal consumption τ = 340g/(kW.h); unit annual operating hours h = 2800 hours.

经计算，利用热泵回收凝汽器循环冷却水余热节省标煤量G＝2850吨/年。After calculation, the use of the heat pump to recover the waste heat of the circulating cooling water of the condenser saves the amount of standard coal G = 2850 tons/year.

Claims (4)

1. the amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat is determined a method, it is characterized in that comprising that step is as follows:
(1) heat pump absorbs determining of waste heat amount from condenser recirculated cooling water; Determine that the formula using is:
M y＝Q in·(H out-H in)＝Q in·[f(P out，T out)-f(P in，T in)]
In formula: M yfor the waste heat amount that heat pump absorbs from condenser recirculated cooling water, kW; Q infor condenser recirculated cooling water water supply flow, t/h, Q in system in=Q out; H outfor condenser cooling water return enthalpy, kJ/kg, can pass through its pressure P outand temperature T outtable look-up and obtain; H infor condenser recirculated cooling water water supply enthalpy, kJ/kg, can pass through its pressure P inand temperature T intable look-up and obtain;
(2) promote determining of unit generation power reduction after condenser pressure; Determine that formula is:
ΔN＝N×(P 1-P 0)×η
In formula: Δ N is unit generation power reduction after lifting condenser pressure, kW; N is unit generation acc power, kW; P 1for the condenser pressure after promoting, kPa; P 0condenser pressure during for normal operation, kPa; η is that condenser pressure changes the correction factor to set generator power influences, %/kPa;
(3) utilize heat pump to reclaim determining of condenser circulating cooling water afterheat amount of energy saving, determine that formula is:
G＝(M y×κ-ΔN×τ)×h
Wherein, utilize heat pump to reclaim condenser circulating cooling water afterheat amount of energy saving and represent with the form of standard coal,
In formula: G is for utilizing heat pump to reclaim condenser circulating cooling water afterheat amount of energy saving, ton/year; κ is the average heat supply coal consumption of unit, g/MJ; τ is the average net coal consumption rate of unit, g/ (kW.h); H is unit year hours of operation, hour.
2. the amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat according to claim 1 is determined method, it is characterized in that: in described step (1) formula, each data volume all comes from unit DCS system data in timing statistics section.
3. the amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat according to claim 1 is determined method, it is characterized in that: in described step (2) formula, the source of each data volume is respectively:
1. unit generation acc power N comes from unit DCS system data in timing statistics section;
2. the condenser pressure P after promoting 1come from unit DCS system data in timing statistics section;
3. the condenser pressure P while normally operation 0come from unit history data;
4. condenser pressure variation comes from unit design description to the correction factor η of set generator power influences.
4. the amount of energy saving that utilizes heat pump to reclaim circulating cooling water afterheat according to claim 1 is determined method, it is characterized in that: in described step (3) formula, the source of each data volume is respectively:
1. the average heat supply coal consumption of unit κ is historical statistical data; 2. the average net coal consumption rate τ of unit is historical statistical data; 3. unit year hours of operation h is historical statistical data.
CN201410310146.6A 2014-07-01 2014-07-01 Heat pump is utilized to reclaim the amount of energy saving defining method of circulating cooling water afterheat Active CN104089435B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410310146.6A CN104089435B (en) 2014-07-01 2014-07-01 Heat pump is utilized to reclaim the amount of energy saving defining method of circulating cooling water afterheat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410310146.6A CN104089435B (en) 2014-07-01 2014-07-01 Heat pump is utilized to reclaim the amount of energy saving defining method of circulating cooling water afterheat

Publications (2)

Publication Number Publication Date
CN104089435A true CN104089435A (en) 2014-10-08
CN104089435B CN104089435B (en) 2016-06-08

Family

ID=51637174

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410310146.6A Active CN104089435B (en) 2014-07-01 2014-07-01 Heat pump is utilized to reclaim the amount of energy saving defining method of circulating cooling water afterheat

Country Status (1)

Country Link
CN (1) CN104089435B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105825285A (en) * 2015-01-08 2016-08-03 国家电网公司 Power plant circulating water source absorption-type heat pump energy saving amount determination method
CN109740235A (en) * 2018-12-28 2019-05-10 新奥数能科技有限公司 Determine method, apparatus, readable medium and the electronic equipment of coal-burning boiler coal conservation
CN110544183A (en) * 2019-09-19 2019-12-06 国网天津市电力公司电力科学研究院 combined heat and power generation unit recovery waste heat benefit calculation method based on absorption heat pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007064048A (en) * 2005-08-30 2007-03-15 Hitachi Eng Co Ltd Power plant waste heat recovery equipment
CN201836967U (en) * 2010-10-26 2011-05-18 北京国电电科院节能技术有限公司 Cogeneration energy saving device utilizing waste heat of direct air cooling unit for heat supply
CN203010751U (en) * 2012-12-25 2013-06-19 李同强 Heat-supply device utilizing waste heat of biomass power plant

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007064048A (en) * 2005-08-30 2007-03-15 Hitachi Eng Co Ltd Power plant waste heat recovery equipment
CN201836967U (en) * 2010-10-26 2011-05-18 北京国电电科院节能技术有限公司 Cogeneration energy saving device utilizing waste heat of direct air cooling unit for heat supply
CN203010751U (en) * 2012-12-25 2013-06-19 李同强 Heat-supply device utilizing waste heat of biomass power plant

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
王吉翔等: "烟气余热回收装置应用实例", 《节能工程》 *
赵虎等: "利用吸收式热泵回收电厂循环水余热的方案研究", 《电力科学与工程》 *
郭艳飞: "某热电厂循环水源吸收式特泵技术节能量测试", 《2012电力通信管理暨智能电网通信技术论坛论文集》 *
魏子萱: "节能技术评价与应用", 《中国学位论文全文数据库》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105825285A (en) * 2015-01-08 2016-08-03 国家电网公司 Power plant circulating water source absorption-type heat pump energy saving amount determination method
CN109740235A (en) * 2018-12-28 2019-05-10 新奥数能科技有限公司 Determine method, apparatus, readable medium and the electronic equipment of coal-burning boiler coal conservation
CN109740235B (en) * 2018-12-28 2022-11-29 新奥数能科技有限公司 Method and device for determining coal saving amount of coal-fired boiler, readable medium and electronic equipment
CN110544183A (en) * 2019-09-19 2019-12-06 国网天津市电力公司电力科学研究院 combined heat and power generation unit recovery waste heat benefit calculation method based on absorption heat pump

Also Published As

Publication number Publication date
CN104089435B (en) 2016-06-08

Similar Documents

Publication Publication Date Title
CN206890633U (en) A kind of recovery exhausted spare heat system in parallel based on absorption heat pump and high back pressure
CN104390388A (en) Steam type spraying-dead steam direct absorption type compound heat pump system
CN202195714U (en) A power plant steam-water system with exhaust steam heat exchange system
CN103017236A (en) Condensation heat recycle and supply system of power plant
CN203146044U (en) Dead steam heat recycle equipment of air cooling turbine
CN203464249U (en) Condensed water heat regenerative system with absorption heat pump
CN202788960U (en) Dead steam waste heat recovery device of humid-cool power plant
CN104089435B (en) Heat pump is utilized to reclaim the amount of energy saving defining method of circulating cooling water afterheat
CN202792190U (en) Extraction system of waste heat from exhaust steam of direct air-cooling unit
CN109356724B (en) Coupling method of flue gas waste heat supply and air inlet cooling and gas heating
CN203769869U (en) Waste heat recovery system for power plant
CN207763289U (en) High-efficiency cooling and heating unit coupled with internal combustion engine and bromine refrigerator
CN206387141U (en) A kind of combined twin-stage steam heat pump system
CN202023600U (en) CHP (combined heat and power) heat supply system for efficiently recovering exhaust steam waste heat of power station steam turbine
CN201836967U (en) Cogeneration energy saving device utilizing waste heat of direct air cooling unit for heat supply
CN204574092U (en) Boiler tail flue gas waste heat complicated utilization system
CN102182527A (en) Heat power combined heat supply system for efficiently recycling residual heat exhausted by steam turbine in power station
CN203671715U (en) Heat supply origin station system adopting heat gain type heat pump technology
CN205065867U (en) Indirect air cooling unit steam turbine steam exhaust waste heat recovery is used for heat supply network circulation water heating system
CN101476496A (en) Power generation system used for heat source at low temperature of 60-90 DEG C
CN218894688U (en) Full waste heat heating system for condensation heat recycling of direct air cooling unit of power plant
CN203441551U (en) Turbonator-based cooling water treatment system
CN106225005A (en) A kind of Direct Air-Cooled tower waste heat circulation system
CN101520252B (en) A New Process for Improving the Comprehensive Utilization Rate of Low-temperature Potential Heat Energy
CN204730508U (en) A kind ofly apply the energy-conservation device of lithium bromide

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C53 Correction of patent of invention or patent application
CB02 Change of applicant information

Address after: 300010 Tianjin city Hebei District Wujing Road No. 39

Applicant after: State Grid Corporation of China

Applicant after: State Grid Tianjin Electric Power Company

Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Applicant before: State Grid Corporation of China

Applicant before: State Grid Tianjin Electric Power Company

C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant