Is an Industrial Heat-Pump Project Worth Doing? Temperature Lift, COP, Tariffs and Payback

An industrial heat-pump project is worth advancing when four conditions overlap: a recoverable source is available when heat is needed; the required temperature lift stays inside a credible equipment envelope; seasonal performance lowers delivered-heat cost; and the saving remains meaningful after auxiliaries, downtime, maintenance and integration cost are included.

The first screen should return advance, advance with conditions, or pause and measure—not a procurement-grade equipment selection.

1. Source boundary: entering and minimum leaving temperature, available flow or recoverable duty, and its hourly/seasonal profile.
2. Demand boundary: process supply and return temperature, required duty, hygiene or product constraints, and its operating profile.
3. Operating overlap: hours when recoverable heat and useful demand exist at the same time.
4. Incumbent heat: boiler efficiency, steam price, fuel price, demand charges and current O&M.
5. Heat-pump electricity: tariff by time period, auxiliaries and any refrigeration-side power penalty.
6. Integration: heat exchangers, buffer storage, piping, water treatment, shutdown windows and space.

Use the site boundary—not a brochure point:

• Annual useful heat: Q_year = useful heat duty × simultaneous operating hours.
• Heat-pump electricity: E_HP = Q_year ÷ seasonal performance factor.
• Heat-pump energy cost: C_HP = E_HP × electricity tariff, plus auxiliaries and incremental O&M.
• Incumbent fuel input: E_base = Q_year ÷ delivered-heat efficiency.
• Annual saving: incumbent delivered-heat cost minus heat-pump delivered-heat cost.
• Simple payback: installed project cost ÷ annual saving. Use discounted cash flow before an investment decision.

Temperature lift should ultimately be checked between refrigerant evaporation and condensation levels, including heat-exchanger approaches. Process water temperatures alone are not the compressor lift.

Illustrative values only—not a customer result. A process needs 1 MW of useful heat for 4,000 simultaneous hours, or 4,000 MWh/year. At an assumed seasonal performance factor of 3.2, the heat pump uses about 1,250 MWh/year. At CNY 0.70/kWh, electricity costs about CNY 875,000/year.

If the incumbent gas input costs CNY 0.32/kWh and delivers heat at 90% efficiency, supplying the same useful heat requires about 4,444 MWh of gas input, or CNY 1.422 million/year. The gross energy-cost difference is therefore about CNY 547,000/year before auxiliaries, maintenance, demand charges and downtime. An installed cost of CNY 3.0 million would imply a simple payback of roughly 5.5 years before those corrections.

Halving simultaneous hours roughly halves annual energy saving while installed integration cost may barely move. That is why annual overlap often matters more than a small improvement in rated COP.

• Source and demand profiles have not been measured, or rarely overlap.
• The project relies on raising refrigeration condensing pressure without counting added compressor power.
• COP comes from a single rated point outside the real source/sink envelope.
• The comparison mixes fuel input price, delivered steam price and useful-heat output.
• Fouling, water quality, product hygiene, pressure equipment or refrigerant safety is unresolved.
• Payback depends on an undisclosed subsidy or on uninterrupted full-load operation.

Start with the values you already know. The tool will keep assumptions visible and list missing data instead of fabricating them.

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This is an early decision framework, not equipment selection, safety review, detailed design, a performance guarantee or financial advice. Verify manufacturer envelopes, applicable standards, tariffs and site measurements with qualified engineers before procurement.

当以下四个条件同时成立时，工业热泵项目才值得继续：用热发生时有稳定可回收热源；所需温升处于可信设备运行包络内；季节性能能够降低单位供热成本；计入辅机、停机、维护和系统集成后，节省仍然有意义。

第一次初筛应给出建议继续、有条件继续或暂缓并补测，而不是直接给出可采购的设备选型。

1. 热源边界：入口温度、最低允许出口温度、可用流量或可回收热量，以及逐时/季节变化。
2. 用热边界：工艺供回温度、热负荷、卫生或产品约束，以及运行曲线。
3. 同时运行：可回收热量与有效用热需求同时存在的小时数。
4. 现有热源：锅炉效率、蒸汽价格、燃料价格、需量费用和现有运维。
5. 热泵用电：分时电价、辅机电耗，以及可能增加的制冷系统功耗。
6. 系统集成：换热器、缓冲储热、管路、水处理、停机窗口与安装空间。

初筛应使用现场边界，而不是宣传工况：

• 年有效供热量：Q_年 = 有效热负荷 × 同时运行小时。
• 热泵耗电量：E_HP = Q_年 ÷ 季节性能系数。
• 热泵能源费用：C_HP = E_HP × 电价，再计入辅机与新增运维。
• 现有燃料输入：E_基线 = Q_年 ÷ 现有供热效率。
• 年度节省：现有单位供热成本减去热泵单位供热成本。
• 简单回收期：项目安装成本 ÷ 年度节省。投资决策前还应采用折现现金流。

温升最终应按工质蒸发与冷凝温度核对，并计入换热端差；工艺水温之差并不等于压缩机实际温升。

以下仅为说明计算方法的假设值，不是客户项目结果。某工艺需要 1 MW 有效热量，每年热源与用热同时存在 4,000 小时，因此年有效供热量为 4,000 MWh。假设季节性能系数为 3.2，热泵年耗电约 1,250 MWh；按 0.70 元/kWh 计，年电费约 87.5 万元。

如果现有燃气输入价格为 0.32 元/kWh、供热效率为 90%，提供同样热量需要约 4,444 MWh 燃气输入，年费用约 142.2 万元。未计辅机、维护、需量费用和停机影响前，能源费用差约 54.7 万元/年。若安装投资为 300 万元，修正前简单回收期约 5.5 年。

如果同时运行小时减半，年节省通常也会大致减半，而系统集成投资未必明显减少。因此，相比铭牌 COP 小幅提高，同时运行时间往往更能决定项目价值。

• 热源与用热曲线尚未测量，或两者很少同时出现。
• 方案依赖提高制冷冷凝压力，却没有计算压缩机新增功耗。
• COP 只来自一个偏离实际热源/热端边界的额定点。
• 经济比较混用了燃料输入价、成品蒸汽价和有效供热量。
• 结垢、水质、产品卫生、压力设备或工质安全问题尚未解决。
• 回收期依赖未确认补贴，或假设全年不间断满负荷运行。

先填写已经掌握的数据。工具会保留假设并列出缺失项，不会替您编造工程数据。

开始工业热泵项目初筛 → · 查看现场与公开来源案例 →

本文是早期决策框架，不是设备选型、安全审查、详细设计、性能保证或财务建议。采购前应由合格工程师核对设备运行包络、适用标准、能源价格和现场测量。