Technical_Specification_Heat_Pump_Packages_EN_v3.0 (002) (002).docx

Technical Specification

Modular water to water heat pump packages

Class A 50 kWel (Lot 1 + option) and Class B 100 kWel (Lot 2 – 5 incl. options) Including integrated air to glycol dry coolers

This document defines the complete supply and performance requirements for both package classes. Requirements apply to each class unless expressly qualified. The separate compliance matrix uses the same clause identifiers and wording.

1 Purpose and procurement concept

1.1 This specification defines minimum functional and technical requirements for two separate classes of complete modular water-to-water heat pump packages for boiler houses and district heating systems in Ukraine: Class A nominal 50 kWel and Class B nominal 100 kWel. Integrated air-to-glycol dry coolers are included in each package. Quantities and allocation by class shall be stated in the procurement schedule.

1.2 The specification is brand-neutral. References to capacity classes are used only to define the required equipment categories and shall not limit competition to a specific manufacturer, model or country of origin.

1.3 The primary heat pump functionality shall be water-to-water operation. Heat extraction from ambient air shall be implemented through an intermediate glycol/brine loop connected to dry coolers or air-source heat exchangers.

1.4 The same heat pump platform shall be suitable for operation with low-grade waste heat sources through a water or glycol loop, subject to the project-specific hydraulic design and heat exchanger selection.

2 Scope of supply

2.1 Each class shall be offered as a complete functional supply package. Site-specific design, civil works and permanent site installation works are excluded as defined in Section 14.

2.2 Each package shall include heat pump unit(s), integrated package/cascade controller, air-to-glycol dry cooler(s) with fans and drives, source glycol circulation pump(s), heat pump primary hot-water pump(s), necessary hydraulic modules, expansion and safety equipment, valves, strainers, sensors, electrical and control cabinets, package wiring and factory documentation. Include installation supervision, commissioning, functional testing and operator training. Declare connecting pipework/cabling limits and initial glycol-fill quantity and responsibility. All equipment necessary to meet the guaranteed package duty shall be included in the base price.

2.3 The tenderer shall clearly indicate all scope exclusions, required utilities, external interfaces and assumptions necessary for proper operation of the proposed system.

3 Equipment classes

3.1 Class A nominal electrical class is 50 kWel, with approximate rated package input 45–60 kWel at base duty. Class B nominal electrical class is 100 kWel, with approximate rated package input 90–120 kWel at base duty. These describe capacity classes; actual guaranteed and maximum electrical inputs shall be declared separately. Rated input uses the whole-package boundary in 5.2.

3.2 Either class may comprise one unit or multiple modular units operating as one coordinated package. A Class B package may comprise two nominal 50 kWel units. A Class A offer is a separate complete package and shall not be represented merely as half of a Class B package.

3.3 Configurations are technically equivalent where the complete offered class meets every mandatory thermal, efficiency, temperature, part-load, control, interface, service, warranty and documentation requirement. Physical unit count alone shall not confer preference.

3.4 Submit a separate complete technical response, performance guarantee, component schedule and package price for each class offered. Evaluation is at complete-package level for that class.

4 Design operating modes

4.1 Base duty for both classes is outdoor dry-bulb air temperature A−7°C and continuous heating-water leaving temperature W55°C (55°C). This is an air-to-glycol-to-water package condition, not a direct air-to-water heat pump rating. The bidder shall select and guarantee a thermally balanced dry cooler, glycol loop and heat pump at that condition, declaring source entering/leaving temperatures, hot-water return temperature, flows and glycol concentration. Use the same sink return temperature and external hydraulic duty for compared bids; any difference shall be disclosed and normalised before comparison.

4.2 Continuous operation at W55 is mandatory at base duty. Guaranteed useful heat output and COP shall be achieved simultaneously at that operating point without external electric reheating.

4.3 Maximum achievable leaving-water temperature shall be at least 60°C without external electric reheating. Declare source and ambient conditions, heating-water return temperature, achievable capacity, package input and duration/operating limits at 60°C; a transient temperature peak alone is not an acceptable demonstration of useful heating capability.

4.4 Confirmed continuous operation at 65°C or above without external electric reheating is preferred and may be scored only under the published evaluation methodology. Declare the complete operating conditions, capacity, input, COP and limits. Failure to offer this preference shall not constitute failure of the mandatory temperature requirement.

4.5 Low-temperature buffer charging mode: operation with leaving water temperature in the range of 35-45°C for charging thermal accumulators or low-temperature heating circuits.

4.6 Waste heat recovery mode: operation from a water/glycol source loop connected to low-grade waste heat. The tenderer shall state the allowable source-side temperature range, flow rates, heat exchanger requirements and control limitations.

5 Minimum performance requirements

5.1 At base duty, Class A shall deliver at least 115 kWth useful heat and Class B at least 230 kWth. No discretionary exception below these minima applies. Each class shall also independently meet COP ≥2.3: Quseful / Ppackage ≥2.3. Thus the required output is at least max(class minimum, 2.3 × actual guaranteed package electrical input); a nominal electrical class alone does not demonstrate compliance.

5.2 Guaranteed package performance shall include net useful heating output at the hot-water supply/return delivery boundary and simultaneous total electrical input. Ppackage includes compressors, dry cooler fans, glycol pump(s), primary hot-water pump(s), controls, drives, crankcase heaters and all other supplied auxiliaries consuming power in that operating state. Include any required auxiliary located outside the physical heat pump enclosure. Identify standby loads separately; no double counting of integral pumps is allowed. External electric reheating shall not contribute to guaranteed useful output.

5.3 Minimum whole-package COP at base duty is 2.3 for both classes. Higher verified whole-package COP may be scored. Unit-only COP is supplementary and shall not replace package COP. Show each electrical component load and the summed package input at each guaranteed point; disclose corrections, measurement uncertainty and any excluded site load.

5.4 COP in low-temperature buffer charging mode W35-W45 shall be declared for the complete package.

5.5 Guaranteed performance shall be provided at 25%, 50%, 75% and 100% of package load, including thermal output, total electrical input, COP and the number of operating compressor circuits/units.

5.6 The tenderer shall declare the minimum stable operating capacity of the complete package, the control method used to achieve it, and any minimum run-time or cycling limitations.

5.7 Performance data shall also be provided for W35, W45, W55 and the proposed waste-heat source mode, or for the closest technically equivalent certified points with transparent interpolation methodology.

5.8 Every performance point shall identify ambient condition, source and sink entering/leaving temperatures, glycol type and concentration, flows, hydraulic head/pressure drops, electrical boundary and auxiliaries. Where component test evidence is used, provide a traceable package calculation including fan and pump power at the declared duty. Identify measured, certified, interpolated and calculated values separately.

6 Cascade operation and control

6.1 Each class shall operate as one integrated system. Package cascade control is mandatory for multiple units; equivalent internal circuit capacity control is acceptable for a single unit. The common plant control architecture shall permit coordination of at least four physical units or four packages, as applicable; identify any additional hardware/licences needed for expansion.

6.2 The package/plant controller shall provide automatic staging, load sharing, lead/lag rotation where more than one unit or circuit is available, equalisation of operating hours, start/stop sequencing, fault isolation and coordinated operation with buffer tanks.

6.3 Where multiple independent units or circuits are offered, the controls shall permit continued operation at reduced capacity following loss of one unit/circuit. Declare residual capacity and common points of failure; no automatic preference shall arise from physical unit count.

6.4 The control system shall allow external setpoint input for leaving water temperature, buffer charging temperature, operating mode and capacity limitation.

6.5 The system shall provide communication with external BMS/SCADA through Modbus TCP/IP or BACnet IP. Other open protocols may be offered as additional functionality.

6.6 The tenderer shall provide a description of cascade control logic, input/output list, communication register map and alarms/faults available to BMS/SCADA.

6.7 Local control of safe operation and essential package functions shall remain operational without internet or cloud access. Provide open communication interfaces, exportable operating data and documented access to settings and alarms needed for integration with EMS/SCADA.

7 Hydraulic and thermal integration

7.1 Include primary hot-water pumping and source glycol pumping required for the guaranteed package operating points. Declare available external head, pump selection, duty power, control range, connection sizes, pressure losses and all site-side interface assumptions.

7.2 The heat pump package shall be suitable for connection to thermal accumulators / buffer tanks and shall allow charging and discharging logic to be coordinated with the cascade controller.

7.3 The supplied dry cooler/source-loop system shall be fully coordinated with the heat pump controller, including variable fan/pump control as appropriate, source temperature management, start/stop interlocks, low-temperature protection, alarms and safe shutdown.

7.4 The tenderer shall state recommended glycol concentration, minimum source-loop temperature, frost protection limits, pressure drops, required flow rates and water quality requirements.

7.5 For waste heat use, the tenderer shall state acceptable source fluid types, source inlet/outlet temperature range, minimum flow requirements and limitations related to fouling or corrosive media.

7.6 Dry coolers shall be sized by the bidder to extract the source heat required for base duty at A−7°C for each offered class. Submit the selection calculation with air and glycol conditions, approach temperatures, heat-transfer duty, fan speed/power, pump duty and a consistent package heat balance. A catalogue heat-rejection rating at unrelated temperatures is insufficient.

7.7 The complete air-source package, including dry coolers, pumps, controls and exposed components, shall be capable of operation down to at least −20°C ambient. Declare guaranteed available useful output, electrical input, COP, achievable LWT and operating limitations at A−20°C; W55 performance shall be stated explicitly, including any limitation. The base-duty output and COP minima do not automatically apply at −20°C.

7.8 Declare glycol type, concentration and basis (mass or volume), freezing/crystallisation and burst-protection temperatures, minimum permissible fluid temperatures, entering/leaving temperatures at each selection point, flow rates, fluid properties used, total volume and filling requirements. Demonstrate freeze protection suitable for the declared −20°C ambient envelope, including shutdown/power-loss conditions and the specified minimum fluid temperature.

7.9 For each dry cooler declare manufacturer/model, quantity, thermal extraction duty, airflow, fan count/type, speed range, individual and total fan electrical input, sound power level with test method and operating point, and sound pressure level only with distance and measurement conditions. Declare dimensions, mass, service clearances, lifting/access provisions, materials/coating and corrosion protection, outdoor protection rating and installation/environmental limits.

7.10 Declare dry cooler and source-loop design/maximum operating pressure, test pressure, pressure drops, connections, allowable fluid temperatures, water/glycol compatibility and maintenance provisions. Describe frost/ice accumulation risk, prevention or removal strategy, condensate/drainage requirements and its effect on time-averaged output and package COP; no specific proprietary frost-control technology is prescribed.

7.11 Provide a complete package hydraulic schematic and interface schedule showing delivery boundaries, field connections, pump positions, metering points, expansion/safety provisions, glycol isolation, filling/venting/draining and controls. Distinguish supplied items from site works. Dry coolers, source pumps and their functional control equipment shall not be excluded or priced solely as options.

8 Electrical requirements

8.1 Electrical supply: 3-phase, 380-400 V AC, 50 Hz, unless a different voltage is explicitly proposed and justified by the tenderer for international equipment.

8.2 The tenderer shall state maximum operating current, starting current, recommended protection devices, short-circuit requirements, power factor and harmonic distortion data.

8.3 Starting current shall be limited through inverter drives, soft starters or equivalent solutions suitable for boiler-house electrical systems.

8.4 Electrical/control cabinets supplied with the package shall include the necessary protection, control and communication equipment for safe operation of the supplied heat pump system.

8.5 The tenderer shall provide a single-line electrical diagram, control cabinet layout, terminal list and list of external electrical interfaces.

9 Refrigerant safety and environmental requirements

9.1 The refrigerant shall not be prescribed by the procuring entity. The tenderer shall select a refrigerant suitable for the proposed heat pump design and compliant with applicable Ukrainian environmental, safety and import requirements.

9.2 The tenderer shall provide refrigerant type, GWP, ODP, refrigerant charge per circuit, safety class, flammability/toxicity class, pressure levels and required safety measures.

9.3 Refrigerants with low GWP and long-term regulatory viability are strongly preferred. The tenderer shall demonstrate compliance with applicable Ukrainian requirements and identify any restrictions applicable to import, installation, servicing and future availability of the proposed refrigerant.

9.4 Low GWP is a preference, not a blanket prohibition of fluorinated gases. Provide the GWP value with its assessment basis/reference and demonstrate safety, serviceability and lifecycle reliability. No refrigerant brand or proprietary platform is prescribed.

9.5 The heat pump system shall be designed, manufactured, tested, marked and documented in accordance with applicable safety and environmental requirements for refrigerating systems and heat pumps, including EN 378 / DSTU EN 378 or equivalent.

9.6 Where flammable refrigerants are used, the tenderer shall provide a dedicated safety concept covering ventilation, gas detection, electrical classification, emergency shutdown, installation restrictions and maintenance procedures.

10 Documentation and certification

10.1 The tenderer shall provide technical datasheets, performance tables, dimensional drawings, hydraulic diagrams, electrical diagrams, control diagrams, installation manual, operation and maintenance manual, and commissioning protocol template.

10.2 Performance data shall be based on recognised test standards such as EN 14511, EN 14825, AHRI or equivalent. The applied standard and test boundary conditions shall be clearly indicated.

10.3 The tenderer shall provide CE declaration or equivalent conformity documentation, pressure equipment documentation where applicable, and documentation required for legal import and operation in Ukraine.

10.4 All documentation shall be provided in English.

11 Commissioning training and warranty

11.1 Provide a commissioning and acceptance plan covering both classes as supplied: hydraulic/electrical checks, glycol fill/protection, safety trips, fan/pump control, W55 operation, capacity control, TES interface, BMS/SCADA and offline control. Record useful output and all package electrical loads using calibrated instruments and declared uncertainty. Where outdoor test conditions differ from base duty, use an agreed traceable correction method and manufacturer selection evidence; do not infer A−7 compliance from an uncorrected site reading. Rectify defects and repeat failed tests before acceptance.

12 Information required with the technical bid

12.1 Submit the separate Mandatory Technical Compliance Matrix, with a response for every requirement and separate offered values/evidence for each class. Use Offered Value, Evidence Reference, Compliant Yes-No and Comments. Identify every deviation explicitly; an unqualified Yes without supporting evidence is insufficient.

12.2 Package-level performance tables at the required operating points and at 25%, 50%, 75% and 100% load, including guaranteed heat output, total electrical input, COP, source-side flow, hot-side flow, pressure drops and minimum stable capacity.

12.3 Provide cascade logic, complete hydraulic concept, dry cooler selection and glycol-loop integration, TES interface and waste-heat integration concept, with supply and installation boundaries.

12.4 List of supplied components, excluded components, required external components and optional components.

12.5 Provide a refrigerant and safety statement identifying applicable Ukrainian and relevant EU requirements, conformity evidence and any restrictions; do not substitute an unsupported general compliance statement.

13 Exclusions and interfaces

13.1 Excluded site works are site-specific design, civil works, foundations, building reconstruction, secondary district-heating piping/pumps, external power supply, permanent site installation and permitting, unless expressly included in the procurement schedule. These exclusions do not remove the dry coolers, glycol pumps, primary pumps, controls or other functional package components required by Section 2. Declare limits and quantities of field interconnections and consumables.

13.2 The supplier shall provide sufficient interface information for the design contractor and installation contractor responsible for boiler-house reconstruction.

13.3 Before bid issue, the procuring entity shall publish class quantities, site electrical limits, common hot-water return temperature and available/required external hydraulic head, installation/noise constraints and scoring weights in the procurement schedule. If any input is absent, tenderers shall state it explicitly and submit transparent selection assumptions; materially different assumptions shall be resolved on a common basis through the procurement procedure before final technical/financial comparison.

14 Standards and conformity references

14.1 EN 378: Refrigerating systems and heat pumps - safety and environmental requirements, or equivalent internationally recognised standards.

14.2 Recognised performance test standards such as EN 14511, EN 14825, AHRI or equivalent, depending on the proposed equipment type and available certification.