Cooling water pump for solar power generation

High flow pumps to cool down exhaust steam

Cooling water pumps (CWP) provide fresh water to cool the exhaust steam in the condenser and pump it back to the wet cooling tower or the outlet of open cooling system. The major characteristic of the CWP is their high flow. CWP are vertical column type. In small plants, they can be horizontal axially split type.

Solar panels

Sulzer provides the following vertical and horizontally axially split pumps as cooling water pumps for heliostat central tower with direct steam generation power plants:

SJT SJM
Capacities
Up to 62,000 m3/h / 270,000 USgpm Up to 58,000 m3/h / 250,000 USgpm
Heads Up to 110 m per stage / 350 ft Up to 30 m per stage / 1000 ft
Pressures
Up to 64 bar / 930 psi Up to 18 bar / 260 psi
Temperatures Up to 50°C / 122°F Up to 50°C / 122°F
SMD ZPP
Capacities
Up to 16,000 m3/h /
70,000 USgpm
Up to 30,000 m3/h /
132,000 USgpm
Heads Up to 260 m / 850 ft Up to 160 m / 525 ft
Pressures
Up to 34 bar / 490 psi Up to 25 bar / 230 psi
Temperatures Up to 140°C / 280°F Up to 120°C / 250°F

Products

  • SJM vertical mixed flow pump
    The SJM pump is a vertical, single or 2-stage, mixed flow bowl diffuser and is typically used wherever a liquid needs to be pumped upward at moderate pressure from open bodies of liquid.

  • SJT vertical turbine pump
    SJT pumps are typically used whenever a liquid needs to be pumped upward from ground water tables (deep well pumps), manmade underground storage (caverns) or open bodies of liquid. Fully updated hydraulics and mechanical designs make the SJT highly efficient, cost- effective, and low-maintenance.

  • SMD axially split casing double suction pump
    The SMD pumps are designed for a wide range of raw, clean, sea and brackish water applications. To meet the demands of the individual applications, the SMD benefits from a best-in-class hydraulic design that is combined with two specific mechanical envelopes; Standard SMD and Configured SMD.

  • ZPP double suction, axially split single stage centrifugal pump
    ZPP double suction axially split single stage centrifugal pumps are used for demanding high-capacity industrial applications to ensure process reliability, high efficiency, and low operating costs.

Processes and applications

Heliostat Central Tower with Direct Steam Generator (DSG)

Heliostat central tower with direct steam generator (DSG)

Heliostat central tower is the most promising option for the future as it needs less space and can be more efficient than parabolic trough. It allows to generate either low rate saturated or high rate superheated steam.

Heliostat with Central Tower and Direct Steam Generation

Heliostat central tower generates electric power from sunlight by focusing concentrated solar radiation on a tower mounted heat exchanger (receiver). The system uses thousands of sun-tracking mirrors called heliostats to reflect the incident sunlight onto the receiver. In this case, the primary Heat Transfer Fluid (HTF) is water that will directly convert into steam.

Our experienced service engineers help you to maintain your rotating equipment at the highest level of availability and reliability.

Heliostat Central Tower with Molten Salt and Heat Storage

Heliostat central tower with molten salt and heat storage

Heliostat central tower is the most promising option for the future as it needs less space and can be more efficient than parabolic trough. It allows to generate high-rate superheated steam.

Heliostat with Central Tower and Molten Salt Heat Storage

In this variant, the primary Heat Transfer Fluid (HTF) is cold molten salt at around 295 ºC that are circulated through the tower mounted heat exchanger (receiver). Molten salts are heated up there to around to 565°C which allows to generate high rate superheated or even supercritical steam. A part of the hot molten salt is stored in the hot molten salt tank to be able to release it after the sunset; this system extends the operating time of the CSP plant by some additional 6-7 hours.

Our experienced service engineers help you to maintain your rotating equipment at the highest level of availability and reliability.

Hybrid Integrated Solar Combined-Cycle (ISCC)

Hybrid integrated solar combined-cycle (ISCC)

A hybrid between a fossil-fired power plant (i.e. gas-fired combined-cycle) and a CSP plant. The solar field (either parabolic trough, linear Fresnel reflector or heliostat central tower) provides additional steam during the hours of high sun radiation to feed the main steam turbine. This configuration is typically used for power increase of any kind fossil-fired power plant.

Hybrid Integrated Solar Combined Cycle (ISCC)

In a combined-cycle plant, the high temperature exhaust gas from the turbine passes through the heat recovery steam generator (HRSG) from which high-pressure steam is addressed to a steam turbine. In ISCC installations, additional thermal energy from the solar steam generator is injected into the HRSG of a conventional combined-cycle plant. This boosts steam production and consequently electrical output at relatively low extra cost.

Our experienced service engineers help you to maintain your rotating equipment at the highest level of availability and reliability.

Linear Fresnel Reflector

Linear Fresnel reflector

Linear Fresnel reflector is the receiver technology having the lowest investment cost. The cost savings come from the inexpensive planar mirrors and the very simple tracking system used.

Linear Fresnel Reflector with Direct Steam Generation

The linear Fresnel reflector width can easily be three times the width of parabolic troughs, thus, the same amount of energy can be collected with a fraction of the absorber tube length. Direct Steam Generation (DSG) usually allows only to generate low rate saturated steam.

Our experienced service engineers help you to maintain your rotating equipment at the highest level of availability and reliability.

Parabolic Trough with Molten Salt Heat Storage

Parabolic trough with molten salt heat storage

Parabolic trough with heat storage has been widely tested since the early 2000's in several locations in Spain. A parabolic trough is a type of solar thermal energy collector; it is constructed as a long parabolic mirror with a tube running its length at the focal point.

Parabolic Trough with Molten Salt Heat Storage

In this variant, a part of the thermal oil used as primary Heat Transfer Fluid (HTF) is circulated through a heat exchanger where the heat is transferred to the molten salts circulated in a secondary circuit. This heat is stored in the hot molten salt tank to be able to release it after the sunset which extends the operating time of the CSP plant by some additional 6-7 hours. The working temperature is conditioned by the thermal oil optimum at around 350 ºC allowing to generate only low rate steam.

Our experienced service engineers help you to maintain your rotating equipment at the highest level of availability and reliability.

Parabolic Trough without Heat Storage

Parabolic trough without heat storage

Parabolic trough without heat storage is the most mature receiver technology as it was widely tested since the late 80's in the Mojave Desert (USA). A parabolic trough is a type of solar thermal energy collector. It is constructed as a long parabolic mirror with a tube running its length at the focal point.

Parabolic Trough without Heat Storage

In a parabolic trough plant, sunlight is reflected by the mirror and concentrated on the tube where thermal oil used as primary Heat Transfer Fluid (HTF) is circulated. The thermal oil optimum working temperature is around 350 ºC which allows to generate low rate steam. These CSP plants without heat storage can operate only during the hours of high sun radiation.

Our experienced service engineers help you to maintain your rotating equipment at the highest level of availability and reliability.

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