Wet Stacking Remedy for Diesel Generators (LHG800)

LHG800 For Generators

  • Most Suitable for Generators up to 40 kVA

  • Adjustable Load up to 11 HP (8 kW)

  • Incremental Engine Heating up to 16kW

  • Near-Instantaneous Coolant and Exhaust Heat

  • Instantaneous Engine Load prevents Stacking at the engine

  • Addresses Engine Stacking SCR / DPF Regeneration Performance and Reliability

  • Unmatched Performance

  • Low Cost

  • Highly Efficient (>98%)

Typical Kit Components and Considerations

Typical Kit
LHG800
Deluxe-Controller
Typical LHG Kit Harness
Typical LHG Kit Harness
Mounting Brackets
Mounting Brackets
Secondary Drive Pulley
Secondary Drive Pulley
All Necessary Fasteners
Fasteners
Hoses
Hoses
Serpentine Belt
Show More

The LHG is mounted to the Engine as an accessory in a similar arrangement as an alternator.

The LHG is fed with coolant from the rear of the cylinder head and coolant is returned to the inlet of the water pump.

Ventech can supplies a complete Installation Kit including the   following:

  • LHG Heater

  • Bulkhead-mounted LHG Controller

  • Bulkhead-mounted Current Measurement Module

  • Electrical Harness & Enable Switch

  • All Mounting Brackets

  • Belt & Tensioner (if applicable)

  • Hoses & Clamps

  • Fasteners and Cable Ties

  • Installation Documentation

Front Engine Accessory Drive Mounting (FEAD) Considerations

  • The Ventech LHG is a belt-driven system and is activated via an automotive-style electromagnetic clutch

  • The LHG can be driven off the primary belt or using a secondary polyvee 8-groove belt (in which case, a belt tensioner is required)

  • Using a drive pulley on the crankshaft, a speed-increase ratio of at least 1:1.8 is established. Pulley size (ratio) is selected based on the desired kW@RPM requirements.

  • The LHG should see 150° of belt wrap, and not less than 120°. It is also critical that the belt be properly aligned to the rest of the system.

  • The clutch current draw is 4 Amperes at 12VDC. Failure to deliver adequate voltage can result in severe clutch plate slippage and consequently clutch / LHG failure. Safeguards should be implemented to prevent the engagement of the clutch plate when voltage draws down, such as when air intake heaters are activated. Additionally, a time delay must be implemented so that the clutch is not re-engaged in fewer than 5 seconds from a disengagement.

Electrical / Control Strategy

  • The clutch current draw is 4 Amperes at 12VDC.

  • Failure to deliver adequate voltage can result in severe clutch plate slippage and consequently clutch / LHG failure.

  • Safeguards should be implemented to prevent the engagement of the clutch plate when voltage draws down, such as when air intake heaters are activated.

  • Typically, the LHG can be activated via a relay output from the Generator’s embedded controller. Ventech can provide guidance for Activate/Deactivate control strategy. A clutch protection protocol must be part of the control system implementing a strategy whereby the clutch will not re-engage during low voltage conditions or within 5 seconds of a clutch disengagement.

  • Ventech can provide dedicated control system hardware, include Generator Current Measurement Threshold Circuitry if required. The ECU considers ambient air temperature, coolant temperature, RPM, and voltage levels.

Plumbing

  • The LHG hydraulic arrangement is simple and straightforward.

  • The LHG inlet port is connected to a high-pressure point in the engine cooling system, typically to a fitting at the rear of the engine cylinder head.

  • The LHG outlet port is connected as close as possible to the inlet of the engine water pump.

  • The LHG is available with a choice of 5/8”, ¾”, and 1” barbed fittings.

  • For maintenance considerations, isolation valves can be installed up and downstream of the LHG.