Request for Proposal of
Package optimization and Light weight
design for Hybrid Electric Propulsion
system
2021. 3. 30
SOW of Package optimization and light weight design
Table of Contents
Conditions for modification and cancellation of SOW................................................4
3.4 Kick-off and Final meeting.............................................................................................8
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SOW of Package optimization and light weight design
1
General Information
1.1
Project Information
A Hybrid Electric Propulsion (HEP) system development project launched in 2021 is a basic
technology R&D project which is led by Korea Aerospace Research Institute and funded by
the ROK government. This project was initiated by the needs of adopting a gas turbine engine
based-hybrid electric propulsion system for a long endurance and high payload eVTOL (e-
Vertical Take-Off and Landing). All electric VTOL is known as to have limitations of payload
and range due to restricted energy density of Li-Ion battery. The goal of this project covers to
establish an optimal design of the hybrid electric propulsion system and to do the HEP system
performance test at a newly constructed ground test facility. The HEP system has many
components such as a turboshaft engine, a generator, a rectifier, several battery packs, motors,
inverters, heat exchangers, and etc. It requires the layout deign for effective package and the
light weight design using DfAM (Design for Additive Manufacturing). Therefore, this
technical project will cover the packaging optimization of an electric engine nacelle and the
light weight design of a battery pack housing.
1.2
Schedule and process
1.2.1 Schedule and location
Table 1 Schedule
Time*
Event
Within one week after
contract
KARI provide document for design of an electric
engine nacelle and geometry of battery cell
TBD
Kick off meeting
One week after optimization
formulation
Interim presentation
One week before final
meeting
Submission of final report
End of Nov., 2021
Final presentation
15st Dec., 2021
Contract expiration
*) Earlier is better
1.2.1.1
Kick off meeting shall be performed at the contractor site
but it can be changed due to COVID-9. (exact date will be determined
later)
Final meeting shall be held at the KARI. (exact date and location will be
fixed later)
1.2.2 Selection process and schedule
1.2.2.1
Selection process
1.2.2.2
Inquiries related with a proposal preparation may be asked or
sent by mail to the following person.
Jae Sung Huh, Ph.D.
Aeropropulsion Research Division
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SOW of Package optimization and light weight design
Korea Aerospace Research Institute
169-84 Gwahak-ro, Yuseong-Gu, Daejeon, Korea
jshuh@kari.re.kr
Tel) 82-42-860-2831 / Fax) 82-42-860-2626
1.3
Conditions for modification and cancellation of SOW
1.3.1 KARI reserves the right to change or modify the SOW if there is any
change in the technical and business requirements of the SOW even after
SOW issuance. Upon the incurred changes or modification of the SOW as
above, the contractor shall submit the modified proposal in accordance
with the specific instructions provided by KARI.
1.3.2 KARI reserves the right to withdraw this SOW at any time with a
written notice to the contractor, in case of the proposal provided by the
contactor does not meet the requirements of the SOW.
1.3.3 KARI reserves right to cancel the contract, if the contractor cannot
get the approvals for the export license from the concerned governments
within one month after the contract.
1.4
Preparation of the proposal
1.4.1 Proposal shall be prepared in English.
1.4.2 The basic unit shall be SI unit. British unit of power and weight
could be used as a complementary unit. SI unit comes first and British unit
shall be put in parentheses.
1.4.3 In order to substantiate a proposal, all relevant data shall be
submitted as attachments. The proposal which is improvable or based on
vague presumptions shall be excluded.
1.4.4 All electronic files including documentary evidences shall be
prepared with MS-WORD and submitted by e-mail the address stated in
Article 1.2.2.2.
1.4.5 The contractor shall obtain all required approvals for export license
from the contractor’s government.
1.4.6 In case of any changes herein including cancellation of the
program, KARI will notify contractor.
1.4.7 Time and date in the SOW are specified by the Korean Standard
Time (GMT+09:00) and Date.
1.4.8 The proposal and relevant documents provided by contractor will
not be returned.
1.5
Notes for the preparation of Proposal
1.5.1 This proposal constitutes a firm and irrevocable offer. All prices
shall remain valid until the final contract.
1.5.2 The negotiated price shall not exceed the price initially proposed
except when KARI requires additional items during negotiation.
1.5.3 The contractor shall be responsible for all costs and expenses in
preparation of its proposal and negotiation with KARI.
1.6
Authority of KARI
1.6.1 KARI reserves the right to reject proposals that are unrealistic or
unreliable. KARI will not disclose the result of proposal evaluation.
1.7
Maintenance of Secrecy
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SOW of Package optimization and light weight design
1.7.1 The contractor shall not disclose any part of this SOW without prior
permission of KARI.
1.7.2 The contract may not, in any manner, advertise or publish any
matter in relation to the contractor’s proposal.
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SOW of Package optimization and light weight design
2
Introduction
2.1
Conceptual design of a hybrid propulsion system
A schematic design of a series hybrid propulsion system is shown in Fig. 1, and in general,
the system features a couple of cruise propellers (or prop-rotors) and several lift prop-rotors.
Each cruise propeller or lift prop-rotor connects to an electric motor and an inverter which are
installed in an electric engine nacelle with accessary components for thermal management
system and tilting mechanism as shown in Fig. 2.
Figure 1. Schematic of HEP system
2.2
Electric Engine Nacelle
An electric engine nacelle has a motor, inverters and cooling devices, and the cooling system
consists of a heat exchanger, a fluid pump, a fluid tank, a fan, and several valves as shown in
Fig. 2. To minimize cruise drag, the nacelle has the size limitation and all components should
be laid out efficiently in the limited space.
Figure 2. Example of electric engine nacelles (Left: NASA X-57 Nacelle, Right: US
2019/0329859A1)
2.3
Battery pack housing
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SOW of Package optimization and light weight design
A hybrid propulsion system has two power sources such as turbo-generator and Li-Ion battery
which satisfy the high-energy and high-power requirements respectively. The Li-Ion battery
has lower energy density and therefore the mass of battery pack should be minimized under
some constraints of cooling effectiveness and structural integrity.
Figure 3. Example of topology optimization of a batter pack housing
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Scope of work
3.1
General description
The goal of this project is to define the mathematical model and formulation for packaging
optimization and light weight design, and to solve the optimization problem with advanced
in-house code that the contractor has. Finally, the optimized geometry and the next work
scope shall be proposed.
3.2
Packaging optimization
3.2.1 KARI will provide the geometry of the electric engine nacelle and
the list of all components in it, which could include a motor, inverters, a
heat exchanger, a water pump, a water tank, a cooling fan and etc.
3.2.2 The contractor shall generate a simplified model, which can also
describe the interface with other components, of all components in the
electric engine nacelle.
3.2.3 The contractor shall define the mathematical model/formulation for
packaging optimization which can describe the efficient layout of all
components in the nacelle envelope and shall discuss it with KARI.
3.2.4 If necessary, the contractor shall customize the in-house code that
the contractor has been developing, and then solve the packaging
optimization formulation with its own code.
3.2.5 The contractor shall provide the interim optimized result, and shall
suggest the next research scope.
3.2.6 The results of packaging optimization and the plan shall be
provided within one week before final meeting and prepared in MS WORD
or MS Power Point format by KARI.
3.3
Lightweight design of battery pack housing
3.3.1 KARI will provide the geometry of a battery cell selected by KARI,
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SOW of Package optimization and light weight design
and the surface temperatures measured from the discharging test of the
battery cell if possible.
3.3.2 The contractor shall generate the partial model of the battery pack
housing, which considers the periodic layout of battery cells in the pack
3.3.3 The contractor shall define the mathematical problem for topology
optimization of the battery pack housing, and the formulation shall
consider structural integrity, vibration characteristics, and heat dissipation
capability. However, these performance functions are not limited.
3.3.4 If necessary, the contractor shall customize the in-house code that
the contractor has been developing, and then solve the topology
optimization problem.
3.3.5 The contractor shall post-process the optimized geometry and shall
propose both of the interim design of the battery pack housing and the
next process for optimizing the full model of battery pack housing.
3.3.6 The optimization report and the plan shall be submitted within one
week before final meeting and prepared in MS WORD or MS Power Point
format by KARI.
3.3.7 Advisory review report shall be submitted one week before the
final meeting in MS WORD or MS Power Point format.
3.4
Kick-off and final meeting
3.4.1 The contractor shall prepare for kick off and final meeting as stated
in 1.2.1
3.4.2 To leave an evidence for kick-off and final meetings, lecture
materials presented during kick-off meeting and final meeting shall be
provided to KARI in electronic file format
3.4.3 If sensitive information is included, it should be removed and
provided to KARI.
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Other requirements
4.1
Meeting room for kick-off and final meetings
4.1.1 A meeting room shall be prepared by contractor for kick-off
meeting at contractor’s location
4.1.2 The meeting room shall be equipped with free WIFI.
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Proposal Requirement
5.1
Contents of Proposal requirements
5.1.1 Proposal summary
5.1.2 Consultants
5.1.2.1
Consulting team summary
5.1.2.2
Consultants experiences
5.1.3 Proposal
5.1.3.1
Scope of work for key topics
5.1.3.2
A monthly base plan
5.2
Price proposal
5.2.1 Price shall be proposed in Korean WON (Y2021).
5.2.2 Contractor shall include all cost items to cover the all activities in
their proposals and itemize requested items.
5.2.3 The proposed price shall reflect possible fluctuations in labor costs,
material prices and others in the proposed price. Therefore, the contractor
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SOW of Package optimization and light weight design
shall not demand to reflect the fluctuation in cost due to cost items not
stated in the contractor's proposal in the future.
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Terms and Conditions
6.1
General terms and conditions
6.1.1 Shall follow KARI’s terms and conditions
6.2
Intellectual property
6.2.1 All deliverable items(results) produced belongs to KARI.
6.3
Taxes
6.3.1 The VAT incurred in KOREA is excluded and will be taken in charge
by KARI
6.3.2 As of the time of this proposal, the Applicable Tax (i.e. Corporation
taxes (withholding taxes), herein referred to as “Applicable Tax”) is
excluded from the Total Price. KARI shall withhold the Applicable Tax and
pay on behalf of Contractor to the relevant Korean taxing authority in
accordance with applicable Korean law.
7.
Miscellaneouss
- Contract
. The Contract will be effective subject to the KARI’s approval thereof. The draft of
Contract will be provided and be the basis of the Contract negotiation with the Successful
Bidder.
- Certificate and Government Approvals
. If necessary, Bidder shall receive the government approval and certificates (e.g. export
licenses) in relevant countries, necessary for Bidder’s work for the RFP.
- Confidentiality
. There shall be no news release, public announcements, denials or confirmation in
connection with the RFP or Contract award without the prior written approval of KARI.
All elements of the RFP shall be kept confidential, and shall not be intentionally disclosed
by Bidder to any Third Party.
- Withdrawal of Proposal
. Bidder may withdraw its Proposal at any time before the Bid Closing Date and Time.
Withdrawal shall be made in writing, and shall be received by KARI before the Bid
Closing Date and Time.
- Property of Proposal
. All documents submitted in response to the RFP shall become the property of KARI and
will be retained by KARI.
- Expenses
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SOW of Package optimization and light weight design
. Expenses incurred by Bidder in connection with the preparation, submission, and any
subsequent clarification or negotiation activities are for its own account and will not be
reimbursed by KARI
- Governing Law
. The RFP and Contract shall be construed in accordance with and governed by the laws of
the Republic of Korea.
- Arbitration
. Any disputes in relation to, and under the RFP and Contract shall be resolved through
arbitration in Seoul, Korea under the Rules of the Korean Commercial Arbitration Board.
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